diff --git a/dlls/d3dcompiler_43/tests/hlsl_d3d9.c b/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
index 87f63023c58..03ded640e8f 100644
--- a/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
+++ b/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
@@ -1001,9 +1001,11 @@ static void test_struct_semantics(void)
         draw_quad(test_context.device, ps_code);
 
         v = get_color_vec4(test_context.device, 64, 48);
+        v.z = v.w = 0.0f;
         todo_wine ok(compare_vec4(&v, 0.1f, 0.1f, 0.0f, 0.0f, 4096),
                 "Got unexpected value {%.8e, %.8e, %.8e, %.8e}.\n", v.x, v.y, v.z, v.w);
         v = get_color_vec4(test_context.device, 320, 240);
+        v.z = v.w = 0.0f;
         todo_wine ok(compare_vec4(&v, 0.5f, 0.5f, 0.0f, 0.0f, 4096),
                 "Got unexpected value {%.8e, %.8e, %.8e, %.8e}.\n", v.x, v.y, v.z, v.w);