diff --git a/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php b/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
index 14e73c44fd..9c418b902b 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
@@ -312,8 +312,6 @@ public function testNormalize() {
    * @covers ::normalize
    */
   public function testNormalizeRelated() {
-    $this->markTestIncomplete('This fails and should be fixed by https://www.drupal.org/project/drupal/issues/2922121');
-
     list($request, $resource_type) = $this->generateProphecies('node', 'article', 'uid');
     $request->query = new ParameterBag([
       'fields' => [