diff --git a/core/modules/system/tests/modules/accept_header_routing_test/tests/Unit/AcceptHeaderMatcherTest.php b/core/modules/system/tests/modules/accept_header_routing_test/tests/Unit/AcceptHeaderMatcherTest.php
index 34179bb..5ae6514 100644
--- a/core/modules/system/tests/modules/accept_header_routing_test/tests/Unit/AcceptHeaderMatcherTest.php
+++ b/core/modules/system/tests/modules/accept_header_routing_test/tests/Unit/AcceptHeaderMatcherTest.php
@@ -48,7 +48,7 @@ protected function setUp() {
    *
    * @see Drupal\Tests\Core\Routing\AcceptHeaderMatcherTest::testAcceptFiltering()
    */
-  public function acceptFilterProvider() {
+  public function providerAcceptFilter() {
     return [
       // Check that JSON routes get filtered and prioritized correctly.
       ['application/json, text/xml;q=0.9', 'json', 'route_c', 'route_e'],