diff --git a/tests/phpunit/tests/comment/getLastCommentModified.php b/tests/phpunit/tests/comment/getLastCommentModified.php
index b04354f2bd766..4f61f626ffb7a 100644
--- a/tests/phpunit/tests/comment/getLastCommentModified.php
+++ b/tests/phpunit/tests/comment/getLastCommentModified.php
@@ -176,7 +176,7 @@ public function test_internal_comment_types_are_excluded( $timezone, $expected )
 	 *
 	 * @return array<string, array{ timezone: string, expected: string }>
 	 */
-	public function data_internal_comment_types_are_excluded() {
+	public static function data_internal_comment_types_are_excluded() {
 		return array(
 			'server timezone' => array(
 				'timezone' => 'server',