diff --git a/tests/conform/test-conform-main.c b/tests/conform/test-conform-main.c
index f2a23e0d0..c1952cb75 100644
--- a/tests/conform/test-conform-main.c
+++ b/tests/conform/test-conform-main.c
@@ -59,7 +59,7 @@ main (int argc, char **argv)
   ADD_TEST (test_path, 0, 0);
   ADD_TEST (test_depth_test, 0, 0);
   ADD_TEST (test_color_mask, 0, 0);
-  ADD_TEST (test_backface_culling, 0, 0);
+  ADD_TEST (test_backface_culling, 0, TEST_REQUIREMENT_NPOT);
   ADD_TEST (test_layer_remove, 0, 0);
 
   ADD_TEST (test_sparse_pipeline, 0, 0);