diff --git a/script/cached-bundle b/script/cached-bundle
index 457d0db9..446f4878 100755
--- a/script/cached-bundle
+++ b/script/cached-bundle
@@ -39,7 +39,7 @@ fi
 
 bundle "$@"
 
-if [ ! -f "$cache_name" ]; then
+if [ ! -f "$cache_name" ] && [ -n "$AMAZON_SECRET_ACCESS_KEY" ]; then
   echo "Caching \`${bundle_path}' to S3"
   tar czf "$cache_name" "$bundle_path"
   script/s3-put "$cache_name" "${AMAZON_S3_BUCKET}:${TRAVIS_REPO_SLUG}/${cache_name}"