Case-sensitive package names

102 files changed, 315 insertions, 314 deletions

diff --git a/doc/StaticPkg.3 b/doc/StaticPkg.3
index b22edcc..b907aaa 100644
--- a/doc/StaticPkg.3
+++ b/doc/StaticPkg.3
@@ -22,8 +22,7 @@ already been loaded (i.e., the caller has already invoked the
 appropriate initialization procedure).  NULL means the package
 has not yet been incorporated into any interpreter.
 .AP "const char" *pkgName in
-Name of the package;  should be properly capitalized (first letter
-upper-case, all others lower-case).
+Name of the package.
 .AP Tcl_PackageInitProc *initProc in
 Procedure to invoke to incorporate this package into a trusted
 interpreter.
diff --git a/doc/zipfs.n b/doc/zipfs.n
index 2d84173..da2e026 100644
--- a/doc/zipfs.n
+++ b/doc/zipfs.n
@@ -14,7 +14,7 @@
 zipfs \- Mount and work with ZIP files within Tcl
 .SH SYNOPSIS
 .nf
-\fBpackage require zipfs \fR?\fB1.0\fR?
+\fBpackage require tcl::zipfs \fR?\fB1.0\fR?
 .sp
 \fBzipfs canonical\fR ?\fImntpnt\fR? \fIfilename\fR ?\fIZIPFS\fR?
 \fBzipfs exists\fR \fIfilename\fR
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 88e51be..ea17ee8 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -1175,6 +1175,7 @@ Tcl_CreateInterp(void)
      */
 
     Tcl_PkgProvideEx(interp, "Tcl", TCL_PATCH_LEVEL, &tclStubs);
+    Tcl_PkgProvideEx(interp, "tcl", TCL_PATCH_LEVEL, &tclStubs);
 
     if (TclTommath_Init(interp) != TCL_OK) {
 	Tcl_Panic("%s", TclGetString(Tcl_GetObjResult(interp)));
diff --git a/generic/tclLoad.c b/generic/tclLoad.c
index c143d0a..bea07ed 100644
--- a/generic/tclLoad.c
+++ b/generic/tclLoad.c
@@ -226,14 +226,8 @@ Tcl_LoadObjCmd(
 	    Tcl_DStringAppend(&pkgName, packageName, -1);
 	    TclDStringClear(&tmp);
 	    Tcl_DStringAppend(&tmp, pkgPtr->packageName, -1);
-	    Tcl_UtfToLower(Tcl_DStringValue(&pkgName));
-	    Tcl_UtfToLower(Tcl_DStringValue(&tmp));
-	    if (strcmp(Tcl_DStringValue(&tmp),
-		    Tcl_DStringValue(&pkgName)) == 0) {
-		namesMatch = 1;
-	    } else {
-		namesMatch = 0;
-	    }
+	    namesMatch = (strcmp(Tcl_DStringValue(&tmp),
+		    Tcl_DStringValue(&pkgName)) == 0);
 	}
 	TclDStringClear(&pkgName);
 
@@ -359,27 +353,29 @@ Tcl_LoadObjCmd(
 	}
 
 	/*
-	 * Fix the capitalization in the package name so that the first
-	 * character is in caps (or title case) but the others are all
-	 * lower-case.
-	 */
-
-	Tcl_DStringSetLength(&pkgName,
-		Tcl_UtfToTitle(Tcl_DStringValue(&pkgName)));
-
-	/*
-	 * Compute the names of the two initialization functions, based on the
+	 * Compute the names of the initialization functions, based on the
 	 * package name.
 	 */
 
 	TclDStringAppendDString(&initName, &pkgName);
-	TclDStringAppendLiteral(&initName, "_Init");
-	TclDStringAppendDString(&safeInitName, &pkgName);
+	Tcl_DStringSetLength(&initName,
+		Tcl_UtfToTitle(Tcl_DStringValue(&initName)));
+	while (strchr(Tcl_DStringValue(&initName), ':') != NULL) {
+	    char *r;
+	    p = Tcl_DStringValue(&initName);
+	    r = strchr((char *)p, ':');
+	    if ((r != NULL) && (r[1] == ':')) {
+		memmove(r, r+2, strlen(r+1));
+	    }
+	    Tcl_DStringSetLength(&initName, strlen(p));
+	}
+	TclDStringAppendDString(&safeInitName, &initName);
 	TclDStringAppendLiteral(&safeInitName, "_SafeInit");
-	TclDStringAppendDString(&unloadName, &pkgName);
+	TclDStringAppendDString(&unloadName, &initName);
 	TclDStringAppendLiteral(&unloadName, "_Unload");
-	TclDStringAppendDString(&safeUnloadName, &pkgName);
+	TclDStringAppendDString(&safeUnloadName, &initName);
 	TclDStringAppendLiteral(&safeUnloadName, "_SafeUnload");
+	TclDStringAppendLiteral(&initName, "_Init");
 
 	/*
 	 * Call platform-specific code to load the package and find the two
@@ -663,14 +659,8 @@ Tcl_UnloadObjCmd(
 	    Tcl_DStringAppend(&pkgName, packageName, -1);
 	    TclDStringClear(&tmp);
 	    Tcl_DStringAppend(&tmp, pkgPtr->packageName, -1);
-	    Tcl_UtfToLower(Tcl_DStringValue(&pkgName));
-	    Tcl_UtfToLower(Tcl_DStringValue(&tmp));
-	    if (strcmp(Tcl_DStringValue(&tmp),
-		    Tcl_DStringValue(&pkgName)) == 0) {
-		namesMatch = 1;
-	    } else {
-		namesMatch = 0;
-	    }
+	    namesMatch = (strcmp(Tcl_DStringValue(&tmp),
+		    Tcl_DStringValue(&pkgName)) == 0);
 	}
 	TclDStringClear(&pkgName);
 
diff --git a/generic/tclOO.c b/generic/tclOO.c
index b60ab1f..e958279 100644
--- a/generic/tclOO.c
+++ b/generic/tclOO.c
@@ -138,7 +138,10 @@ static const Tcl_MethodType classConstructor = {
  */
 
 static const char *initScript =
+#ifndef TCL_NO_DEPRECATED
 "package ifneeded TclOO " TCLOO_PATCHLEVEL " {# Already present, OK?};"
+#endif
+"package ifneeded tcl::oo " TCLOO_PATCHLEVEL " {# Already present, OK?};"
 "namespace eval ::oo { variable version " TCLOO_VERSION " };"
 "namespace eval ::oo { variable patchlevel " TCLOO_PATCHLEVEL " };";
 /* "tcl_findLibrary tcloo $oo::version $oo::version" */
@@ -257,7 +260,11 @@ TclOOInit(
 	return TCL_ERROR;
     }
 
-    return Tcl_PkgProvideEx(interp, "TclOO", TCLOO_PATCHLEVEL,
+#ifndef TCL_NO_DEPRECATED
+    Tcl_PkgProvideEx(interp, "TclOO", TCLOO_PATCHLEVEL,
+    	    (void *) &tclOOStubs);
+#endif
+    return Tcl_PkgProvideEx(interp, "tcl::oo", TCLOO_PATCHLEVEL,
 	    (void *) &tclOOStubs);
 }
 
diff --git a/generic/tclOOStubLib.c b/generic/tclOOStubLib.c
index a9fa212..221d99a 100644
--- a/generic/tclOOStubLib.c
+++ b/generic/tclOOStubLib.c
@@ -35,14 +35,19 @@ TclOOInitializeStubs(
     const char *version)
 {
     int exact = 0;
-    const char *packageName = "TclOO";
+    const char *packageName = "tcl::oo";
     const char *errMsg = NULL;
     TclOOStubs *stubsPtr = NULL;
     const char *actualVersion = tclStubsPtr->tcl_PkgRequireEx(interp,
 	    packageName, version, exact, &stubsPtr);
 
     if (actualVersion == NULL) {
-	return NULL;
+	packageName = "TclOO";
+	actualVersion = tclStubsPtr->tcl_PkgRequireEx(interp,
+		packageName, version, exact, &stubsPtr);
+	if (actualVersion == NULL) {
+	    return NULL;
+	}
     }
     if (stubsPtr == NULL) {
 	errMsg = "missing stub table pointer";
diff --git a/generic/tclTest.c b/generic/tclTest.c
index a8ca463..d7f16f8 100644
--- a/generic/tclTest.c
+++ b/generic/tclTest.c
@@ -460,7 +460,7 @@ Tcltest_Init(
     }
     /* TIP #268: Full patchlevel instead of just major.minor */
 
-    if (Tcl_PkgProvideEx(interp, "Tcltest", TCL_PATCH_LEVEL, NULL) == TCL_ERROR) {
+    if (Tcl_PkgProvideEx(interp, "tcl::test", TCL_PATCH_LEVEL, NULL) == TCL_ERROR) {
 	return TCL_ERROR;
     }
 
diff --git a/generic/tclTestProcBodyObj.c b/generic/tclTestProcBodyObj.c
index db6ec8a..437644e 100644
--- a/generic/tclTestProcBodyObj.c
+++ b/generic/tclTestProcBodyObj.c
@@ -20,7 +20,7 @@
  * name and version of this package
  */
 
-static const char packageName[] = "procbodytest";
+static const char packageName[] = "tcl::procbodytest";
 static const char packageVersion[] = "1.1";
 
 /*
@@ -75,7 +75,7 @@ static const CmdTable safeCommands[] = {
  *
  * Procbodytest_Init --
  *
- *	This function initializes the "procbodytest" package.
+ *	This function initializes the "tcl::procbodytest" package.
  *
  * Results:
  *	A standard Tcl result.
@@ -99,7 +99,7 @@ Procbodytest_Init(
  *
  * Procbodytest_SafeInit --
  *
- *	This function initializes the "procbodytest" package.
+ *	This function initializes the "tcl::procbodytest" package.
  *
  * Results:
  *	A standard Tcl result.
@@ -315,7 +315,7 @@ ProcBodyTestProcObjCmd(
  *	procbodytest::check
  *
  *  Performs an internal check that the Tcl_PkgPresent() command returns
- *  the same version number as was registered when the procbodytest package
+ *  the same version number as was registered when the tcl::procbodytest package
  *  was provided.  Places a boolean in the interp result indicating the
  *  test outcome.
  *
diff --git a/generic/tclZipfs.c b/generic/tclZipfs.c
index 4a13970..ceb0833 100644
--- a/generic/tclZipfs.c
+++ b/generic/tclZipfs.c
@@ -4771,7 +4771,7 @@ TclZipfs_Init(
 		Tcl_NewStringObj("::tcl::zipfs::find", -1));
 	Tcl_CreateObjCommand(interp, "::tcl::zipfs::tcl_library_init",
 		ZipFSTclLibraryObjCmd, NULL, NULL);
-	Tcl_PkgProvide(interp, "zipfs", "2.0");
+	Tcl_PkgProvide(interp, "tcl::zipfs", "2.0");
     }
     return TCL_OK;
 #else /* !HAVE_ZLIB */
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index ea6a1f2..05f13b5 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -3957,7 +3957,10 @@ TclZlibInit(
      * Formally provide the package as a Tcl built-in.
      */
 
-    return Tcl_PkgProvide(interp, "zlib", TCL_ZLIB_VERSION);
+#ifndef TCL_NO_DEPRECATED
+    Tcl_PkgProvide(interp, "zlib", TCL_ZLIB_VERSION);
+#endif
+    return Tcl_PkgProvide(interp, "tcl::zlib", TCL_ZLIB_VERSION);
 }
 
 /*
diff --git a/tests/assocd.test b/tests/assocd.test
index 7d89daa..5185e29 100644
--- a/tests/assocd.test
+++ b/tests/assocd.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testgetassocdata [llength [info commands testgetassocdata]]
 testConstraint testsetassocdata [llength [info commands testsetassocdata]]
diff --git a/tests/async.test b/tests/async.test
index ad058a0..642e295 100644
--- a/tests/async.test
+++ b/tests/async.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testasync [llength [info commands testasync]]
 testConstraint knownMsvcBug [expr {![info exists ::env(TRAVIS_OS_NAME)] || ![string match windows $::env(TRAVIS_OS_NAME)]}]
diff --git a/tests/basic.test b/tests/basic.test
index 1711094..02a93aba 100644
--- a/tests/basic.test
+++ b/tests/basic.test
@@ -21,7 +21,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testevalex [llength [info commands testevalex]]
 testConstraint testcmdtoken [llength [info commands testcmdtoken]]
diff --git a/tests/chanio.test b/tests/chanio.test
index 858db7f..f88f266 100644
--- a/tests/chanio.test
+++ b/tests/chanio.test
@@ -36,8 +36,8 @@ namespace eval ::tcl::test::io {
 
     catch {
 	::tcltest::loadTestedCommands
-	package require -exact Tcltest [info patchlevel]
-	set ::tcltestlib [lindex [package ifneeded Tcltest [info patchlevel]] 1]
+	package require -exact tcl::test [info patchlevel]
+	set ::tcltestlib [lindex [package ifneeded tcl::test [info patchlevel]] 1]
     }
     package require tcltests
 
@@ -7493,7 +7493,7 @@ test chan-io-59.1 {Thread reference of channels} {testmainthread testchannel} {
 test chan-io-60.1 {writing illegal utf sequences} {fileevent testbytestring} {
     # This test will hang in older revisions of the core.
     set out [open $path(script) w]
-    chan puts $out "catch {load $::tcltestlib Tcltest}"
+    chan puts $out "catch {load $::tcltestlib tcl::test}"
     chan puts $out {
 	chan puts [testbytestring \xe2]
 	exit 1
@@ -7576,7 +7576,7 @@ test chan-io-70.1 {Transfer channel} -setup {
     lappend res [catch {chan seek $c 0 start}]
     set tid [thread::create -preserved]
     thread::send $tid [list set c $c]
-    thread::send $tid {load {} Tcltest}
+    thread::send $tid {load {} tcl::test}
     lappend res [thread::send $tid {
 	testchannel splice $c
 	set res [catch {chan seek $c 0 start}]
diff --git a/tests/cmdAH.test b/tests/cmdAH.test
index 97b2e91..67c49c7 100644
--- a/tests/cmdAH.test
+++ b/tests/cmdAH.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testchmod       [llength [info commands testchmod]]
 testConstraint testsetplatform [llength [info commands testsetplatform]]
diff --git a/tests/cmdIL.test b/tests/cmdIL.test
index 0b118f8..83cbfa4 100644
--- a/tests/cmdIL.test
+++ b/tests/cmdIL.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Used for constraining memory leak tests
 testConstraint memory [llength [info commands memory]]
diff --git a/tests/cmdInfo.test b/tests/cmdInfo.test
index e690002..b4f6fa8 100644
--- a/tests/cmdInfo.test
+++ b/tests/cmdInfo.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testcmdinfo  [llength [info commands testcmdinfo]]
 testConstraint testcmdtoken [llength [info commands testcmdtoken]]
diff --git a/tests/compExpr-old.test b/tests/compExpr-old.test
index 7a9aa5c..48cf639 100644
--- a/tests/compExpr-old.test
+++ b/tests/compExpr-old.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Big test for correct ordering of data in [expr]
 
diff --git a/tests/compExpr.test b/tests/compExpr.test
index 35d7588..f6fe333 100644
--- a/tests/compExpr.test
+++ b/tests/compExpr.test
@@ -14,7 +14,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Constrain memory leak tests
 testConstraint memory [llength [info commands memory]]
diff --git a/tests/compile.test b/tests/compile.test
index ef6ab65..dd94b06 100644
--- a/tests/compile.test
+++ b/tests/compile.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
 
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint exec       [llength [info commands exec]]
 testConstraint memory     [llength [info commands memory]]
@@ -500,7 +500,7 @@ test compile-13.2 {TclCompileScript: testing expected nested scripts compilation
     # with 1500 (1000 in debug) nested scripts (bodies). If you get SO/SF exceptions on some low-stack
     # boxes or systems, please don't decrease it (either provide a constraint)
     ti eval {foreach cmd {eval "if 1" try catch} {
-	set c [gencode [expr {![::tcl::pkgconfig get debug] ? 1500 : 1000}] $cmd]
+	set c [gencode [expr {"debug" ni [split [package provide tcl] .] ? 1500 : 1000}] $cmd]
 	if 1 $c
     }}
     ti eval {set result}
diff --git a/tests/config.test b/tests/config.test
index b78e29d..bcf948e 100644
--- a/tests/config.test
+++ b/tests/config.test
@@ -17,9 +17,9 @@ if {"::tcltest" ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 
-test pkgconfig-1.1 {query keys} {
+test pkgconfig-1.1 {query keys} -body {
     lsort [::tcl::pkgconfig list]
-} {64bit bindir,install bindir,runtime compile_debug compile_stats debug dllfile,runtime docdir,install docdir,runtime includedir,install includedir,runtime libdir,install libdir,runtime mem_debug optimized profiled scriptdir,install scriptdir,runtime threaded zipfile,runtime}
+} -match glob -result {*bindir,install bindir,runtime*dllfile,runtime docdir,install docdir,runtime includedir,install includedir,runtime libdir,install libdir,runtime*scriptdir,install scriptdir,runtime*zipfile,runtime}
 test pkgconfig-1.2 {query keys multiple times} {
     string compare [::tcl::pkgconfig list] [::tcl::pkgconfig list]
 } 0
diff --git a/tests/coroutine.test b/tests/coroutine.test
index 6d79fd7..3ff325e 100644
--- a/tests/coroutine.test
+++ b/tests/coroutine.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testnrelevels [llength [info commands testnrelevels]]
 testConstraint memory [llength [info commands memory]]
diff --git a/tests/dcall.test b/tests/dcall.test
index 7d86135..e2133fd 100644
--- a/tests/dcall.test
+++ b/tests/dcall.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testdcall [llength [info commands testdcall]]
 
diff --git a/tests/dstring.test b/tests/dstring.test
index 8a24ebe..c571b5f 100644
--- a/tests/dstring.test
+++ b/tests/dstring.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testdstring [llength [info commands testdstring]]
 if {[testConstraint testdstring]} {
diff --git a/tests/encoding.test b/tests/encoding.test
index d0ca114..c16c7ef 100644
--- a/tests/encoding.test
+++ b/tests/encoding.test
@@ -19,7 +19,7 @@ namespace eval ::tcl::test::encoding {
 
 catch {
     ::tcltest::loadTestedCommands
-    package require -exact Tcltest [info patchlevel]
+    package require -exact tcl::test [info patchlevel]
 }
 
 proc toutf {args} {
diff --git a/tests/env.test b/tests/env.test
index c901148..fcbf455 100644
--- a/tests/env.test
+++ b/tests/env.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 package require tcltests
 
 # [exec] is required here to see the actual environment received by child
diff --git a/tests/event.test b/tests/event.test
index 3194547..3728025 100644
--- a/tests/event.test
+++ b/tests/event.test
@@ -14,8 +14,8 @@ namespace import -force ::tcltest::*
 
 catch {
     ::tcltest::loadTestedCommands
-    package require -exact Tcltest [info patchlevel]
-    set ::tcltestlib [lindex [package ifneeded Tcltest [info patchlevel]] 1]
+    package require -exact tcl::test [info patchlevel]
+    set ::tcltestlib [lindex [package ifneeded tcl::test [info patchlevel]] 1]
 }
 
 
@@ -436,7 +436,7 @@ catch {rename bgerror {}}
 
 test event-8.1 {Tcl_CreateExitHandler procedure} {stdio testexithandler} {
     set child [open |[list [interpreter]] r+]
-    puts $child "catch {load $::tcltestlib Tcltest}"
+    puts $child "catch {load $::tcltestlib tcl::test}"
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; exit"
     flush $child
@@ -450,7 +450,7 @@ odd 41
 
 test event-9.1 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
     set child [open |[list [interpreter]] r+]
-    puts $child "catch {load $::tcltestlib Tcltest}"
+    puts $child "catch {load $::tcltestlib tcl::test}"
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 41"
     puts $child "testexithandler create 16; exit"
@@ -464,7 +464,7 @@ even 4
 }
 test event-9.2 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
     set child [open |[list [interpreter]] r+]
-    puts $child "catch {load $::tcltestlib Tcltest}"
+    puts $child "catch {load $::tcltestlib tcl::test}"
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 4"
     puts $child "testexithandler create 16; exit"
@@ -478,7 +478,7 @@ odd 41
 }
 test event-9.3 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
     set child [open |[list [interpreter]] r+]
-    puts $child "catch {load $::tcltestlib Tcltest}"
+    puts $child "catch {load $::tcltestlib tcl::test}"
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 6"
     puts $child "testexithandler create 16; exit"
@@ -492,7 +492,7 @@ odd 41
 }
 test event-9.4 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
     set child [open |[list [interpreter]] r+]
-    puts $child "catch {load $::tcltestlib Tcltest}"
+    puts $child "catch {load $::tcltestlib tcl::test}"
     puts $child "testexithandler create 41; testexithandler delete 41"
     puts $child "testexithandler create 16; exit"
     flush $child
diff --git a/tests/exec.test b/tests/exec.test
index 5082393..458e12a 100644
--- a/tests/exec.test
+++ b/tests/exec.test
@@ -20,7 +20,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 package require tcltests
 
 # All tests require the "exec" command.
diff --git a/tests/execute.test b/tests/execute.test
index daaad16..a29259d 100644
--- a/tests/execute.test
+++ b/tests/execute.test
@@ -20,7 +20,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 catch {namespace delete {*}[namespace children :: test_ns_*]}
 catch {rename foo ""}
@@ -683,12 +683,12 @@ test execute-6.11 {Tcl_ExprObj: exprcode interp validation} -setup {
 } -constraints testexprlongobj -body {
     set e { [llength {}]+1 }
     set result {}
-    load {} Tcltest child
+    load {} tcl::test child
     interp alias {} e child testexprlongobj
     lappend result [e $e]
     interp delete child
     interp create child
-    load {} Tcltest child
+    load {} tcl::test child
     interp alias {} e child testexprlongobj
     lappend result [e $e]
 } -cleanup {
@@ -985,7 +985,7 @@ test execute-8.6 {Compile epoch bump in global level (bug [fa6bf38d07])} -setup
     interp create child
     child eval {
 	package require tcltest 2.5
-	catch [list package require -exact Tcltest [info patchlevel]]
+	catch [list package require -exact tcl::test [info patchlevel]]
 	::tcltest::loadTestedCommands
 	if {[namespace which -command testbumpinterpepoch] eq ""} {
 	  proc testbumpinterpepoch {} { rename ::set ::dummy; rename ::dummy ::set }
@@ -1018,7 +1018,7 @@ test execute-8.7 {Compile epoch bump in global level (bug [fa6bf38d07]), excepti
     interp create child
     child eval {
 	package require tcltest 2.5
-	catch [list package require -exact Tcltest [info patchlevel]]
+	catch [list package require -exact tcl::test [info patchlevel]]
 	::tcltest::loadTestedCommands
 	if {[namespace which -command testbumpinterpepoch] eq ""} {
 	  proc testbumpinterpepoch {} { rename ::set ::dummy; rename ::dummy ::set }
diff --git a/tests/expr-old.test b/tests/expr-old.test
index 914530e..ab33e06 100644
--- a/tests/expr-old.test
+++ b/tests/expr-old.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testexprlong   [llength [info commands testexprlong]]
 testConstraint testexprdouble [llength [info commands testexprdouble]]
diff --git a/tests/expr.test b/tests/expr.test
index 5e00841..c185580 100644
--- a/tests/expr.test
+++ b/tests/expr.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Determine if "long int" type is a 32 bit number and if the wide
 # type is a 64 bit number on this machine.
diff --git a/tests/fCmd.test b/tests/fCmd.test
index a1e0a6e..986e2f4 100644
--- a/tests/fCmd.test
+++ b/tests/fCmd.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 cd [temporaryDirectory]
 
diff --git a/tests/fileName.test b/tests/fileName.test
index ac93383..bef5a22 100644
--- a/tests/fileName.test
+++ b/tests/fileName.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testsetplatform [llength [info commands testsetplatform]]
 testConstraint testtranslatefilename [llength [info commands testtranslatefilename]]
diff --git a/tests/fileSystem.test b/tests/fileSystem.test
index 19066ee..93a3f51 100644
--- a/tests/fileSystem.test
+++ b/tests/fileSystem.test
@@ -25,7 +25,7 @@ namespace eval ::tcl::test::fileSystem {
 testConstraint loaddll 0
 catch {
     ::tcltest::loadTestedCommands
-    package require -exact Tcltest [info patchlevel]
+    package require -exact tcl::test [info patchlevel]
     set ::ddever [package require dde]
     set ::ddelib [lindex [package ifneeded dde $::ddever] 1]
     set ::regver  [package require registry]
@@ -33,7 +33,7 @@ catch {
     testConstraint loaddll 1
 }
 
-# Test for commands defined in Tcltest executable
+# Test for commands defined in tcl::test package
 testConstraint testfilesystem  	    [llength [info commands ::testfilesystem]]
 testConstraint testsetplatform 	    [llength [info commands ::testsetplatform]]
 testConstraint testsimplefilesystem [llength [info commands ::testsimplefilesystem]]
diff --git a/tests/get.test b/tests/get.test
index 9e7728a..071b874 100644
--- a/tests/get.test
+++ b/tests/get.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testgetint [llength [info commands testgetint]]
 testConstraint testdoubleobj [llength [info commands testdoubleobj]]
diff --git a/tests/indexObj.test b/tests/indexObj.test
index 079eb52..0f3f2db 100644
--- a/tests/indexObj.test
+++ b/tests/indexObj.test
@@ -14,7 +14,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testindexobj [llength [info commands testindexobj]]
 testConstraint testparseargs [llength [info commands testparseargs]]
diff --git a/tests/info.test b/tests/info.test
index e0ebda34..3d746f3 100644
--- a/tests/info.test
+++ b/tests/info.test
@@ -20,7 +20,7 @@ if {{::tcltest} ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 testConstraint zlib [llength [info commands zlib]]
 
 # Set up namespaces needed to test operation of "info args", "info body",
diff --git a/tests/interp.test b/tests/interp.test
index 6ffa098..faa7a50 100644
--- a/tests/interp.test
+++ b/tests/interp.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testinterpdelete [llength [info commands testinterpdelete]]
 
diff --git a/tests/io.test b/tests/io.test
index a3e3b6f..33ea187 100644
--- a/tests/io.test
+++ b/tests/io.test
@@ -31,8 +31,8 @@ namespace eval ::tcl::test::io {
 
     catch {
 	::tcltest::loadTestedCommands
-	package require -exact Tcltest [info patchlevel]
-	set ::tcltestlib [lindex [package ifneeded Tcltest [info patchlevel]] 1]
+	package require -exact tcl::test [info patchlevel]
+	set ::tcltestlib [lindex [package ifneeded tcl::test [info patchlevel]] 1]
     }
     package require tcltests
 
@@ -8385,7 +8385,7 @@ test io-60.1 {writing illegal utf sequences} {fileevent testbytestring} {
     # This test will hang in older revisions of the core.
 
     set out [open $path(script) w]
-    puts $out "catch {load $::tcltestlib Tcltest}"
+    puts $out "catch {load $::tcltestlib tcl::test}"
     puts $out {
 	puts [testbytestring \xe2]
 	exit 1
@@ -8477,7 +8477,7 @@ test io-70.1 {Transfer channel} {testchannel thread} {
 
     set tid [thread::create -preserved]
     thread::send $tid [list set c $c]
-    thread::send $tid {load {} Tcltest}
+    thread::send $tid {load {} tcl::test}
     lappend res [thread::send $tid {
 	testchannel splice $c
 	set res [catch {seek $c 0 start}]
diff --git a/tests/ioCmd.test b/tests/ioCmd.test
index 749d225..7b21baa 100644
--- a/tests/ioCmd.test
+++ b/tests/ioCmd.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 package require tcltests
 
@@ -2085,8 +2085,8 @@ test iocmd-32.0 {origin interpreter of moved channel gone} -match glob -body {
     set idb [interp create];#puts <<$idb>>
 
     # Magic to get the test* commands in the children
-    load {} Tcltest $ida
-    load {} Tcltest $idb
+    load {} tcl::test $ida
+    load {} tcl::test $idb
 
     # Set up channel in interpreter
     interp eval $ida $helperscript
@@ -2123,8 +2123,8 @@ test iocmd-32.1 {origin interpreter of moved channel destroyed during access} -m
     set idb [interp create];#puts <<$idb>>
 
     # Magic to get the test* commands in the children
-    load {} Tcltest $ida
-    load {} Tcltest $idb
+    load {} tcl::test $ida
+    load {} tcl::test $idb
 
     # Set up channel in thread
     set chan [interp eval $ida $helperscript]
@@ -2194,7 +2194,7 @@ proc inthread {chan script args} {
     # Test thread.
 
     set tid [thread::create -preserved]
-    thread::send $tid {load {} Tcltest}
+    thread::send $tid {load {} tcl::test}
 
     # Init thread configuration.
     # - Listed variables
@@ -2833,7 +2833,7 @@ test iocmd.tf-24.17.bug3522560 {postevent for transfered channel} \
 	    return
 	}
 	LOG THREAD-STARTED
-	load {} Tcltest
+	load {} tcl::test
 	proc bgerror s {
 	    LOG BGERROR:$s
 	}
@@ -3790,10 +3790,10 @@ test iocmd.tf-32.0 {origin thread of moved channel gone} -match glob -body {
 
     #puts <<$tcltest::mainThread>>main
     set tida [thread::create -preserved];#puts <<$tida>>
-    thread::send $tida {load {} Tcltest}
+    thread::send $tida {load {} tcl::test}
 
     set tidb [thread::create -preserved];#puts <<$tidb>>
-    thread::send $tidb {load {} Tcltest}
+    thread::send $tidb {load {} tcl::test}
 
     # Set up channel in thread
     thread::send $tida $helperscript
@@ -3840,9 +3840,9 @@ test iocmd.tf-32.1 {origin thread of moved channel destroyed during access} -mat
 
     #puts <<$tcltest::mainThread>>main
     set tida [thread::create -preserved];#puts <<$tida>>
-    thread::send $tida {load {} Tcltest}
+    thread::send $tida {load {} tcl::test}
     set tidb [thread::create -preserved];#puts <<$tidb>>
-    thread::send $tidb {load {} Tcltest}
+    thread::send $tidb {load {} tcl::test}
 
     # Set up channel in thread
     thread::send $tida $helperscript
diff --git a/tests/ioTrans.test b/tests/ioTrans.test
index f185117..e96d603 100644
--- a/tests/ioTrans.test
+++ b/tests/ioTrans.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Custom constraints used in this file
 testConstraint testchannel [llength [info commands testchannel]]
@@ -1163,8 +1163,8 @@ test iortrans-11.0 {origin interpreter of moved transform gone} -setup {
     set ida [interp create];	#puts <<$ida>>
     set idb [interp create];	#puts <<$idb>>
     # Magic to get the test* commands in the children
-    load {} Tcltest $ida
-    load {} Tcltest $idb
+    load {} tcl::test $ida
+    load {} tcl::test $idb
 } -constraints {testchannel} -match glob -body {
     # Set up channel and transform in interpreter
     interp eval $ida $helperscript
@@ -1206,8 +1206,8 @@ test iortrans-11.1 {origin interpreter of moved transform destroyed during acces
     set ida [interp create];	#puts <<$ida>>
     set idb [interp create];	#puts <<$idb>>
     # Magic to get the test* commands in the children
-    load {} Tcltest $ida
-    load {} Tcltest $idb
+    load {} tcl::test $ida
+    load {} tcl::test $idb
 } -constraints {testchannel} -match glob -body {
     # Set up channel in thread
     set chan [interp eval $ida $helperscript]
@@ -1246,7 +1246,7 @@ test iortrans-11.1 {origin interpreter of moved transform destroyed during acces
 test iortrans-11.2 {delete interp of reflected transform} -setup {
     interp create child
     # Magic to get the test* commands into the child
-    load {} Tcltest child
+    load {} tcl::test child
 } -constraints {testchannel} -body {
     # Get base channel into the child
     set c [tempchan]
@@ -1285,7 +1285,7 @@ test iortrans-11.2 {delete interp of reflected transform} -setup {
 proc inthread {chan script args} {
     # Test thread.
     set tid [thread::create -preserved]
-    thread::send $tid {load {} Tcltest}
+    thread::send $tid {load {} tcl::test}
 
     # Init thread configuration.
     # - Listed variables
@@ -2002,9 +2002,9 @@ test iortrans.tf-8.2 {close flushes write buffers, writes data} -setup {
 test iortrans.tf-11.0 {origin thread of moved transform gone} -setup {
     #puts <<$tcltest::mainThread>>main
     set tida [thread::create -preserved];	#puts <<$tida>>
-    thread::send $tida {load {} Tcltest}
+    thread::send $tida {load {} tcl::test}
     set tidb [thread::create -preserved];	#puts <<$tida>>
-    thread::send $tidb {load {} Tcltest}
+    thread::send $tidb {load {} tcl::test}
 } -constraints {testchannel thread} -match glob -body {
     # Set up channel in thread
     thread::send $tida $helperscript
@@ -2046,9 +2046,9 @@ testConstraint notValgrind [expr {![testConstraint valgrind]}]
 test iortrans.tf-11.1 {origin thread of moved transform destroyed during access} -setup {
     #puts <<$tcltest::mainThread>>main
     set tida [thread::create -preserved];	#puts <<$tida>>
-    thread::send $tida {load {} Tcltest}
+    thread::send $tida {load {} tcl::test}
     set tidb [thread::create -preserved];	#puts <<$tidb>>
-    thread::send $tidb {load {} Tcltest}
+    thread::send $tidb {load {} tcl::test}
 } -constraints {testchannel thread notValgrind} -match glob -body {
     # Set up channel in thread
     thread::send $tida $helperscript
diff --git a/tests/iogt.test b/tests/iogt.test
index fb04b5b..0f1e439 100644
--- a/tests/iogt.test
+++ b/tests/iogt.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 namespace eval ::tcl::test::iogt {
     namespace import ::tcltest::*
diff --git a/tests/lindex.test b/tests/lindex.test
index f9397d2..1e91af4 100644
--- a/tests/lindex.test
+++ b/tests/lindex.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 set minus -
 testConstraint testevalex [llength [info commands testevalex]]
diff --git a/tests/link.test b/tests/link.test
index 89e5aa2..a95f241 100644
--- a/tests/link.test
+++ b/tests/link.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testlink [llength [info commands testlink]]
 testConstraint testlinkarray [llength [info commands testlinkarray]]
@@ -28,7 +28,7 @@ foreach i {int real bool string} {
 
 test link-0.1 {leak test} {testlink} {
     interp create i
-    load {} Tcltest i
+    load {} tcl::test i
     i eval {
 	testlink create 1 0 0 0 0 0 0 0 0 0 0 0 0 0
 	namespace delete ::
diff --git a/tests/listObj.test b/tests/listObj.test
index ce6c978..1b7f848 100644
--- a/tests/listObj.test
+++ b/tests/listObj.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testobj [llength [info commands testobj]]
 
diff --git a/tests/load.test b/tests/load.test
index c79ddf4..f6e68b9 100644
--- a/tests/load.test
+++ b/tests/load.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Figure out what extension is used for shared libraries on this
 # platform.
@@ -78,7 +78,7 @@ test load-2.1 {basic loading, with guess for package name} \
 interp create -safe child
 test load-2.2 {loading into a safe interpreter, with package name conversion} \
 	[list $dll $loaded] {
-    load -lazy [file join $testDir pkgb$ext] pKgB child
+    load -lazy [file join $testDir pkgb$ext] pkgb child
     list [child eval pkgb_sub 44 13] [catch {child eval pkgb_unsafe} msg] $msg \
 	    [catch {pkgb_sub 12 10} msg2] $msg2
 } {31 1 {invalid command name "pkgb_unsafe"} 1 {invalid command name "pkgb_sub"}}
@@ -90,7 +90,7 @@ test load-2.3 {loading with no _Init procedure} -constraints [list $dll $loaded]
 		 {TCL LOOKUP LOAD_SYMBOL *Foo_Init}]
 test load-2.4 {loading with no _SafeInit procedure} [list $dll $loaded] {
     list [catch {load [file join $testDir pkga$ext] {} child} msg] $msg
-} {1 {can't use package in a safe interpreter: no Pkga_SafeInit procedure}}
+} {1 {can't use package in a safe interpreter: no pkga_SafeInit procedure}}
 
 test load-3.1 {error in _Init procedure, same interpreter} \
 	[list $dll $loaded] {
@@ -128,7 +128,7 @@ test load-4.2 {reloading package into same interpreter} -setup {
     catch {load [file join $testDir pkga$ext] pkga}
 } -constraints [list $dll $loaded] -returnCodes error -body {
     load [file join $testDir pkga$ext] pkgb
-} -result "file \"[file join $testDir pkga$ext]\" is already loaded for package \"Pkga\""
+} -result "file \"[file join $testDir pkga$ext]\" is already loaded for package \"pkga\""
 
 test load-5.1 {file name not specified and no static package: pick default} -setup {
     catch {interp delete x}
@@ -139,7 +139,7 @@ test load-5.1 {file name not specified and no static package: pick default} -set
     info loaded x
 } -cleanup {
     interp delete x
-} -result [list [list [file join $testDir pkga$ext] Pkga]]
+} -result [list [list [file join $testDir pkga$ext] pkga]]
 
 # On some platforms, like SunOS 4.1.3, these tests can't be run because
 # they cause the process to exit.
@@ -152,82 +152,82 @@ test load-6.1 {errors loading file} [list $dll $loaded] {
 
 test load-7.1 {Tcl_StaticPackage procedure} [list teststaticpkg] {
     set x "not loaded"
-    teststaticpkg Test 1 0
-    load {} Test
-    load {} Test child
+    teststaticpkg test 1 0
+    load {} test
+    load {} test child
     list [set x] [child eval set x]
 } {loaded loaded}
 test load-7.2 {Tcl_StaticPackage procedure} [list teststaticpkg] {
     set x "not loaded"
-    teststaticpkg Another 0 0
-    load {} Another
+    teststaticpkg another 0 0
+    load {} another
     child eval {set x "not loaded"}
-    list [catch {load {} Another child} msg] $msg \
+    list [catch {load {} another child} msg] $msg \
 	[child eval set x] [set x]
-} {1 {can't use package in a safe interpreter: no Another_SafeInit procedure} {not loaded} loaded}
+} {1 {can't use package in a safe interpreter: no another_SafeInit procedure} {not loaded} loaded}
 test load-7.3 {Tcl_StaticPackage procedure} [list teststaticpkg] {
     set x "not loaded"
-    teststaticpkg More 0 1
-    load {} More
+    teststaticpkg more 0 1
+    load {} more
     set x
 } {not loaded}
 catch {load [file join $testDir pkga$ext] pkga}
 catch {load [file join $testDir pkgb$ext] pkgb}
 catch {load [file join $testDir pkge$ext] pkge}
-set currentRealPackages [list [list [file join $testDir pkge$ext] Pkge] [list [file join $testDir pkgb$ext] Pkgb] [list [file join $testDir pkga$ext] Pkga]]
+set currentRealPackages [list [list [file join $testDir pkge$ext] pkge] [list [file join $testDir pkgb$ext] pkgb] [list [file join $testDir pkga$ext] pkga]]
 test load-7.4 {Tcl_StaticPackage procedure, redundant calls} -setup {
-    teststaticpkg Test 1 0
-    teststaticpkg Another 0 0
-    teststaticpkg More 0 1
+    teststaticpkg test 1 0
+    teststaticpkg another 0 0
+    teststaticpkg more 0 1
 } -constraints [list teststaticpkg $dll $loaded] -body {
-    teststaticpkg Double 0 1
-    teststaticpkg Double 0 1
+    teststaticpkg double 0 1
+    teststaticpkg double 0 1
     info loaded
-} -result [list {{} Double} {{} More} {{} Another} {{} Test} {*}$currentRealPackages {*}$alreadyTotalLoaded]
+} -result [list {{} double} {{} more} {{} another} {{} test} {*}$currentRealPackages {*}$alreadyTotalLoaded]
 
 testConstraint teststaticpkg_8.x 0
 if {[testConstraint teststaticpkg]} {
     catch {
-	teststaticpkg Test 1 1
-	teststaticpkg Another 0 1
-	teststaticpkg More 0 1
-	teststaticpkg Double 0 1
+	teststaticpkg test 1 1
+	teststaticpkg another 0 1
+	teststaticpkg more 0 1
+	teststaticpkg double 0 1
 	testConstraint teststaticpkg_8.x 1
     }
 }
 
 test load-8.1 {TclGetLoadedPackages procedure} [list teststaticpkg_8.x $dll $loaded] {
     lsort -index 1 [info loaded]
-} [lsort -index 1 [list {{} Double} {{} More} {{} Another} {{} Test} {*}$currentRealPackages {*}$alreadyTotalLoaded]]
+} [lsort -index 1 [list {{} double} {{} more} {{} another} {{} test} {*}$currentRealPackages {*}$alreadyTotalLoaded]]
 test load-8.2 {TclGetLoadedPackages procedure} -constraints {teststaticpkg_8.x} -body {
     info loaded gorp
 } -returnCodes error -result {could not find interpreter "gorp"}
 test load-8.3a {TclGetLoadedPackages procedure} [list teststaticpkg_8.x $dll $loaded] {
     lsort -index 1 [info loaded {}]
-} [lsort -index 1 [list {{} Double} {{} More} {{} Another} {{} Test} [list [file join $testDir pkga$ext] Pkga] [list [file join $testDir pkgb$ext] Pkgb] {*}$alreadyLoaded]]
+} [lsort -index 1 [list {{} double} {{} more} {{} another} {{} test} [list [file join $testDir pkga$ext] pkga] [list [file join $testDir pkgb$ext] pkgb] {*}$alreadyLoaded]]
 test load-8.3b {TclGetLoadedPackages procedure} [list teststaticpkg_8.x $dll $loaded] {
     lsort -index 1 [info loaded child]
-} [lsort -index 1 [list {{} Test} [list [file join $testDir pkgb$ext] Pkgb]]]
+} [lsort -index 1 [list {{} test} [list [file join $testDir pkgb$ext] pkgb]]]
 test load-8.4 {TclGetLoadedPackages procedure} [list teststaticpkg_8.x $dll $loaded] {
     load [file join $testDir pkgb$ext] pkgb
     list [lsort -index 1 [info loaded {}]] [lsort [info commands pkgb_*]]
-} [list [lsort -index 1 [concat [list [list [file join $testDir pkgb$ext] Pkgb] {{} Double} {{} More} {{} Another} {{} Test} [list [file join $testDir pkga$ext] Pkga]] $alreadyLoaded]] {pkgb_demo pkgb_sub pkgb_unsafe}]
+} [list [lsort -index 1 [concat [list [list [file join $testDir pkgb$ext] pkgb] {{} double} {{} more} {{} another} {{} test} [list [file join $testDir pkga$ext] pkga]] $alreadyLoaded]] {pkgb_demo pkgb_sub pkgb_unsafe}]
 interp delete child
 
 test load-9.1 {Tcl_StaticPackage, load already-loaded package into another interp} -setup {
     interp create child1
     interp create child2
-    load {} Tcltest child1
-    load {} Tcltest child2
+    load {} tcl::test child1
+    load {} tcl::test child2
 } -constraints {teststaticpkg} -body {
-    child1 eval { teststaticpkg Loadninepointone 0 1 }
-    child2 eval { teststaticpkg Loadninepointone 0 1 }
+    child1 eval { teststaticpkg loadninepointone 0 1 }
+    child2 eval { teststaticpkg loadninepointone 0 1 }
     list [child1 eval { info loaded {} }] \
 	[child2 eval { info loaded {} }]
 } -match glob -cleanup {
     interp delete child1
     interp delete child2
-} -result {{{{} Loadninepointone} {* Tcltest}} {{{} Loadninepointone} {* Tcltest}}}
+} -result {{{{} loadninepointone} {* tcl::test}} {{{} loadninepointone} {* tcl::test}}}
 
 test load-10.1 {load from vfs} -setup {
     set dir [pwd]
diff --git a/tests/lrange.test b/tests/lrange.test
index a20422f..0238504 100644
--- a/tests/lrange.test
+++ b/tests/lrange.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testpurebytesobj [llength [info commands testpurebytesobj]]
 
diff --git a/tests/lset.test b/tests/lset.test
index d98a38e..5c1a0d5 100644
--- a/tests/lset.test
+++ b/tests/lset.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 proc failTrace {name1 name2 op} {
     error "trace failed"
diff --git a/tests/main.test b/tests/main.test
index c7347b9..87e0a9a 100644
--- a/tests/main.test
+++ b/tests/main.test
@@ -11,12 +11,10 @@ namespace eval ::tcl::test::main {
     # Is [exec] defined?
     testConstraint exec [llength [info commands exec]]
 
-    # Is the Tcltest package loaded?
-    #	- that is, the special C-coded testing commands in tclTest.c
-    #   - tests use testing commands introduced in Tcltest 8.4
-    testConstraint Tcltest [expr {
-	[llength [package provide Tcltest]]
-	&& [package vsatisfies [package provide Tcltest] 8.5-]}]
+    # Is the tcl::test package loaded?
+    testConstraint tcl::test [expr {
+	[llength [package provide tcl::test]]
+	&& [package vsatisfies [package provide tcl::test] 8.5-]}]
 
     # Procedure to simulate interactive typing of commands, line by line
     proc type {chan script} {
@@ -192,7 +190,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-2.1 {
 	Tcl_Main: appInitProc returns error
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {puts "In script"} script
     } -body {
@@ -208,7 +206,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-2.2 {
 	Tcl_Main: appInitProc returns error
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {puts "In script"} -appinitprocerror >& result
 	set f [open result]
@@ -221,7 +219,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-2.3 {
 	Tcl_Main: appInitProc deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {puts "In script"} script
     } -body {
@@ -237,7 +235,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-2.4 {
 	Tcl_Main: appInitProc deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {puts "In script"} \
 		-appinitprocdeleteinterp >& result
@@ -251,7 +249,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-2.5 {
 	Tcl_Main: appInitProc closes stderr
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {puts "In script"} \
 		-appinitprocclosestderr >& result
@@ -336,7 +334,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-3.5 {
 	Tcl_Main: startup script sets main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {
 		rename exit _exit
@@ -364,7 +362,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-3.6 {
 	Tcl_Main: startup script sets main loop and closes stdin
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {
 		close stdin
@@ -393,7 +391,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-3.7 {
 	Tcl_Main: startup script deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {
 		rename exit _exit
@@ -417,7 +415,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-3.8 {
 	Tcl_Main: startup script deletes interp and sets mainloop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	makeFile {
 		testsetmainloop
@@ -461,7 +459,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-4.1 {
 	Tcl_Main: rcFile evaluation deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	set rc [makeFile {testinterpdelete {}} rc]
     } -body {
@@ -478,7 +476,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-4.2 {
 	Tcl_Main: rcFile evaluation closes stdin
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	set rc [makeFile {close stdin} rc]
     } -body {
@@ -495,7 +493,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-4.3 {
 	Tcl_Main: rcFile evaluation closes stdin and sets main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	set rc [makeFile {
 		close stdin
@@ -523,7 +521,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-4.4 {
 	Tcl_Main: rcFile evaluation sets main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	set rc [makeFile {
 		testsetmainloop
@@ -550,7 +548,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-4.5 {
         Tcl_Main: Bug 1481986
     } -constraints {
-        exec Tcltest
+        exec tcl::test
     } -setup {
         set rc [makeFile {
                 testsetmainloop
@@ -698,7 +696,7 @@ namespace eval ::tcl::test::main {
 	Tcl_Main: interactive mode: close stdin
 		-> main loop & [exit] & exit handlers
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		rename exit _exit
@@ -722,7 +720,7 @@ namespace eval ::tcl::test::main {
 	Tcl_Main: interactive mode: delete interp
 		-> main loop & exit handlers, but no [exit]
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		rename exit _exit
@@ -745,7 +743,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-5.10 {
 	Tcl_Main: exit main loop in mid-interactive command
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -setup {
 	catch {set f [open "|[list [interpreter]]" w+]}
 	catch {chan configure $f -blocking 0}
@@ -766,7 +764,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-5.11 {
 	Tcl_Main: EOF in interactive main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		rename exit _exit
@@ -788,7 +786,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-5.12 {
 	Tcl_Main: close stdin in interactive main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		rename exit _exit
@@ -841,7 +839,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-6.2 {
 	Tcl_Main: prompt deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		set tcl_prompt1 {testinterpdelete {}}
@@ -893,7 +891,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-6.5 {
 	Tcl_Main: interactive entry to main loop
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		set tcl_interactive 1
@@ -943,7 +941,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-7.1 {
 	Tcl_Main: [exit] defined as no-op -> still have exithandlers
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		proc exit args {}
@@ -959,7 +957,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-7.2 {
 	Tcl_Main: [exit] defined as no-op -> still have exithandlers
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		proc exit args {}
@@ -979,7 +977,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.1 {
 	StdinProc: handles non-blocking stdin
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -996,7 +994,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.2 {
 	StdinProc: handles stdin EOF
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1018,7 +1016,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.3 {
 	StdinProc: handles interactive stdin EOF
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1039,7 +1037,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.4 {
 	StdinProc: handles stdin close
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1062,7 +1060,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.5 {
 	StdinProc: handles interactive stdin close
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1086,7 +1084,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.6 {
 	StdinProc: handles event loop re-entry
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1105,7 +1103,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.7 {
 	StdinProc: handling of errors
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1122,7 +1120,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.8 {
 	StdinProc: handling of errors, closed stderr
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1140,7 +1138,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.9 {
 	StdinProc: interactive output
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1156,7 +1154,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.10 {
 	StdinProc: interactive output, closed stdout
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1174,7 +1172,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.11 {
 	StdinProc: prompt deletes interp
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1190,7 +1188,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.12 {
 	StdinProc: prompt closes stdin
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
@@ -1209,7 +1207,7 @@ namespace eval ::tcl::test::main {
     test Tcl_Main-8.13 {
 	Bug 1775878
     } -constraints {
-	exec Tcltest
+	exec tcl::test
     } -body {
 	exec [interpreter] << "testsetmainloop\nputs \\\npwd\ntestexitmainloop" >& result
 	set f [open result]
diff --git a/tests/misc.test b/tests/misc.test
index 8f8516e..431fa19 100644
--- a/tests/misc.test
+++ b/tests/misc.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testhashsystemhash [llength [info commands testhashsystemhash]]
 
diff --git a/tests/namespace.test b/tests/namespace.test
index 8209cf3..2caf1c4 100644
--- a/tests/namespace.test
+++ b/tests/namespace.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 testConstraint memory [llength [info commands memory]]
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 #
 # REMARK: the tests for 'namespace upvar' are not done here. They are to be
diff --git a/tests/notify.test b/tests/notify.test
index 7375f83..d83a5b8 100644
--- a/tests/notify.test
+++ b/tests/notify.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testevent [llength [info commands testevent]]
 
diff --git a/tests/nre.test b/tests/nre.test
index 7cf06d1..aec188c 100644
--- a/tests/nre.test
+++ b/tests/nre.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testnrelevels [llength [info commands testnrelevels]]
 
diff --git a/tests/obj.test b/tests/obj.test
index e10cebf..66005f6 100644
--- a/tests/obj.test
+++ b/tests/obj.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testobj [llength [info commands testobj]]
 testConstraint longIs32bit [expr {$tcl_platform(wordSize) == 4}]
diff --git a/tests/oo.test b/tests/oo.test
index b8ae30d..eb90aea 100644
--- a/tests/oo.test
+++ b/tests/oo.test
@@ -7,7 +7,7 @@
 # See the file "license.terms" for information on usage and redistribution of
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-package require TclOO 1.0.3
+package require tcl::oo 1.0.3
 if {"::tcltest" ni [namespace children]} {
     package require tcltest 2.5
     namespace import -force ::tcltest::*
@@ -38,14 +38,14 @@ if {[testConstraint memory]} {
 test oo-0.1 {basic test of OO's ability to clean up its initial state} {
     interp create t
     t eval {
-	package require TclOO
+	package require tcl::oo
     }
     interp delete t
 } {}
 test oo-0.2 {basic test of OO's ability to clean up its initial state} {
     set i [interp create]
     interp eval $i {
-	package require TclOO
+	package require tcl::oo
 	namespace delete ::
     }
     interp delete $i
@@ -79,7 +79,7 @@ test oo-0.6 {cleaning the core class pair; way #1} -setup {
     interp create t
 } -body {
     t eval {
-	package require TclOO
+	package require tcl::oo
 	namespace path oo
 	list [catch {class destroy} m] $m [catch {object destroy} m] $m
     }
@@ -90,7 +90,7 @@ test oo-0.7 {cleaning the core class pair; way #2} -setup {
     interp create t
 } -body {
     t eval {
-	package require TclOO
+	package require tcl::oo
 	namespace path oo
 	list [catch {object destroy} m] $m [catch {class destroy} m] $m
     }
@@ -109,10 +109,10 @@ test oo-0.8 {leak in variable management} -setup {
 } -cleanup {
     foo destroy
 } -result 0
-test oo-0.9 {various types of presence of the TclOO package} {
-    list [lsearch -nocase -all -inline [package names] tcloo] \
-	[package present TclOO] [expr {$::oo::patchlevel in [package versions TclOO]}]
-} [list TclOO $::oo::patchlevel 1]
+test oo-0.9 {various types of presence of the tcl::oo package} {
+    list [lsearch -nocase -all -inline [package names] tcl::oo] \
+	[package present tcl::oo] [expr {$::oo::patchlevel in [package versions tcl::oo]}]
+} [list tcl::oo $::oo::patchlevel 1]
 
 test oo-1.1 {basic test of OO functionality: no classes} {
     set result {}
@@ -383,7 +383,7 @@ test oo-2.1 {basic test of OO functionality: constructor} -setup {
     # we're modifying the root object class's constructor
     interp create subinterp
     subinterp eval {
-	package require TclOO
+	package require tcl::oo
     }
 } -body {
     subinterp eval {
@@ -514,7 +514,7 @@ test oo-3.1 {basic test of OO functionality: destructor} -setup {
     # modifying the root object class's constructor
     interp create subinterp
     subinterp eval {
-	package require TclOO
+	package require tcl::oo
     }
 } -body {
     subinterp eval {
@@ -534,7 +534,7 @@ test oo-3.2 {basic test of OO functionality: destructor} -setup {
     # we're modifying the root object class's constructor
     interp create subinterp
     subinterp eval {
-	package require TclOO
+	package require tcl::oo
     }
 } -body {
     subinterp eval {
diff --git a/tests/ooNext2.test b/tests/ooNext2.test
index 0ec7cdd..6c12962 100644
--- a/tests/ooNext2.test
+++ b/tests/ooNext2.test
@@ -7,7 +7,7 @@
 # See the file "license.terms" for information on usage and redistribution of
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-package require TclOO 1.0.3
+package require tcl::oo 1.0.3
 if {"::tcltest" ni [namespace children]} {
     package require tcltest 2.5
     namespace import -force ::tcltest::*
diff --git a/tests/ooUtil.test b/tests/ooUtil.test
index 7fc9b9c..606b625 100644
--- a/tests/ooUtil.test
+++ b/tests/ooUtil.test
@@ -9,7 +9,7 @@
 # See the file "license.terms" for information on usage and redistribution of
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-package require TclOO 1.0.3
+package require tcl::oo 1.0.3
 if {"::tcltest" ni [namespace children]} {
     package require tcltest 2.5
     namespace import -force ::tcltest::*
diff --git a/tests/package.test b/tests/package.test
index 1223d82..278947a 100644
--- a/tests/package.test
+++ b/tests/package.test
@@ -18,12 +18,12 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Do all this in a child interp to avoid garbaging the package list
 set i [interp create]
 tcltest::loadIntoChildInterpreter $i {*}$argv
-catch [list load {} Tcltest $i]
+catch [list load {} tcl::test $i]
 interp eval $i {
 namespace import -force ::tcltest::*
 #package forget {*}[package names]
@@ -577,7 +577,7 @@ test package-3.44 {Tcl_PkgRequire: exact version matching (1578344)} -setup {
 } -result {version conflict for package "demo": have 1.2.3, need exactly 1.2}
 test package-3.50 {Tcl_PkgRequire procedure, picking best stable version} -constraints testpreferstable -setup {
     interp create child
-    load {} Tcltest child
+    load {} tcl::test child
     child eval {
     testpreferstable
     package forget t
@@ -1340,7 +1340,7 @@ proc prefer {args} {
 
 test package-13.0 {package prefer defaults} -body {
     prefer
-} -result [expr {[string match {*[ab]*} [package provide Tcl]] ? "latest" : "stable"}]
+} -result [expr {[string match {*[ab]*} [package provide tcl]] ? "latest" : "stable"}]
 test package-13.1 {package prefer defaults} -body {
     set ::env(TCL_PKG_PREFER_LATEST) stable	;# value not relevant!
     prefer
diff --git a/tests/parse.test b/tests/parse.test
index 0786478..0203c56 100644
--- a/tests/parse.test
+++ b/tests/parse.test
@@ -17,7 +17,7 @@ namespace eval ::tcl::test::parse {
     namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testparser [llength [info commands testparser]]
 testConstraint testbytestring [llength [info commands testbytestring]]
@@ -1051,7 +1051,7 @@ test parse-19.1 {Bug 1115904: recursion limit in Tcl_EvalEx} -constraints {
     testevalex
 } -setup {
     interp create i
-    load {} Tcltest i
+    load {} tcl::test i
     i eval {proc {} args {}}
     interp recursionlimit i 3
 } -body {
@@ -1064,7 +1064,7 @@ test parse-19.2 {Bug 1115904: recursion limit in Tcl_EvalEx} -constraints {
     testevalex
 } -setup {
     interp create i
-    load {} Tcltest i
+    load {} tcl::test i
     i eval {proc {} args {}}
     interp recursionlimit i 2
 } -body {
diff --git a/tests/parseExpr.test b/tests/parseExpr.test
index 8b5e429..3fbd14e 100644
--- a/tests/parseExpr.test
+++ b/tests/parseExpr.test
@@ -14,7 +14,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Note that the Tcl expression parser (tclCompExpr.c) does not check
 # the semantic validity of the expressions it parses. It does not check,
diff --git a/tests/parseOld.test b/tests/parseOld.test
index 7218092..ede80d1 100644
--- a/tests/parseOld.test
+++ b/tests/parseOld.test
@@ -19,7 +19,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testwordend [llength [info commands testwordend]]
 testConstraint testbytestring [llength [info commands testbytestring]]
diff --git a/tests/pkgMkIndex.test b/tests/pkgMkIndex.test
index ad328f8..2d62631 100644
--- a/tests/pkgMkIndex.test
+++ b/tests/pkgMkIndex.test
@@ -559,8 +559,8 @@ testConstraint $dll [file exists $x]
 
 if {[testConstraint $dll]} {
     makeFile {
-#  This package provides Pkga, which is also provided by a DLL.
-package provide Pkga 1.0
+#  This package provides pkga, which is also provided by a DLL.
+package provide pkga 1.0
 proc pkga_neq { x } {
     return [expr {! [pkgq_eq $x]}]
 }
@@ -576,7 +576,7 @@ test pkgMkIndex-10.1 {package in DLL and script} [list exec $dll] {
     set cmd [list pkg_mkIndex -lazy $fullPkgPath [file tail $x] pkga.tcl]
     exec [interpreter] << $cmd
     pkgtest::runCreatedIndex {0 {}} -lazy $fullPkgPath pkga[info sharedlibextension] pkga.tcl
-} "0 {{Pkga:1.0 {tclPkgSetup {pkga[info sharedlibextension] load {pkga_eq pkga_quote}} {pkga.tcl source pkga_neq}}}}"
+} "0 {{pkga:1.0 {tclPkgSetup {pkga[info sharedlibextension] load {pkga_eq pkga_quote}} {pkga.tcl source pkga_neq}}}}"
 test pkgMkIndex-10.2 {package in DLL hidden by -load} [list exec $dll] {
     # Do all [load]ing of shared libraries in another process, so we can
     # delete the file and not get stuck because we're holding a reference to
diff --git a/tests/platform.test b/tests/platform.test
index fff16fd..bdc9995 100644
--- a/tests/platform.test
+++ b/tests/platform.test
@@ -21,7 +21,7 @@ namespace eval ::tcl::test::platform {
     namespace upvar :: tcl_platform tcl_platform
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 package require tcltests
 
 testConstraint testCPUID [llength [info commands testcpuid]]
diff --git a/tests/proc.test b/tests/proc.test
index 4b539c4..e102681 100644
--- a/tests/proc.test
+++ b/tests/proc.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 
-testConstraint procbodytest [expr {![catch {package require procbodytest}]}]
+testConstraint tcl::test [expr {![catch {package require tcl::test}]}]
 testConstraint memory	    [llength [info commands memory]]
 
 catch {namespace delete {*}[namespace children :: test_ns_*]}
@@ -210,14 +210,14 @@ catch {rename p ""}
 catch {rename t ""}
 
 # Note that the test require that procedures whose body is used to create
-# procbody objects must be executed before the procbodytest::proc command is
+# procbody objects must be executed before the tcl::procbodytest::proc command is
 # executed, so that the Proc struct is populated correctly (CompiledLocals are
 # added at compile time).
 
-test proc-4.1 {TclCreateProc, procbody obj} -constraints procbodytest -body {
+test proc-4.1 {TclCreateProc, procbody obj} -constraints tcl::test -body {
     proc p x {return "$x:$x"}
     set rv [p P]
-    procbodytest::proc t x p
+    tcl::procbodytest::proc t x p
     lappend rv [t T]
 } -cleanup {
     catch {rename p ""}
@@ -229,9 +229,9 @@ test proc-4.2 {TclCreateProc, procbody obj, use compiled locals} -body {
 	return "$x:$y"
     }
     set rv [p P]
-    procbodytest::proc t x p
+    tcl::procbodytest::proc t x p
     lappend rv [t T]
-} -constraints procbodytest -cleanup {
+} -constraints tcl::test -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {P:p T:t}
@@ -241,9 +241,9 @@ test proc-4.3 {TclCreateProc, procbody obj, too many args} -body {
 	return "$x:$y"
     }
     set rv [p P]
-    procbodytest::proc t {x x1 x2} p
+    tcl::procbodytest::proc t {x x1 x2} p
     lappend rv [t T]
-} -constraints procbodytest -returnCodes error -cleanup {
+} -constraints tcl::test -returnCodes error -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {procedure "t": arg list contains 3 entries, precompiled header expects 1}
@@ -254,9 +254,9 @@ test proc-4.4 {TclCreateProc, procbody obj, inconsistent arg name} -body {
 	return "$v:$w"
     }
     set rv [p P Q R]
-    procbodytest::proc t {x x1 z} p
+    tcl::procbodytest::proc t {x x1 z} p
     lappend rv [t S T U]
-} -constraints procbodytest -returnCodes error -cleanup {
+} -constraints tcl::test -returnCodes error -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {procedure "t": formal parameter 1 is inconsistent with precompiled body}
@@ -267,9 +267,9 @@ test proc-4.5 {TclCreateProc, procbody obj, inconsistent arg default type} -body
 	return "$v:$w"
     }
     set rv [p P Q R]
-    procbodytest::proc t {x y z} p
+    tcl::procbodytest::proc t {x y z} p
     lappend rv [t S T U]
-} -constraints procbodytest -returnCodes error -cleanup {
+} -constraints tcl::test -returnCodes error -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {procedure "t": formal parameter 2 is inconsistent with precompiled body}
@@ -280,9 +280,9 @@ test proc-4.6 {TclCreateProc, procbody obj, inconsistent arg default type} -body
 	return "$v:$w"
     }
     set rv [p P Q R]
-    procbodytest::proc t {x y {z Z}} p
+    tcl::procbodytest::proc t {x y {z Z}} p
     lappend rv [t S T U]
-} -returnCodes error -constraints procbodytest -cleanup {
+} -returnCodes error -constraints tcl::test -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {procedure "t": formal parameter 2 is inconsistent with precompiled body}
@@ -293,9 +293,9 @@ test proc-4.7 {TclCreateProc, procbody obj, inconsistent arg default value} -bod
 	return "$v:$w"
     }
     set rv [p P Q R]
-    procbodytest::proc t {x y {z ZZ}} p
+    tcl::procbodytest::proc t {x y {z ZZ}} p
     lappend rv [t S T U]
-} -constraints procbodytest -returnCodes error -cleanup {
+} -constraints tcl::test -returnCodes error -cleanup {
     catch {rename p ""}
     catch {rename t ""}
 } -result {procedure "t": formal parameter "z" has default value inconsistent with precompiled body}
@@ -309,10 +309,10 @@ test proc-4.8 {TclCreateProc, procbody obj, no leak on multiple iterations} -set
 	return "$x:$y"
     }
     px x
-} -constraints {procbodytest memory} -body {
+} -constraints {tcl::test memory} -body {
     set end [getbytes]
     for {set i 0} {$i < 5} {incr i} {
-	procbodytest::proc tx x px
+	tcl::procbodytest::proc tx x px
 	set tmp $end
 	set end [getbytes]
     }
@@ -321,8 +321,8 @@ test proc-4.8 {TclCreateProc, procbody obj, no leak on multiple iterations} -set
     rename getbytes {}
     unset -nocomplain end i tmp leakedBytes
 } -result 0
-test proc-4.9 {[39fed4dae5] Valid Tcl_PkgPresent return} procbodytest {
-    procbodytest::check
+test proc-4.9 {[39fed4dae5] Valid Tcl_PkgPresent return} tcl::test {
+    tcl::procbodytest::check
 } 1
 
 test proc-5.1 {Bytecompiling noop; test for correct argument substitution} -body {
diff --git a/tests/reg.test b/tests/reg.test
index 847da32..add8e91 100644
--- a/tests/reg.test
+++ b/tests/reg.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # All tests require the testregexp command, return if this
 # command doesn't exist
diff --git a/tests/rename.test b/tests/rename.test
index ddda909..702a6d0 100644
--- a/tests/rename.test
+++ b/tests/rename.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testdel [llength [info commands testdel]]
 
diff --git a/tests/resolver.test b/tests/resolver.test
index 9916529..8693cdc 100644
--- a/tests/resolver.test
+++ b/tests/resolver.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testinterpresolver [llength [info commands testinterpresolver]]
 
diff --git a/tests/result.test b/tests/result.test
index f1f5fb7..7790578 100644
--- a/tests/result.test
+++ b/tests/result.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Some tests require the testsaveresult command
 
diff --git a/tests/safe-zipfs.test b/tests/safe-zipfs.test
index 73703e4..bbae4ba 100644
--- a/tests/safe-zipfs.test
+++ b/tests/safe-zipfs.test
@@ -13,8 +13,6 @@
 # See the file "license.terms" for information on usage and redistribution of
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-package require Tcl 8.5-
-
 if {"::tcltest" ni [namespace children]} {
     package require tcltest 2.5
     namespace import -force ::tcltest::*
@@ -53,10 +51,10 @@ proc mapAndSortList {map listIn} {
 # thus un-autoindexed) APIs in this test result arguments:
 catch {safe::interpConfigure}
 
-# testing that nested and statics do what is advertised (we use a static
-# package - Tcltest - but it might be absent if we're in standard tclsh)
+# testing that nested and statics do what is advertised (we use a
+# package - tcl::test - but it might be absent if we're in standard tclsh)
 
-testConstraint TcltestPackage [expr {![catch {package require Tcltest}]}]
+testConstraint tcl::test [expr {![catch {package require tcl::test}]}]
 
 # Tests 5.* test the example files before using them to test safe interpreters.
 
diff --git a/tests/safe.test b/tests/safe.test
index 1177e19..6e5afc4 100644
--- a/tests/safe.test
+++ b/tests/safe.test
@@ -54,9 +54,9 @@ proc mapAndSortList {map listIn} {
 catch {safe::interpConfigure}
 
 # testing that nested and statics do what is advertised (we use a static
-# package - Tcltest - but it might be absent if we're in standard tclsh)
+# package - tcl::test - but it might be absent if we're in standard tclsh)
 
-testConstraint TcltestPackage [expr {![catch {package require Tcltest}]}]
+testConstraint tcl::test [expr {![catch {package require tcl::test}]}]
 
 test safe-1.1 {safe::interpConfigure syntax} -returnCodes error -body {
     safe::interpConfigure
@@ -1158,14 +1158,14 @@ test safe-9.24 {interpConfigure change the access path; check module loading; st
 # See comments on lsort after test safe-9.20.
 
 catch {teststaticpkg Safepkg1 0 0}
-test safe-10.1 {testing statics loading} -constraints TcltestPackage -setup {
+test safe-10.1 {testing statics loading} -constraints tcl::test -setup {
     set i [safe::interpCreate]
 } -body {
     interp eval $i {load {} Safepkg1}
 } -returnCodes error -cleanup {
     safe::interpDelete $i
 } -result {load of binary library for package Safepkg1 failed: can't use package in a safe interpreter: no Safepkg1_SafeInit procedure}
-test safe-10.1.1 {testing statics loading} -constraints TcltestPackage -setup {
+test safe-10.1.1 {testing statics loading} -constraints tcl::test -setup {
     set i [safe::interpCreate]
 } -body {
     catch {interp eval $i {load {} Safepkg1}} m o
@@ -1178,7 +1178,7 @@ test safe-10.1.1 {testing statics loading} -constraints TcltestPackage -setup {
 "load {} Safepkg1"
     invoked from within
 "interp eval $i {load {} Safepkg1}"}
-test safe-10.2 {testing statics loading / -nostatics} -constraints TcltestPackage -body {
+test safe-10.2 {testing statics loading / -nostatics} -constraints tcl::test -body {
     set i [safe::interpCreate -nostatics]
     interp eval $i {load {} Safepkg1}
 } -returnCodes error -cleanup {
@@ -1186,18 +1186,18 @@ test safe-10.2 {testing statics loading / -nostatics} -constraints TcltestPackag
 } -result {permission denied (static package)}
 test safe-10.3 {testing nested statics loading / no nested by default} -setup {
     set i [safe::interpCreate]
-} -constraints TcltestPackage -body {
+} -constraints tcl::test -body {
     interp eval $i {interp create x; load {} Safepkg1 x}
 } -returnCodes error -cleanup {
     safe::interpDelete $i
 } -result {permission denied (nested load)}
-test safe-10.4 {testing nested statics loading / -nestedloadok} -constraints TcltestPackage -body {
+test safe-10.4 {testing nested statics loading / -nestedloadok} -constraints tcl::test -body {
     set i [safe::interpCreate -nestedloadok]
     interp eval $i {interp create x; load {} Safepkg1 x}
 } -returnCodes error -cleanup {
     safe::interpDelete $i
 } -result {load of binary library for package Safepkg1 failed: can't use package in a safe interpreter: no Safepkg1_SafeInit procedure}
-test safe-10.4.1 {testing nested statics loading / -nestedloadok} -constraints TcltestPackage -body {
+test safe-10.4.1 {testing nested statics loading / -nestedloadok} -constraints tcl::test -body {
     set i [safe::interpCreate -nestedloadok]
     catch {interp eval $i {interp create x; load {} Safepkg1 x}} m o
     dict get $o -errorinfo
diff --git a/tests/set.test b/tests/set.test
index 303c2d7..30c6c6d 100644
--- a/tests/set.test
+++ b/tests/set.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testset2 [llength [info commands testset2]]
 
diff --git a/tests/socket.test b/tests/socket.test
index 759008f..82f5968 100644
--- a/tests/socket.test
+++ b/tests/socket.test
@@ -66,7 +66,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 ::tcltest::loadTestedCommands
 
 if {[info exists ::env(TRAVIS_OSX_IMAGE)] && [string match xcode* $::env(TRAVIS_OSX_IMAGE)]} {
diff --git a/tests/string.test b/tests/string.test
index 4817bec..d03ac67 100644
--- a/tests/string.test
+++ b/tests/string.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Helper commands to test various optimizations, code paths, and special cases.
 proc makeByteArray {s} {binary format a* $s}
diff --git a/tests/stringObj.test b/tests/stringObj.test
index ca6c323..ed43924 100644
--- a/tests/stringObj.test
+++ b/tests/stringObj.test
@@ -18,7 +18,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testobj [llength [info commands testobj]]
 testConstraint testbytestring [llength [info commands testbytestring]]
diff --git a/tests/subst.test b/tests/subst.test
index 4361d95..635177c 100644
--- a/tests/subst.test
+++ b/tests/subst.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testbytestring [llength [info commands testbytestring]]
 
diff --git a/tests/tailcall.test b/tests/tailcall.test
index 3704333..10945db 100644
--- a/tests/tailcall.test
+++ b/tests/tailcall.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testnrelevels [llength [info commands testnrelevels]]
 
diff --git a/tests/thread.test b/tests/thread.test
index 0a35d1b..262192b 100644
--- a/tests/thread.test
+++ b/tests/thread.test
@@ -20,7 +20,7 @@ if {"::tcltest" ni [namespace children]} {
 #  be fully finalized, which avoids valgrind "still reachable" reports.
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 package require tcltests
 
 # Some tests require the testthread command
diff --git a/tests/trace.test b/tests/trace.test
index c1e1a24..1bf3bdf 100644
--- a/tests/trace.test
+++ b/tests/trace.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testcmdtrace [llength [info commands testcmdtrace]]
 testConstraint testevalobjv [llength [info commands testevalobjv]]
diff --git a/tests/unixFCmd.test b/tests/unixFCmd.test
index 1ecaeef..ebc55dc 100644
--- a/tests/unixFCmd.test
+++ b/tests/unixFCmd.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testchmod [llength [info commands testchmod]]
 
diff --git a/tests/unixFile.test b/tests/unixFile.test
index 492e5d0..2ba758b 100644
--- a/tests/unixFile.test
+++ b/tests/unixFile.test
@@ -15,7 +15,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testfindexecutable [llength [info commands testfindexecutable]]
 
diff --git a/tests/unload.test b/tests/unload.test
index 815ff31..ca007ef 100644
--- a/tests/unload.test
+++ b/tests/unload.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Figure out what extension is used for shared libraries on this
 # platform.
@@ -135,17 +135,17 @@ child eval {
     set pkgua_detached {}
     set pkgua_unloaded {}
 }
-test unload-3.1 {basic loading of non-unloadable package in a safe interpreter, with package name conversion} \
+test unload-3.1 {basic loading of non-unloadable package in a safe interpreter} \
 	[list $dll $loaded] {
     catch {rename pkgb_sub {}}
-    load [file join $testDir pkgb$ext] pKgB child
+    load [file join $testDir pkgb$ext] pkgb child
     list [child eval pkgb_sub 44 13] [catch {child eval pkgb_unsafe} msg] $msg \
          [catch {pkgb_sub 12 10} msg2] $msg2
 } {31 1 {invalid command name "pkgb_unsafe"} 1 {invalid command name "pkgb_sub"}}
-test unload-3.2 {basic loading of unloadable package in a safe interpreter, with package name conversion} \
+test unload-3.2 {basic loading of unloadable package in a safe interpreter} \
 	[list $dll $loaded] {
     list [child eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}] \
-	    [load [file join $testDir pkgua$ext] pKgUA child] \
+	    [load [file join $testDir pkgua$ext] pkgua child] \
 	    [child eval pkgua_eq abc def] \
 	    [lsort [child eval info commands pkgua_*]] \
 	    [child eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}]
@@ -157,7 +157,7 @@ test unload-3.3 {unloading of a package that has never been loaded from a safe i
 } -result {file "*" has never been loaded in this interpreter}
 test unload-3.4 {basic unloading of a non-unloadable package from a safe interpreter, with guess for package name} -setup {
     if {[lsearch -index 1 [info loaded child] Pkgb] < 0} {
-	load [file join $testDir pkgb$ext] pKgB child
+	load [file join $testDir pkgb$ext] pkgb child
     }
 } -constraints [list $dll $loaded] -returnCodes error -match glob -body {
     unload [file join $testDir pkgb$ext] {} child
@@ -218,7 +218,7 @@ test unload-4.1 {loading of unloadable package in trusted interpreter, with gues
 	    [list $pkgua_loaded $pkgua_detached $pkgua_unloaded]
 } -result {{{} {} {}} {} 0 {pkgua_eq pkgua_quote} {. {} {}}}
 ## Load package in child-safe interpreter...
-test unload-4.2 {basic loading of unloadable package in a safe interpreter, with package name conversion} -setup {
+test unload-4.2 {basic loading of unloadable package in a safe interpreter} -setup {
     child eval {
 	set pkgua_loaded ""
 	set pkgua_detached ""
@@ -227,17 +227,17 @@ test unload-4.2 {basic loading of unloadable package in a safe interpreter, with
     incr load(C)
 } -constraints [list $dll $loaded] -body {
     list [child eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}] \
-	    [load [file join $testDir pkgua$ext] pKgUA child] \
+	    [load [file join $testDir pkgua$ext] pkgua child] \
 	    [child eval pkgua_eq abc def] \
 	    [lsort [child eval info commands pkgua_*]] \
 	    [child eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}]
 } -result {{{} {} {}} {} 0 {pkgua_eq pkgua_quote} {. {} {}}}
 ## Load package in child-trusted interpreter...
-test unload-4.3 {basic loading of unloadable package in a second trusted interpreter, with package name conversion} -setup {
+test unload-4.3 {basic loading of unloadable package in a second trusted interpreter} -setup {
     incr load(T)
 } -constraints [list $dll $loaded] -body {
     list [child-trusted eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}] \
-	    [load [file join $testDir pkgua$ext] pkguA child-trusted] \
+	    [load [file join $testDir pkgua$ext] pkgua child-trusted] \
 	    [child-trusted eval pkgua_eq abc def] \
 	    [lsort [child-trusted eval info commands pkgua_*]] \
 	    [child-trusted eval {list $pkgua_loaded $pkgua_detached $pkgua_unloaded}]
diff --git a/tests/upvar.test b/tests/upvar.test
index 9e44a79..170721f 100644
--- a/tests/upvar.test
+++ b/tests/upvar.test
@@ -17,7 +17,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testupvar [llength [info commands testupvar]]
 
diff --git a/tests/utf.test b/tests/utf.test
index 935830c..eacff20 100644
--- a/tests/utf.test
+++ b/tests/utf.test
@@ -14,7 +14,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint ucs2 [expr {[format %c 0x010000] eq "\uFFFD"}]
 testConstraint fullutf [expr {[format %c 0x010000] ne "\uFFFD"}]
diff --git a/tests/util.test b/tests/util.test
index d8e5507..9dadcb9 100644
--- a/tests/util.test
+++ b/tests/util.test
@@ -13,7 +13,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint controversialNaN 1
 testConstraint testbytestring [llength [info commands testbytestring]]
diff --git a/tests/var.test b/tests/var.test
index 19b7703..f326616 100644
--- a/tests/var.test
+++ b/tests/var.test
@@ -20,7 +20,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testupvar [llength [info commands testupvar]]
 testConstraint testgetvarfullname [llength [info commands testgetvarfullname]]
diff --git a/tests/winDde.test b/tests/winDde.test
index d2fb8a0..9f2423b 100644
--- a/tests/winDde.test
+++ b/tests/winDde.test
@@ -14,7 +14,7 @@ if {"::tcltest" ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 
-testConstraint debug [::tcl::pkgconfig get debug]
+testConstraint debug [expr {"debug" in [split [package provide Tcl] .]}]
 testConstraint dde 0
 if {[testConstraint win]} {
     if {![catch {
diff --git a/tests/winFCmd.test b/tests/winFCmd.test
index 70db379..c390de3 100644
--- a/tests/winFCmd.test
+++ b/tests/winFCmd.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 # Initialise the test constraints
 
diff --git a/tests/winFile.test b/tests/winFile.test
index 2c0988a..07bee07 100644
--- a/tests/winFile.test
+++ b/tests/winFile.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testvolumetype [llength [info commands testvolumetype]]
 testConstraint notNTFS 0
diff --git a/tests/winNotify.test b/tests/winNotify.test
index 0433b4a..05682b4 100644
--- a/tests/winNotify.test
+++ b/tests/winNotify.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testeventloop [expr {[info commands testeventloop] != {}}]
 
diff --git a/tests/winPipe.test b/tests/winPipe.test
index 919e336..9680dab 100644
--- a/tests/winPipe.test
+++ b/tests/winPipe.test
@@ -20,8 +20,8 @@ unset -nocomplain path
 
 catch {
     ::tcltest::loadTestedCommands
-    package require -exact Tcltest [info patchlevel]
-    set ::tcltestlib [lindex [package ifneeded Tcltest [info patchlevel]] 1]
+    package require -exact tcl::test [info patchlevel]
+    set ::tcltestlib [lindex [package ifneeded tcl::test [info patchlevel]] 1]
 }
 
 set org_pwd [pwd]
@@ -203,7 +203,7 @@ test winpipe-4.1 {Tcl_WaitPid} {win exec cat32} {
 test winpipe-4.2 {Tcl_WaitPid: return of exception codes, SIGFPE} {win exec testexcept notWine} {
     set f [open "|[list [interpreter]]" w+]
     set pid [pid $f]
-    puts $f "load $::tcltestlib Tcltest"
+    puts $f "load $::tcltestlib tcl::test"
     puts $f "testexcept float_underflow"
     set status [catch {close $f}]
     list $status [expr {$pid == [lindex $::errorCode 1]}] [lindex $::errorCode 2]
@@ -211,7 +211,7 @@ test winpipe-4.2 {Tcl_WaitPid: return of exception codes, SIGFPE} {win exec test
 test winpipe-4.3 {Tcl_WaitPid: return of exception codes, SIGSEGV} {win exec testexcept notWine} {
     set f [open "|[list [interpreter]]" w+]
     set pid [pid $f]
-    puts $f "load $::tcltestlib Tcltest"
+    puts $f "load $::tcltestlib tcl::test"
     puts $f "testexcept access_violation"
     set status [catch {close $f}]
     list $status [expr {$pid == [lindex $::errorCode 1]}] [lindex $::errorCode 2]
@@ -219,7 +219,7 @@ test winpipe-4.3 {Tcl_WaitPid: return of exception codes, SIGSEGV} {win exec tes
 test winpipe-4.4 {Tcl_WaitPid: return of exception codes, SIGILL} {win exec testexcept notWine} {
     set f [open "|[list [interpreter]]" w+]
     set pid [pid $f]
-    puts $f "load $::tcltestlib Tcltest"
+    puts $f "load $::tcltestlib tcl::test"
     puts $f "testexcept illegal_instruction"
     set status [catch {close $f}]
     list $status [expr {$pid == [lindex $::errorCode 1]}] [lindex $::errorCode 2]
@@ -227,7 +227,7 @@ test winpipe-4.4 {Tcl_WaitPid: return of exception codes, SIGILL} {win exec test
 test winpipe-4.5 {Tcl_WaitPid: return of exception codes, SIGINT} {win exec testexcept notWine} {
     set f [open "|[list [interpreter]]" w+]
     set pid [pid $f]
-    puts $f "load $::tcltestlib Tcltest"
+    puts $f "load $::tcltestlib tcl::test"
     puts $f "testexcept ctrl+c"
     set status [catch {close $f}]
     list $status [expr {$pid == [lindex $::errorCode 1]}] [lindex $::errorCode 2]
diff --git a/tests/winTime.test b/tests/winTime.test
index 19e4c58..c03e316 100644
--- a/tests/winTime.test
+++ b/tests/winTime.test
@@ -16,7 +16,7 @@ if {"::tcltest" ni [namespace children]} {
 }
 
 ::tcltest::loadTestedCommands
-catch [list package require -exact Tcltest [info patchlevel]]
+catch [list package require -exact tcl::test [info patchlevel]]
 
 testConstraint testwinclock [llength [info commands testwinclock]]
 testConstraint knownMsvcBug [expr {![info exists ::env(TRAVIS_OS_NAME)] || ![string match windows $::env(TRAVIS_OS_NAME)]}]
diff --git a/tests/zipfs.test b/tests/zipfs.test
index 017193b..55654e4 100644
--- a/tests/zipfs.test
+++ b/tests/zipfs.test
@@ -31,7 +31,7 @@ set tmpdir  [file join $CWD tmp]
 file mkdir $tmpdir
 
 test zipfs-0.0 {zipfs basics} -constraints zipfs -body {
-    package require zipfs
+    package require tcl::zipfs
 } -result {2.0}
 test zipfs-0.1 {zipfs basics} -constraints zipfs -body {
     expr {${ziproot} in [file volumes]}
diff --git a/tests/zlib.test b/tests/zlib.test
index 7ddf1d7..47dc7f0 100644
--- a/tests/zlib.test
+++ b/tests/zlib.test
@@ -34,7 +34,7 @@ test zlib-1.3 {zlib basics} -constraints zlib -body {
     zlib::pkgconfig list
 } -result zlibVersion
 test zlib-1.4 {zlib basics} -constraints zlib -body {
-    package present zlib
+    package present tcl::zlib
 } -result 2.0.1
 
 test zlib-2.1 {zlib compress/decompress} zlib {
diff --git a/unix/dltest/pkga.c b/unix/dltest/pkga.c
index b2267a7..c2d814f 100644
--- a/unix/dltest/pkga.c
+++ b/unix/dltest/pkga.c
@@ -129,7 +129,7 @@ Pkga_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkga", "1.0");
+    code = Tcl_PkgProvide(interp, "pkga", "1.0");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgb.c b/unix/dltest/pkgb.c
index 32e2d73..8d8d123 100644
--- a/unix/dltest/pkgb.c
+++ b/unix/dltest/pkgb.c
@@ -152,7 +152,7 @@ Pkgb_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
+    code = Tcl_PkgProvide(interp, "pkgb", "2.3");
     if (code != TCL_OK) {
 	return code;
     }
@@ -189,7 +189,7 @@ Pkgb_SafeInit(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
+    code = Tcl_PkgProvide(interp, "pkgb", "2.3");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgc.c b/unix/dltest/pkgc.c
index a2c4db1..46f6e86 100644
--- a/unix/dltest/pkgc.c
+++ b/unix/dltest/pkgc.c
@@ -121,7 +121,7 @@ Pkgc_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgc", "1.7.2");
+    code = Tcl_PkgProvide(interp, "pkgc", "1.7.2");
     if (code != TCL_OK) {
 	return code;
     }
@@ -158,7 +158,7 @@ Pkgc_SafeInit(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgc", "1.7.2");
+    code = Tcl_PkgProvide(interp, "pkgc", "1.7.2");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgd.c b/unix/dltest/pkgd.c
index e0986f7..d64c807 100644
--- a/unix/dltest/pkgd.c
+++ b/unix/dltest/pkgd.c
@@ -121,7 +121,7 @@ Pkgd_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgd", "7.3");
+    code = Tcl_PkgProvide(interp, "pkgd", "7.3");
     if (code != TCL_OK) {
 	return code;
     }
@@ -158,7 +158,7 @@ Pkgd_SafeInit(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgd", "7.3");
+    code = Tcl_PkgProvide(interp, "pkgd", "7.3");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgooa.c b/unix/dltest/pkgooa.c
index 9aebc3f..7d0c98b 100644
--- a/unix/dltest/pkgooa.c
+++ b/unix/dltest/pkgooa.c
@@ -138,7 +138,7 @@ Pkgooa_Init(
 
     tclOOStubsPtr = &stubsCopy;
 
-    code = Tcl_PkgProvide(interp, "Pkgooa", "1.0");
+    code = Tcl_PkgProvide(interp, "pkgooa", "1.0");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgua.c b/unix/dltest/pkgua.c
index 1c7b46f..c5102a8 100644
--- a/unix/dltest/pkgua.c
+++ b/unix/dltest/pkgua.c
@@ -213,7 +213,7 @@ Pkgua_Init(
 
     PkguaInitTokensHashTable();
 
-    code = Tcl_PkgProvide(interp, "Pkgua", "1.0");
+    code = Tcl_PkgProvide(interp, "pkgua", "1.0");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/tclAppInit.c b/unix/tclAppInit.c
index 3587f35..88b396b 100644
--- a/unix/tclAppInit.c
+++ b/unix/tclAppInit.c
@@ -124,7 +124,7 @@ Tcl_AppInit(
     if (Tcltest_Init(interp) == TCL_ERROR) {
 	return TCL_ERROR;
     }
-    Tcl_StaticPackage(interp, "Tcltest", Tcltest_Init, Tcltest_SafeInit);
+    Tcl_StaticPackage(interp, "tcl::test", Tcltest_Init, Tcltest_SafeInit);
 #endif /* TCL_TEST */
 
     /*
diff --git a/win/Makefile.in b/win/Makefile.in
index fac21a8..3c3303d 100644
--- a/win/Makefile.in
+++ b/win/Makefile.in
@@ -158,7 +158,7 @@ TEST_LIB_FILE		= @LIBPREFIX@tcltest$(VER)${DLLSUFFIX}${LIBSUFFIX}
 TEST_LOAD_PRMS		= lappend ::auto_path {$(ROOT_DIR_WIN_NATIVE)/tests};\
 			  package ifneeded dde 1.4.3 [list load [file normalize ${DDE_DLL_FILE}] dde];\
 			  package ifneeded registry 1.3.5 [list load [file normalize ${REG_DLL_FILE}] registry]
-TEST_LOAD_FACILITIES	= package ifneeded Tcltest ${VERSION}@TCL_PATCH_LEVEL@ [list load [file normalize ${TEST_DLL_FILE}] Tcltest];\
+TEST_LOAD_FACILITIES	= package ifneeded tcl::test ${VERSION}@TCL_PATCH_LEVEL@ [list load [file normalize ${TEST_DLL_FILE}] tcl::test];\
 			  $(TEST_LOAD_PRMS)
 ZLIB_DLL_FILE		= zlib1.dll
 TOMMATH_DLL_FILE		= libtommath.dll
diff --git a/win/tclAppInit.c b/win/tclAppInit.c
index de5f788..0418911 100644
--- a/win/tclAppInit.c
+++ b/win/tclAppInit.c
@@ -180,7 +180,7 @@ Tcl_AppInit(
     if (Tcltest_Init(interp) == TCL_ERROR) {
 	return TCL_ERROR;
     }
-    Tcl_StaticPackage(interp, "Tcltest", Tcltest_Init, Tcltest_SafeInit);
+    Tcl_StaticPackage(interp, "tcl::test", Tcltest_Init, Tcltest_SafeInit);
 #endif /* TCL_TEST */
 
     /*