diff --git a/core/drupalci.yml b/core/drupalci.yml
index cd92d8102d..20310f039f 100644
--- a/core/drupalci.yml
+++ b/core/drupalci.yml
@@ -3,9 +3,9 @@
 # https://www.drupal.org/drupalorg/docs/drupal-ci/customizing-drupalci-testing
 _phpunit_testgroups_to_execute: &testgroups
   # Default: all of Drupal core's test suite runs.
-  testgroups: '--all'
+  #testgroups: '--all'
   # Alternative: run only the tests for one particular module.
-  # testgroups: '--module ckeditor5'
+  testgroups: '--module jsonapi'
 build:
   assessment:
     testing:
diff --git a/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php b/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
index b22b04dbc0..68242c7261 100644
--- a/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
@@ -1435,6 +1435,11 @@ public function testPatchInvalidFieldPropertyFromIssue3127883() {
               'value' => 'Hello World … still.',
               // Intentional typo in the property name!
               'form' => 'plain_text',
+              // Another intentional typo.
+              // cSpell:disable-next-line
+              'sumary' => 'Boring old "Hello World".',
+              // And finally, one that is completely absurd.
+              'foobarbaz' => '<script>alert("HI!");</script>',
             ],
           ],
         ],
@@ -1446,7 +1451,8 @@ public function testPatchInvalidFieldPropertyFromIssue3127883() {
     $data = Json::decode((string) $response->getBody());
     $this->assertSame(422, $response->getStatusCode());
     $this->assertNotNull($data);
-    $this->assertSame("The property 'form' does not exist on the 'body' field of type 'text_with_summary'.", $data['errors'][0]['detail']);
+    // cSpell:disable-next-line
+    $this->assertSame("The properties 'form', 'sumary', 'foobarbaz' do not exist on the 'body' field of type 'text_with_summary'. Did you mean 'format', 'summary'? (Writable properties are: 'value', 'format', 'summary'.)", $data['errors'][0]['detail']);
   }
 
 }