diff --git a/rostests/apitests/comctl32/toolbar.c b/rostests/apitests/comctl32/toolbar.c
index aada2cfd25b..5c2bb093a31 100644
--- a/rostests/apitests/comctl32/toolbar.c
+++ b/rostests/apitests/comctl32/toolbar.c
@@ -109,7 +109,7 @@ START_TEST(toolbar)
     TestVersionMessage();
 
     hV5ActCtx = _CreateV5ActCtx();
-    ok (hV5ActCtx != INVALID_HANDLE_VALUE, "");
+    ok (hV5ActCtx != INVALID_HANDLE_VALUE, "CreateActCtxW failed\n");
     if (hV5ActCtx)
     {
         ULONG_PTR cookie;