Spotted in our nightly test run:

PointerEventTest > testMiddleButtonDrag FAILED
    java.lang.AssertionError: expected:<4> but was:<0>
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.failNotEquals(Assert.java:835)
        at org.junit.Assert.assertEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:633)
        at test.robot.javafx.web.PointerEventTest.testMiddleButtonDrag(PointerEventTest.java:159)