MentionsIT#documentBody is failing

org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
	at org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145)
	at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:527)
	at org.xwiki.mentions.test.ui.MentionsIT.lambda$documentBody$2(MentionsIT.java:115)
	at org.xwiki.mentions.test.ui.MentionsIT.runAsUser(MentionsIT.java:251)
	at org.xwiki.mentions.test.ui.MentionsIT.documentBody(MentionsIT.java:108)