diff --git a/tests/gadget-zero/test_gadget0.py b/tests/gadget-zero/test_gadget0.py
index ddd449e2..4a14ec9a 100644
--- a/tests/gadget-zero/test_gadget0.py
+++ b/tests/gadget-zero/test_gadget0.py
@@ -27,6 +27,7 @@ class TestGadget0(unittest.TestCase):
     def setUp(self):
         self.dev = usb.core.find(idVendor=0xcafe, idProduct=0xcafe, custom_match=find_by_serial(DUT_SERIAL))
         self.assertIsNotNone(self.dev, "Couldn't find locm3 gadget0 device")
+        self.longMessage = True
 
     def tearDown(self):
         uu.dispose_resources(self.dev)