Running mvn test in confluence module results in the following stacktrace:

org.apache.maven.surefire.booter.SurefireExecutionException: Unable to instantiate POJO 'class com.atlassian.confluence.extra.testplugin.TestBean'; nested exception is java.lang.IllegalAccessException: Class org.apache.maven.surefire.testset.PojoTestSet can not access a member of class com.atlassian.confluence.extra.testplugin.TestBean with modifiers ""; nested exception is org.apache.maven.surefire.testset.TestSetFailedException: Unable to instantiate POJO 'class com.atlassian.confluence.extra.testplugin.TestBean'; nested exception is java.lang.IllegalAccessException: Class org.apache.maven.surefire.testset.PojoTestSet can not access a member of class com.atlassian.confluence.extra.testplugin.TestBean with modifiers ""
org.apache.maven.surefire.testset.TestSetFailedException: Unable to instantiate POJO 'class com.atlassian.confluence.extra.testplugin.TestBean'; nested exception is java.lang.IllegalAccessException: Class org.apache.maven.surefire.testset.PojoTestSet can not access a member of class com.atlassian.confluence.extra.testplugin.TestBean with modifiers ""
java.lang.IllegalAccessException: Class org.apache.maven.surefire.testset.PojoTestSet can not access a member of class com.atlassian.confluence.extra.testplugin.TestBean with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:57)
at java.lang.Class.newInstance0(Class.java:302)
at java.lang.Class.newInstance(Class.java:261)
at org.apache.maven.surefire.testset.PojoTestSet.<init>(PojoTestSet.java:55)
at org.apache.maven.surefire.junit.JUnitDirectoryTestSuite.createTestSet(JUnitDirectoryTestSuite.java:64)
at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.locateTestSets(AbstractDirectoryTestSuite.java:96)
at org.apache.maven.surefire.Surefire.createSuiteFromDefinition(Surefire.java:150)
at org.apache.maven.surefire.Surefire.run(Surefire.java:111)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireB