1 files changed, 3 insertions, 2 deletions
diff --git a/activerecord/test/cases/migration/compatibility_test.rb b/activerecord/test/cases/migration/compatibility_test.rb
index e5a7412bc3..9296f3da90 100644
--- a/activerecord/test/cases/migration/compatibility_test.rb
+++ b/activerecord/test/cases/migration/compatibility_test.rb
@@ -103,9 +103,10 @@ module ActiveRecord
       end
 
       def test_legacy_migrations_raises_exception_when_inherited
-        assert_raises(StandardError) do
-          Class.new(ActiveRecord::Migration)
+        e = assert_raises(StandardError) do
+          class_eval("class LegacyMigration < ActiveRecord::Migration; end")
         end
+        assert_match(/LegacyMigration < ActiveRecord::Migration\[4\.2\]/, e.message)
       end
     end
   end