diff --git a/tests/phpunit/tests/rest-api/rest-comments-controller.php b/tests/phpunit/tests/rest-api/rest-comments-controller.php
index 9d35a747f9..ba67234a23 100644
--- a/tests/phpunit/tests/rest-api/rest-comments-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-comments-controller.php
@@ -3244,7 +3244,7 @@ class WP_Test_REST_Comments_Controller extends WP_Test_REST_Controller_Testcase
 		$this->assertSame( mysql_to_rfc3339( $comment->comment_date ), $data['date'] );
 		$this->assertSame( mysql_to_rfc3339( $comment->comment_date_gmt ), $data['date_gmt'] );
 		$this->assertSame( get_comment_link( $comment ), $data['link'] );
-		$this->assertContains( 'author_avatar_urls', $data );
+		$this->assertArrayHasKey( 'author_avatar_urls', $data );
 		$this->assertSameSets(
 			array(
 				'self',