diff --git a/testing/tools/coverage/coverage_report.py b/testing/tools/coverage/coverage_report.py
index db8d75a..76a6a61 100755
--- a/testing/tools/coverage/coverage_report.py
+++ b/testing/tools/coverage/coverage_report.py
@@ -236,7 +236,7 @@
     coverage_args += ['-f', 'xfa']
 
     # Blacklist test files
-    coverage_args += ['-i', '.*test*.']
+    coverage_args += ['-i', '.*test.*']
 
     return self.call([coverage_bin] + coverage_args) == 0