diff --git a/.coveragerc b/.coveragerc
index 33ea00ba9..23861a8eb 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -2,6 +2,7 @@
 branch = True
 
 [report]
+fail_under = 100
 show_missing = True
 omit =
     google/cloud/bigquery/__init__.py