diff --git a/Templates/TestDriver.cxx.in b/Templates/TestDriver.cxx.in
index ff3c869e5c..ac531c051b 100644
--- a/Templates/TestDriver.cxx.in
+++ b/Templates/TestDriver.cxx.in
@@ -48,7 +48,7 @@ static char* lowercase(const char* string)
   if (new_string == NULL) { /* NOLINT */
     return NULL;            /* NOLINT */
   }
-  strncpy(new_string, string, stringSize);
+  strcpy(new_string, string);
   for (p = new_string; *p != 0; ++p) {
     *p = CM_CAST(char, tolower(*p));
   }