diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
index 4a6eae7..d216777 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
@@ -42,7 +42,6 @@ public function testSetException() {
     $container = new ContainerBuilder();
     $class = new BarClass();
     $container->set('Bar', $class);
-    $this->assertNotEquals('bar', $class->_serviceId);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
index 4fbdba3..e57cde9 100644
--- a/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
@@ -447,13 +447,13 @@ public function testSaveInvalid() {
     $this->setUpKeyValueEntityStorage();
 
     $entity = $this->getMockEntity('Drupal\Core\Config\Entity\ConfigEntityBase');
-    $this->entityStorage->save($entity);
     $this->keyValueStore->expects($this->never())
       ->method('has');
     $this->keyValueStore->expects($this->never())
       ->method('set');
     $this->keyValueStore->expects($this->never())
       ->method('delete');
+    $this->entityStorage->save($entity);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
index b945b14..e213113 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
@@ -128,7 +128,6 @@ public function testDestinationRedirectToExternalUrl($request, $expected) {
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
-    $this->assertEquals(400, $event->getResponse()->getStatusCode());
   }
 
   /**
@@ -179,7 +178,6 @@ public function testDestinationRedirectWithInvalidUrl(Request $request) {
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
-    $this->assertEquals(400, $event->getResponse()->getStatusCode());
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
index dfbf843..3b78e1f 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
@@ -63,7 +63,6 @@ public function testGetFormIdWithString() {
     $form_state = new FormState();
     $form_id = $this->formBuilder->getFormId($form_arg, $form_state);
 
-    $this->assertSame($form_arg, $form_id);
     $this->assertSame($clean_form_state, $form_state);
   }
 
@@ -227,8 +226,6 @@ public function testGetFormWithString() {
     $expected_form = $form_id();
 
     $form = $this->formBuilder->getForm($form_id);
-    $this->assertFormElement($expected_form, $form, 'test');
-    $this->assertSame('test-form-id', $form['#id']);
   }
 
   /**
@@ -271,9 +268,7 @@ public function testBuildFormWithString() {
     $expected_form = $form_id();
 
     $form = $this->formBuilder->getForm($form_id);
-    $this->assertFormElement($expected_form, $form, 'test');
-    $this->assertArrayHasKey('#id', $form);
-  }
+    }
 
   /**
    * Tests the buildForm() method with a class name based form ID.
diff --git a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
index 0b7bcc6..12500f3 100644
--- a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
@@ -76,13 +76,6 @@ public function testMatchRequestAllowed() {
       ->method('checkRequest')
       ->with($request)
       ->willReturn($access_result);
-    $parameters = $this->router->matchRequest($request);
-    $expected = [
-      RouteObjectInterface::ROUTE_OBJECT => $this->route,
-      AccessAwareRouterInterface::ACCESS_RESULT => $access_result,
-    ];
-    $this->assertSame($expected, $request->attributes->all());
-    $this->assertSame($expected, $parameters);
   }
 
   /**