diff --git a/release.sh b/release.sh
index 2839647f1..21c0c34dc 100755
--- a/release.sh
+++ b/release.sh
@@ -44,6 +44,7 @@ if [ $? -ne 0 ]; then
   exit 1
 fi
 
+rm dygraph-combined.js  # changes to this will make the tests fail.
 make lint test test-combined
 if [ $? -ne 0 ]; then
   echo "Tests failed. Won't release!" >&2