fix bogus test failure

Bug: 376788
Change-Id: Ib1c0a9a20d83e8acf533e2b6b842c78d8fde5cdc
diff --git a/org.eclipse.mylyn.gerrit.tests/src/org/eclipse/mylyn/gerrit/tests/core/client/GerritClientTest.java b/org.eclipse.mylyn.gerrit.tests/src/org/eclipse/mylyn/gerrit/tests/core/client/GerritClientTest.java
index 7b162a1..de2fba9 100644
--- a/org.eclipse.mylyn.gerrit.tests/src/org/eclipse/mylyn/gerrit/tests/core/client/GerritClientTest.java
+++ b/org.eclipse.mylyn.gerrit.tests/src/org/eclipse/mylyn/gerrit/tests/core/client/GerritClientTest.java
@@ -29,7 +29,6 @@
 import org.eclipse.mylyn.internal.gerrit.core.client.GerritException;
 import org.eclipse.mylyn.internal.gerrit.core.client.compat.CommentLink;
 import org.junit.After;
-import org.junit.Assume;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -105,7 +104,9 @@
 
 	@Test
 	public void testInvalidXrsfKey() throws Exception {
-		Assume.assumeTrue(GerritFixture.current().canAuthenticate());
+		if (!GerritFixture.current().canAuthenticate()) {
+			return;
+		}
 
 		WebLocation location = harness.location();
 		GerritAuthenticationState authState = new GerritAuthenticationState();