Direct Runner Tests failing [Java 11]

> Task :runners:direct-java:test

org.apache.beam.runners.direct.WatermarkManagerTest > updateWatermarkWithDifferentWindowedValueInstances SKIPPED

org.apache.beam.runners.direct.ExecutorServiceParallelExecutorTest > testNoThreadsLeakInPipelineExecution SKIPPED

org.apache.beam.runners.direct.ExecutorServiceParallelExecutorTest > ensureMetricsThreadDoesntLeak SKIPPED

org.apache.beam.runners.direct.DirectRunnerApiSurfaceTest > testDirectRunnerApiSurface FAILED
    java.lang.AssertionError: 
    Expected: API surface to include only:
    	Classes in package "org.apache.beam.sdk"
    	Classes in package "org.apache.beam.runners.direct"
    	Classes in package "org.joda.time"
    	Classes in package "javax.annotation"
    	Classes in package "java.math"
	
         but: The following white-listed scopes did not have matching classes on the API surface:
    	No Classes in package "java.math"
    	No Classes in package "javax.annotation"
    	No Classes in package "org.apache.beam.runners.direct"
    	No Classes in package "org.apache.beam.sdk"
    	No Classes in package "org.joda.time"
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
        at org.junit.Assert.assertThat(Assert.java:966)
        at org.junit.Assert.assertThat(Assert.java:931)
        at org.apache.beam.runners.direct.DirectRunnerApiSurfaceTest.testDirectRunnerApiSurface(DirectRunnerApiSurfaceTest.java:76)

Gradle Test Executor 97 finished executing tests.