I created a simple example at https://github.com/tkruse/weld-implicit-archive. To reproduce, run mvn clean verify.

So this is a specific issue that occurs with the maven failsafe plugin.

I would expect both IntegrationTest (maven surefire) and IntegrationIT (failsafe) to pass, but only one passes. Up to you to decide whether that is a bug and worthy of a separate ticket.