diff --git a/packages/google-cloud-certificate-manager/tests/unit/gapic/certificate_manager_v1/test_certificate_manager.py b/packages/google-cloud-certificate-manager/tests/unit/gapic/certificate_manager_v1/test_certificate_manager.py
index ae33c207d943..08817c179608 100644
--- a/packages/google-cloud-certificate-manager/tests/unit/gapic/certificate_manager_v1/test_certificate_manager.py
+++ b/packages/google-cloud-certificate-manager/tests/unit/gapic/certificate_manager_v1/test_certificate_manager.py
@@ -18,8 +18,8 @@
 # try/except added for compatibility with python < 3.8
 try:
     from unittest import mock
-    from unittest.mock import AsyncMock
-except ImportError:
+    from unittest.mock import AsyncMock  # pragma: NO COVER
+except ImportError:  # pragma: NO COVER
     import mock
 
 import math