revert

Author: taylorotwell

src/Illuminate/Foundation/Testing/TestResponse.php

@@ -746,8 +746,8 @@ public function assertSessionHasErrors($keys = [], $format = null, $errorBag = '
         $errors = app('session.store')->get('errors')->getBag($errorBag);
 
         foreach ($keys as $key => $value) {
-            if (is_array($value)) {
-                PHPUnit::assertArraySubset($value, $errors->get($key, $format));
+            if (is_int($value)) {
+                PHPUnit::assertTrue($errors->has($value), "Session missing error: $value");
             } else {
                 PHPUnit::assertContains($value, $errors->get($key, $format));
             }