+ - "# Update system gems if requested. This is useful to temporarily workaround troubles in the test runner"
+ - "# See https://github.com/puppetlabs/pdk-templates/commit/705154d5c437796b821691b707156e1b056d244f for an example of how this was used"
+ - '[ -z "$RUBYGEMS_VERSION" ] || gem update --system $RUBYGEMS_VERSION'