3 files changed, 5 insertions, 5 deletions
diff --git a/c++/test/dsets.cpp b/c++/test/dsets.cpp
index 93c266f..0faf457 100644
--- a/c++/test/dsets.cpp
+++ b/c++/test/dsets.cpp
@@ -1157,7 +1157,7 @@ const int          RANK1 = 1;
 const H5std_string FILE_ACCPLIST("test_accplist.h5");
 
 static herr_t
-test_chunk_cache(FileAccPropList fapl)
+test_chunk_cache(const FileAccPropList &fapl)
 {
     SUBTEST("DSetAccPropList::set/getChunkCache");
 
diff --git a/c++/test/h5cpputil.cpp b/c++/test/h5cpputil.cpp
index d42fc8c..38f9300 100644
--- a/c++/test/h5cpputil.cpp
+++ b/c++/test/h5cpputil.cpp
@@ -212,7 +212,7 @@ InvalidActionException::InvalidActionException() : Exception() {}
 //              func    - IN: Name of the function where failure should occur
 //              message - IN: Message
 //--------------------------------------------------------------------------
-InvalidActionException::InvalidActionException(const H5std_string func, const H5std_string message)
+InvalidActionException::InvalidActionException(const H5std_string &func, const H5std_string &message)
     : Exception(func, message)
 {
 }
@@ -237,7 +237,7 @@ TestFailedException::TestFailedException() : Exception() {}
 //              func    - IN: Name of the function where failure should occur
 //              message - IN: Message
 //--------------------------------------------------------------------------
-TestFailedException::TestFailedException(const H5std_string func, const H5std_string message)
+TestFailedException::TestFailedException(const H5std_string &func, const H5std_string &message)
     : Exception(func, message)
 {
 }
diff --git a/c++/test/h5cpputil.h b/c++/test/h5cpputil.h
index 4439ae3..444bc68 100644
--- a/c++/test/h5cpputil.h
+++ b/c++/test/h5cpputil.h
@@ -48,14 +48,14 @@ void issue_fail_msg(const char *where, int line, const char *file_name, const ch
 
 class InvalidActionException : public Exception {
   public:
-    InvalidActionException(const H5std_string func_name, const H5std_string message = DEFAULT_MSG);
+    InvalidActionException(const H5std_string &func_name, const H5std_string &message = DEFAULT_MSG);
     InvalidActionException();
     virtual ~InvalidActionException() throw();
 };
 
 class TestFailedException : public Exception {
   public:
-    TestFailedException(const H5std_string func_name, const H5std_string message = DEFAULT_MSG);
+    TestFailedException(const H5std_string &func_name, const H5std_string &message = DEFAULT_MSG);
     TestFailedException();
     virtual ~TestFailedException() throw();
 };