diff --git a/apps/dav/tests/unit/Comments/CommentsNodeTest.php b/apps/dav/tests/unit/Comments/CommentsNodeTest.php
index 9d0e56041d03ad7030a19923b6f603308932a0c1..4f6d96aa7f274aa24e051251a89b36f2f0742167 100644
--- a/apps/dav/tests/unit/Comments/CommentsNodeTest.php
+++ b/apps/dav/tests/unit/Comments/CommentsNodeTest.php
@@ -107,7 +107,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->node->delete();
 	}
 
-	
+
 	public function testDeleteForbidden() {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
@@ -149,7 +149,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->assertSame($this->node->getName(), $id);
 	}
 
-	
+
 	public function testSetName() {
 		$this->expectException(\Sabre\DAV\Exception\MethodNotAllowed::class);
 
@@ -194,7 +194,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->assertTrue($this->node->updateComment($msg));
 	}
 
-	
+
 	public function testUpdateCommentLogException() {
 		$this->expectException(\Exception::class);
 		$this->expectExceptionMessage('buh!');
@@ -235,7 +235,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->node->updateComment($msg);
 	}
 
-	
+
 	public function testUpdateCommentMessageTooLongException() {
 		$this->expectException(\Sabre\DAV\Exception\BadRequest::class);
 		$this->expectExceptionMessage('Message exceeds allowed character limit of');
@@ -274,7 +274,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->node->updateComment('foo');
 	}
 
-	
+
 	public function testUpdateForbiddenByUser() {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
@@ -309,7 +309,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->node->updateComment($msg);
 	}
 
-	
+
 	public function testUpdateForbiddenByType() {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
@@ -339,7 +339,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$this->node->updateComment($msg);
 	}
 
-	
+
 	public function testUpdateForbiddenByNotLoggedIn() {
 		$this->expectException(\Sabre\DAV\Exception\Forbidden::class);
 
@@ -402,6 +402,7 @@ class CommentsNodeTest extends \Test\TestCase {
 			$ns . 'latestChildDateTime' => new \DateTime('2016-01-12 18:48:00'),
 			$ns . 'objectType' => 'files',
 			$ns . 'objectId' => '1848',
+			$ns . 'referenceId' => 'ref',
 			$ns . 'isUnread' => null,
 		];
 
@@ -468,6 +469,10 @@ class CommentsNodeTest extends \Test\TestCase {
 			->method('getObjectId')
 			->willReturn($expected[$ns . 'objectId']);
 
+		$this->comment->expects($this->once())
+			->method('getReferenceId')
+			->willReturn($expected[$ns . 'referenceId']);
+
 		$user = $this->getMockBuilder(IUser::class)
 			->disableOriginalConstructor()
 			->getMock();
@@ -483,7 +488,7 @@ class CommentsNodeTest extends \Test\TestCase {
 		$properties = $this->node->getProperties(null);
 
 		foreach($properties as $name => $value) {
-			$this->assertTrue(array_key_exists($name, $expected));
+			$this->assertArrayHasKey($name, $expected);
 			$this->assertSame($expected[$name], $value);
 			unset($expected[$name]);
 		}