diff --git a/tests/phpunit/tests/locale.php b/tests/phpunit/tests/locale.php
index b672d08121fac..f7c7986c22cde 100644
--- a/tests/phpunit/tests/locale.php
+++ b/tests/phpunit/tests/locale.php
@@ -35,7 +35,7 @@ public function test_property_initializes_to_array( $name ) {
 	 *
 	 * @return array
 	 */
-	public function data_property_initializes_to_array() {
+	public static function data_property_initializes_to_array() {
 		return array(
 			'weekday'         => array( 'weekday' ),
 			'weekday_initial' => array( 'weekday_initial' ),
@@ -201,7 +201,7 @@ public function test_get_word_count_type( $word_count_type, $expected ) {
 	 *
 	 * @return array[]
 	 */
-	public function data_get_word_count_type() {
+	public static function data_get_word_count_type() {
 		return array(
 			'default'                   => array(
 				'word_count_type' => null,