diff --git a/run-tests.sh b/run-tests.sh
index 2808e2af..03fd970b 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -71,7 +71,6 @@ do
   node -e 'process.exit(process.version.startsWith("v'$version'") ? 0 : -1)'
 
   # Install dependencies and link packages together.
-  ./node_modules/.bin/gulp cleanAll
   ./node_modules/.bin/gulp setup
 
   # npm test calls nyc gulp test