The Narayana SPI repo contains some tests which test that the Narayana implementation of the SPI passes. The SPI should not be tied to an implementation, in particular this creates a circular dependency.

Any third party that implements any parts of the SPI should add their own testing and we don't provide a TCK at this time.

Narayana already does some SPI testing in one of its maven modules (org.jboss.narayana.jta:narayana-spi) so that would be a good place for relocating the tests.