prefetch openwhisk/example to avoid timeout during test execution
diff --git a/tools/travis/runStandaloneTests.sh b/tools/travis/runStandaloneTests.sh
index a9527fb..ba10c5b 100755
--- a/tools/travis/runStandaloneTests.sh
+++ b/tools/travis/runStandaloneTests.sh
@@ -47,6 +47,7 @@
 # This is required because it is timed out to pull the image during the test.
 docker pull openwhisk/action-nodejs-v14:nightly
 docker pull openwhisk/dockerskeleton:nightly
+docker pull openwhisk/example:nightly
 docker pull openwhisk/apigateway:0.11.0
 
 cd $ROOTDIR