TestListFile fails on windows

Tests run: 13, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.752 sec <<< FAILURE! - in org.apache.nifi.processors.standard.TestListFile
testRecurse(org.apache.nifi.processors.standard.TestListFile)  Time elapsed: 0.042 sec  <<< FAILURE!
org.junit.ComparisonFailure: expected:<subdir1[/]subdir2/> but was:<subdir1[\]subdir2/>
        at org.junit.Assert.assertEquals(Assert.java:115)
        at org.junit.Assert.assertEquals(Assert.java:144)
        at org.apache.nifi.processors.standard.TestListFile.testRecurse(TestListFile.java:441)