Point of clarification here.
The wings were NOT being tested at the SAME TIME as the cabin pressure test.
They were simply doing the cabin pressure test while it was on the stand. (which was prudent, given the results)
As far as when it failed in the test, will be the issue. If it failed under static, or final load test, that is a huge problem. If it failed on ultimate (150% of final load) that is not such an issue, just depends at which pressure it failed.
As a side note, given this was a new airframe, with few compression cycles...it should have handled the loads no problem...an airframe with many compression cycles..that is different...this really could be an issue, but who knows.
I suppose a picture of the blown out door has not yet been leaked?
Press noted Boeing locked the facility down. Employees showing up on Friday were not able to access the building.