Add missing dut argument to test
Without it this test was being dropped with a warning, and never actually run.
@@ -875,7 +875,7 @@ if sys.version_info[:2] >= (3, 3):
@cocotb.test()
-def test_exceptions():
+def test_exceptions(dut):
@cocotb.coroutine
def raise_soon():
yield Timer(10)
