Tag: https://github.com/arquillian/arquillian-core/releases/tag/1.9.4.Final
Diff: https://github.com/arquillian/arquillian-core/compare/1.9.3.Final...1.9.4.Final

Note this will require some test changes due to https://github.com/arquillian/arquillian-core/pull/679 which fixes an issues with tests passing when they should have failed.