diff --git a/tests/phpunit/tests/dependencies.php b/tests/phpunit/tests/dependencies.php
index 68fc32d83639c..57dd62b2bd000 100644
--- a/tests/phpunit/tests/dependencies.php
+++ b/tests/phpunit/tests/dependencies.php
@@ -154,7 +154,7 @@ public function test_enqueue_before_register() {
 	 *
 	 * @return array[]
 	 */
-	public function data_provider_get_etag() {
+	public static function data_provider_get_etag() {
 		return array(
 			'should accept one dependency'              => array(
 				'load'               => array(