diff --git a/src/python/src/grpc/_adapter/_c_test.py b/src/python/src/grpc/_adapter/_c_test.py
index 6e15adbda84..b06215f0e53 100644
--- a/src/python/src/grpc/_adapter/_c_test.py
+++ b/src/python/src/grpc/_adapter/_c_test.py
@@ -216,4 +216,4 @@ class _CTest(unittest.TestCase):
 
 
 if __name__ == '__main__':
-  unittest.main()
+  unittest.main(verbosity=2)