Unit test failure in CommonsInstructionPackageTest testGroupNames

The Essentials build fails with a unit test failure in CommonsInstructionPackageTest

Hudson job that fails: https://builds.onehippo.com/job/essentials-origin-head/781
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Test set: org.onehippo.cms7.essentials.dashboard.packaging.CommonsInstructionPackageTest
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Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 14.982 sec <<< FAILURE! - in org.onehippo.cms7.essentials.dashboard.packaging.CommonsInstructionPackageTest
testGroupNames(org.onehippo.cms7.essentials.dashboard.packaging.CommonsInstructionPackageTest) Time elapsed: 4.602 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:86)
at org.junit.Assert.assertTrue(Assert.java:41)
at org.junit.Assert.assertTrue(Assert.java:52)
at org.onehippo.cms7.essentials.dashboard.packaging.CommonsInstructionPackageTest.testGroupNames(CommonsInstructionPackageTest.java:44)