diff --git a/dlls/ddrawex/tests/ddrawex.c b/dlls/ddrawex/tests/ddrawex.c
index 1cff73776fd..59268444ea2 100644
--- a/dlls/ddrawex/tests/ddrawex.c
+++ b/dlls/ddrawex/tests/ddrawex.c
@@ -37,10 +37,11 @@ static IDirectDraw *createDDraw(void)
     return SUCCEEDED(hr) ? dd : NULL;
 }
 
-static ULONG get_ref(IUnknown *o)
+static ULONG get_refcount(void *iface)
 {
-    IUnknown_AddRef(o);
-    return IUnknown_Release(o);
+    IUnknown *unknown = iface;
+    IUnknown_AddRef(unknown);
+    return IUnknown_Release(unknown);
 }
 
 static void RefCountTest(void)
@@ -52,11 +53,11 @@ static void RefCountTest(void)
     HRESULT hr;
     ULONG ref;
 
-    ref = get_ref((IUnknown *) dd1);
+    ref = get_refcount(dd1);
     ok(ref == 1, "Unexpected refcount %lu.\n", ref);
 
     IDirectDraw_AddRef(dd1);
-    ref = get_ref((IUnknown *) dd1);
+    ref = get_refcount(dd1);
     if (ref == 1)
     {
         win_skip("Refcounting is broken\n");
@@ -65,15 +66,15 @@ static void RefCountTest(void)
     }
     ok(ref == 2, "Unexpected refcount %lu.\n", ref);
     IDirectDraw_Release(dd1);
-    ref = get_ref((IUnknown *) dd1);
+    ref = get_refcount(dd1);
     ok(ref == 1, "Unexpected refcount %lu.\n", ref);
 
     IDirectDraw_QueryInterface(dd1, &IID_IDirectDraw2, (void **) &dd2);
-    ref = get_ref((IUnknown *) dd2);
+    ref = get_refcount(dd2);
     ok(ref == 2, "Unexpected refcount %lu.\n", ref);
 
     IDirectDraw_QueryInterface(dd1, &IID_IDirectDraw3, (void **) &dd3);
-    ref = get_ref((IUnknown *) dd3);
+    ref = get_refcount(dd3);
     ok(ref == 3, "Unexpected refcount %lu.\n", ref);
 
     hr = IDirectDraw_QueryInterface(dd1, &IID_IDirectDraw4, (void **) &dd4);
@@ -85,14 +86,14 @@ static void RefCountTest(void)
         IDirectDraw3_Release(dd3);
         return;
     }
-    ref = get_ref((IUnknown *) dd4);
+    ref = get_refcount(dd4);
     ok(ref == 4, "Unexpected refcount %lu.\n", ref);
 
     IDirectDraw_Release(dd1);
     IDirectDraw2_Release(dd2);
     IDirectDraw3_Release(dd3);
 
-    ref = get_ref((IUnknown *) dd4);
+    ref = get_refcount(dd4);
     ok(ref == 1, "Unexpected refcount %lu.\n", ref);
 
     IDirectDraw4_Release(dd4);