diff --git a/tests/typed_prop.phpt b/tests/typed_prop.phpt
index 80f0d3c..04e87c9 100644
--- a/tests/typed_prop.phpt
+++ b/tests/typed_prop.phpt
@@ -28,8 +28,8 @@ try {
 var_dump($test->array);
 
 ?>
---EXPECT--
+--EXPECTF--
 bool(true)
-Cannot assign bool to reference held by property Test::$array of type array
+Cannot assign %s to reference held by property Test::$array of type array
 array(0) {
 }