diff --git a/rostests/apitests/gdi32/CombineTransform.c b/rostests/apitests/gdi32/CombineTransform.c
index 3395e9f261f..c7b0eaf1164 100644
--- a/rostests/apitests/gdi32/CombineTransform.c
+++ b/rostests/apitests/gdi32/CombineTransform.c
@@ -54,6 +54,8 @@ void Test_CombineTransform()
     BOOL ret;
 
     /* Test NULL paramters */
+    set_xform(&xform1, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0);
+    set_xform(&xform2, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0);
     SetLastError(ERROR_SUCCESS);
     ret = CombineTransform(&xform3, &xform1, NULL);
     ok_int(ret, 0);
@@ -61,8 +63,6 @@ void Test_CombineTransform()
     ok_int(ret, 0);
     ret = CombineTransform(NULL, &xform1, &xform2);
     ok_int(ret, 0);
-    ret = CombineTransform(&xform3, &xform1, &xform2);
-    ok_int(ret, 0);
     ok_int(GetLastError(), ERROR_SUCCESS);
 
     /* 2 zero matrices */