diff --git a/tests/phpunit/includes/abstract-testcase.php b/tests/phpunit/includes/abstract-testcase.php
index c87e5e7fd077c..5c5f9b3e19165 100644
--- a/tests/phpunit/includes/abstract-testcase.php
+++ b/tests/phpunit/includes/abstract-testcase.php
@@ -207,7 +207,7 @@ public function tear_down() {
 		}
 
 		// Reset comment globals.
-		$comment_globals = array( 'comment_alt', 'comment_depth', 'comment_thread_alt' );
+		$comment_globals = array( 'comment_alt', 'comment_depth', 'comment_thread_alt', 'in_comment_loop' );
 		foreach ( $comment_globals as $global ) {
 			$GLOBALS[ $global ] = null;
 		}
diff --git a/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php b/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php
index ee964d96d9de0..043d38869e5e6 100644
--- a/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php
+++ b/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php
@@ -9,6 +9,12 @@ class Tests_Comment_GetCommentAuthorUrlLink extends WP_UnitTestCase {
 
 	protected static $comments = array();
 
+	public function tear_down() {
+		unset( $GLOBALS['comment'] );
+
+		parent::tear_down();
+	}
+
 	public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
 		unset( $GLOBALS['comment'] );