diff --git a/testing_support/coverage_utils.py b/testing_support/coverage_utils.py
index 3cd98f5..8b91230 100644
--- a/testing_support/coverage_utils.py
+++ b/testing_support/coverage_utils.py
@@ -64,7 +64,7 @@
 
   COVERAGE.stop()
   if COVERAGE.report() < required_percentage:
-    print 'FATAL: not at required %f% coverage.' % required_percentage
+    print 'FATAL: not at required %f%% coverage.' % required_percentage
     retcode = 2
 
   return retcode