As far as I remember, the locale issue has been fixed in master(See "-Duser.language=en") and run well on my local machine: https://github.com/apache/groovy/blob/master/gradle/test.gradle#L24
But the related fix is not merged into 2.4 branch. Here is the JIRA ticket: https://issues.apache.org/jira/browse/GROOVY-9107 And here is the fix: https://github.com/apache/groovy/commit/108c23e253f8f82e21fe75daec5b608b456513b1 Cheers, Daniel.Sun ----- Apache Groovy committer & PMC member Blog: http://blog.sunlan.me Twitter: @daniel_sun -- Sent from: http://groovy.329449.n5.nabble.com/Groovy-Dev-f372993.html