diff --git a/packages/google-cloud-spanner-dbapi-driver/.coveragerc b/packages/google-cloud-spanner-dbapi-driver/.coveragerc
index b36fd06d4caf..d6c32b6dbad4 100644
--- a/packages/google-cloud-spanner-dbapi-driver/.coveragerc
+++ b/packages/google-cloud-spanner-dbapi-driver/.coveragerc
@@ -3,6 +3,7 @@ branch = True
 
 [report]
 show_missing = True
+fail_under = 85
 omit =
     google/cloud/spanner_driver/__init__.py
 exclude_lines =