diff --git a/types/wlr_output.c b/types/wlr_output.c
index d07bc405..8f83a005 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -580,6 +580,9 @@ bool wlr_output_test(struct wlr_output *output) {
 	if (!output_basic_test(output)) {
 		return false;
 	}
+	if (!output->impl->test) {
+		return true;
+	}
 	return output->impl->test(output);
 }