diff --git a/dlls/gdiplus/tests/brush.c b/dlls/gdiplus/tests/brush.c
index 7c72f48ecbf..70eac03ef8d 100644
--- a/dlls/gdiplus/tests/brush.c
+++ b/dlls/gdiplus/tests/brush.c
@@ -18,9 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include <stdarg.h>
-
-#include "windef.h"
+#include "windows.h"
 #include "gdiplus.h"
 #include "wine/test.h"
 
diff --git a/dlls/gdiplus/tests/matrix.c b/dlls/gdiplus/tests/matrix.c
index ff8a47f7300..cc5348879f1 100644
--- a/dlls/gdiplus/tests/matrix.c
+++ b/dlls/gdiplus/tests/matrix.c
@@ -18,10 +18,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include <stdarg.h>
 #include <math.h>
 
-#include "windef.h"
+#include "windows.h"
 #include "gdiplus.h"
 #include "wine/test.h"
 
diff --git a/dlls/gdiplus/tests/pen.c b/dlls/gdiplus/tests/pen.c
index fc792a60843..00ecbfb04e3 100644
--- a/dlls/gdiplus/tests/pen.c
+++ b/dlls/gdiplus/tests/pen.c
@@ -18,10 +18,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include <stdarg.h>
 #include <math.h>
 
-#include "windef.h"
+#include "windows.h"
 #include "gdiplus.h"
 #include "wine/test.h"