I'd suggest you use -ea and -draftCompile for your tests (checkAssertions and draftCompile in the POM). Hopefully that would catch more of such bugs… (-draftCompile will also speed them up) -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.