1 files changed, 28 insertions, 10 deletions
diff --git a/tests/package.test b/tests/package.test
index da778f1..49346d8 100644
--- a/tests/package.test
+++ b/tests/package.test
@@ -17,6 +17,11 @@ if {"::tcltest" ni [namespace children]} {
     namespace import -force ::tcltest::*
 }
 
+::tcltest::loadTestedCommands
+catch [list package require -exact Tcltest [info patchlevel]]
+
+testConstraint testpreferstable [llength [info commands testpreferstable]]
+
 # Do all this in a slave interp to avoid garbaging the package list
 set i [interp create]
 tcltest::loadIntoSlaveInterpreter $i {*}$argv
@@ -569,7 +574,8 @@ test package-3.44 {Tcl_PkgRequire: exact version matching (1578344)} -setup {
 } -returnCodes error -cleanup {
     package forget demo
 } -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} -setup {
+test package-3.50 {Tcl_PkgRequire procedure, picking best stable version} -constraints testpreferstable -setup {
+    testpreferstable
     package forget t
     set x xxx
 } -body {
@@ -1233,9 +1239,11 @@ proc prefer {args} {
     }
 }
 
-test package-13.0 {package prefer defaults} {
+test package-13.0 {package prefer defaults} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {
     prefer
-} stable
+} -result stable
 test package-13.1 {package prefer defaults} -body {
     set ::env(TCL_PKG_PREFER_LATEST) stable	;# value not relevant!
     prefer
@@ -1250,15 +1258,25 @@ test package-14.1 {bogus argument} -returnCodes error -body {
     package prefer foo
 } -result {bad preference "foo": must be latest or stable}
 
-test package-15.0 {set, keep} {package prefer stable} stable
-test package-15.1 {set stable, keep} {prefer stable} {stable stable}
-test package-15.2 {set latest, change} {prefer latest} {stable latest}
-test package-15.3 {set latest, keep} {
+test package-15.0 {set, keep} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {package prefer stable} -result stable
+test package-15.1 {set stable, keep} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {prefer stable} -result {stable stable}
+test package-15.2 {set latest, change} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {prefer latest} -result {stable latest}
+test package-15.3 {set latest, keep} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {
     prefer latest latest
-} {stable latest latest}
-test package-15.4 {set stable, rejected} {
+} -result {stable latest latest}
+test package-15.4 {set stable, rejected} -constraints testpreferstable -setup {
+    testpreferstable
+} -body {
     prefer latest stable
-} {stable latest latest}
+} -result {stable latest latest}
 
 rename prefer {}