diff --git a/test/momo.py b/test/momo.py
index 129b3de3..5bb32751 100644
--- a/test/momo.py
+++ b/test/momo.py
@@ -40,6 +40,7 @@ def run_app(self):
         args = [
             str(self.executable),
             "--no-audio-device",
+            "--video-device /dev/video0",
             self.mode,
             "--port",
             str(self.port),