diff --git a/Source/cmGetTestPropertyCommand.h b/Source/cmGetTestPropertyCommand.h
index 7d69c24da2..30095704bc 100644
--- a/Source/cmGetTestPropertyCommand.h
+++ b/Source/cmGetTestPropertyCommand.h
@@ -55,7 +55,8 @@ public:
       "  GET_TEST_PROPERTY(test VAR property)\n"
       "Get a property from the Test.  The value of the property is " 
       "stored in the variable VAR. If the property is not found, "
-      "CMake will report an error.";
+      "CMake will report an error. For a list of standard properties "
+      "you can type cmake --help-property-list";
     }
 
   cmTypeMacro(cmGetTestPropertyCommand, cmCommand);