diff --git a/selfdrive/controls/tests/test_startup.py b/selfdrive/controls/tests/test_startup.py
index ba2d2f5c02..933a0ab6a2 100755
--- a/selfdrive/controls/tests/test_startup.py
+++ b/selfdrive/controls/tests/test_startup.py
@@ -108,6 +108,9 @@ class TestStartup(unittest.TestCase):
       finger = _FINGERPRINTS[car_model][0]
 
     for _ in range(1000):
+      # controlsd waits for boardd to echo back that it has changed the multiplexing mode
+      params.put_bool("ObdMultiplexingChanged", True)
+
       msgs = [[addr, 0, b'\x00'*length, 0] for addr, length in finger.items()]
       pm.send('can', can_list_to_can_capnp(msgs))