fix multi-gpu invalid plan test
@@ -778,6 +778,10 @@ class TestMultiGpuPlanCtxManagerFft:
with pytest.raises(ValueError) as ex, plan_wrong:
fft(a, n=self.n, norm=self.norm)
# targeting a particular error
+ if self.norm == '':
+ # if norm is invalid, we still get ValueError, but it's raised
+ # when checking norm, earlier than the plan check
+ return # skip
assert 'Target array size does not match the plan.' in str(ex.value)
