It looks like this issue is related to the version of bundler on the ruby image. Following the steps posted to uninstall bundler 1.16 and re-installing bundler 1.15.4 has allowed the tests to run again
It looks like this issue is related to the version of bundler on the ruby image. Following the steps posted to uninstall bundler 1.16 and re-installing bundler 1.15.4 has allowed the tests to run again