Lyor Goldstein some hints about what you could add back to the test case (on top of what I already mentioned):

• implemented interfaces
• entity content (properties, associations, ...)
• entity configuration (@EntityListener, ...)
• table configuration (custom names, index definitions, ...)
• global configuration such as event listeners, interceptors, ...
• and as I mentioned, the content of ImprovedPhysicalNamingStrategyImpl as well as the exact driver version you are using