diff --git a/test/safe_by_default_test.rb b/test/safe_by_default_test.rb
index c5756ff9..61ceeea1 100644
--- a/test/safe_by_default_test.rb
+++ b/test/safe_by_default_test.rb
@@ -21,6 +21,8 @@ def test_add_index_invalid
         migrate AddIndex
       end
     end
+
+    assert_safe AddIndex
   end
 
   def test_add_index_extra_arguments