diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake
index 0848e6651a..7d73c09802 100644
--- a/config/cmake/ConfigureChecks.cmake
+++ b/config/cmake/ConfigureChecks.cmake
@@ -179,7 +179,7 @@ endif ()
 # Macro to determine the various conversion capabilities
 #-----------------------------------------------------------------------------
 macro (H5ConversionTests TEST msg)
-  if ("${TEST}" MATCHES "^${TEST}$")
+  if (NOT DEFINED ${TEST})
    # message (STATUS "===> ${TEST}")
     TRY_RUN (${TEST}_RUN   ${TEST}_COMPILE
         ${CMAKE_BINARY_DIR}
@@ -209,21 +209,6 @@ macro (H5ConversionTests TEST msg)
   endif ()
 endmacro ()
 
-#-----------------------------------------------------------------------------
-# Macro to make some of the conversion tests easier to write/read
-#-----------------------------------------------------------------------------
-macro (H5MiscConversionTest VAR TEST msg)
-  if ("${TEST}" MATCHES "^${TEST}$")
-    if (${VAR})
-      set (${TEST} 1 CACHE INTERNAL ${msg})
-      message (STATUS "${msg}... yes")
-    else ()
-      set (${TEST} "" CACHE INTERNAL ${msg})
-      message (STATUS "${msg}... no")
-    endif ()
-  endif ()
-endmacro ()
-
 #-----------------------------------------------------------------------------
 # Check various conversion capabilities
 #-----------------------------------------------------------------------------
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index e1b88534fd..37977685f0 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -145,7 +145,7 @@ endif ()
 
 # For other specific tests, use this MACRO.
 macro (HDF_FUNCTION_TEST OTHER_TEST)
-  if ("${HDF_PREFIX}_${OTHER_TEST}" MATCHES "^${HDF_PREFIX}_${OTHER_TEST}$")
+  if (NOT DEFINED ${HDF_PREFIX}_${OTHER_TEST})
     set (MACRO_CHECK_FUNCTION_DEFINITIONS "-D${OTHER_TEST} ${CMAKE_REQUIRED_FLAGS}")
     set (OTHER_TEST_ADD_LIBRARIES)
     if (CMAKE_REQUIRED_LIBRARIES)
@@ -587,7 +587,7 @@ endif ()
 
 # For other CXX specific tests, use this MACRO.
 macro (HDF_CXX_FUNCTION_TEST OTHER_TEST)
-  if ("${OTHER_TEST}" MATCHES "^${OTHER_TEST}$")
+  if (NOT DEFINED ${OTHER_TEST})
     set (MACRO_CHECK_FUNCTION_DEFINITIONS "-D${OTHER_TEST} ${CMAKE_REQUIRED_FLAGS}")
     set (OTHER_TEST_ADD_LIBRARIES)
     if (CMAKE_REQUIRED_LIBRARIES)
@@ -656,7 +656,7 @@ endif ()
 if (WINDOWS)
   if (NOT HDF_NO_IOEO_TEST)
   message (STATUS "Checking for InitOnceExecuteOnce:")
-  if ("${${HDF_PREFIX}_HAVE_IOEO}" MATCHES "^${${HDF_PREFIX}_HAVE_IOEO}$")
+  if (NOT DEFINED ${${HDF_PREFIX}_HAVE_IOEO})
     if (LARGEFILE)
       set (CMAKE_REQUIRED_DEFINITIONS
           "${CURRENT_TEST_DEFINITIONS} -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE"