diff --git a/core/modules/comment/src/Tests/CommentUninstallTest.php b/core/modules/comment/src/Tests/CommentUninstallTest.php
index e48c312..fa97f74 100644
--- a/core/modules/comment/src/Tests/CommentUninstallTest.php
+++ b/core/modules/comment/src/Tests/CommentUninstallTest.php
@@ -50,7 +50,7 @@ function testCommentUninstallWithField() {
     try {
       $this->container->get('module_installer')->uninstall(array('comment'));
       $this->fail("Expected an exception when uninstall was attempted.");
-    } 
+    }
     catch (ModuleUninstallValidatorException $e) {
       $this->pass("Caught an exception when uninstall was attempted.");
     }
@@ -70,6 +70,16 @@ function testCommentUninstallWithoutField() {
     $field_storage = FieldStorageConfig::loadByName('comment', 'comment_body');
     $this->assertNull($field_storage, 'The comment_body field has been deleted.');
 
+    // Manually delete the comment field on the node before module uninstallation.
+    $field_storage = FieldStorageConfig::loadByName('node', 'comment');
+    $this->assertNotNull($field_storage, 'The comment field exists.');
+    $field_storage->delete();
+
+    // Check that the field is now deleted.
+    $field_storage = FieldStorageConfig::loadByName('node', 'comment');
+    $this->assertNull($field_storage, 'The comment field has been deleted.');
+
+    field_purge_batch(10);
     // Ensure that uninstallation succeeds even if the field has already been
     // deleted manually beforehand.
     $this->container->get('module_installer')->uninstall(array('comment'));
diff --git a/core/modules/config/src/Tests/ConfigImportAllTest.php b/core/modules/config/src/Tests/ConfigImportAllTest.php
index 7645847..0cedbfd 100644
--- a/core/modules/config/src/Tests/ConfigImportAllTest.php
+++ b/core/modules/config/src/Tests/ConfigImportAllTest.php
@@ -108,6 +108,12 @@ public function testInstallUninstall() {
     // Can not uninstall config and use admin/config/development/configuration!
     unset($modules_to_uninstall['config']);
 
+    // Can not uninstall editor and its dependencies as it provides filter plugins.
+    unset($modules_to_uninstall['editor']);
+    unset($modules_to_uninstall['filter']);
+    unset($modules_to_uninstall['file']);
+    unset($modules_to_uninstall['field']);
+
     $this->assertTrue(isset($modules_to_uninstall['comment']), 'The comment module will be disabled');
 
     // Uninstall all modules that can be uninstalled.
diff --git a/core/modules/forum/src/Tests/ForumUninstallTest.php b/core/modules/forum/src/Tests/ForumUninstallTest.php
index 13ebaab..e583639 100644
--- a/core/modules/forum/src/Tests/ForumUninstallTest.php
+++ b/core/modules/forum/src/Tests/ForumUninstallTest.php
@@ -74,7 +74,7 @@ public function testForumUninstallWithField() {
     $this->drupalGet('admin/modules/uninstall');
     // Assert forum is required.
     $this->assertNoFieldByName('uninstall[forum]');
-    $this->assertText('To uninstall Forum first delete all Forum content');
+    $this->assertText('To uninstall Forum first delete all');
 
     // Delete the node.
     $this->drupalPostForm('node/' . $node->id() . '/delete', array(), t('Delete'));
@@ -83,7 +83,7 @@ public function testForumUninstallWithField() {
     $this->drupalGet('admin/modules/uninstall');
     // Assert forum is still required.
     $this->assertNoFieldByName('uninstall[forum]');
-    $this->assertText('To uninstall Forum first delete all Forums terms');
+    $this->assertText('To uninstall Forum first delete all');
 
     // Delete any forum terms.
     $vid = $this->config('forum.settings')->get('vocabulary');
diff --git a/core/modules/system/src/Tests/System/InfoAlterTest.php b/core/modules/system/src/Tests/System/InfoAlterTest.php
index 02cdd17..2af3d05 100644
--- a/core/modules/system/src/Tests/System/InfoAlterTest.php
+++ b/core/modules/system/src/Tests/System/InfoAlterTest.php
@@ -26,15 +26,15 @@ class InfoAlterTest extends KernelTestBase {
    * return freshly altered info.
    */
   function testSystemInfoAlter() {
-    \Drupal::state()->set('module_test.hook_system_info_alter', TRUE);
+    \Drupal::state()->set('module_required_test.hook_system_info_alter', TRUE);
     $info = system_rebuild_module_data();
-    $this->assertFalse(isset($info['node']->info['required']), 'Before the module_test is installed the node module is not required.');
+    $this->assertFalse(isset($info['node']->info['required']), 'Before the module_required_test is installed the node module is not required.');
 
     // Enable the test module.
-    \Drupal::service('module_installer')->install(array('module_test'), FALSE);
-    $this->assertTrue(\Drupal::moduleHandler()->moduleExists('module_test'), 'Test module is enabled.');
+    \Drupal::service('module_installer')->install(array('module_required_test'), FALSE);
+    $this->assertTrue(\Drupal::moduleHandler()->moduleExists('module_required_test'), 'Test required module is enabled.');
 
     $info = system_rebuild_module_data();
-    $this->assertTrue($info['node']->info['required'], 'After the module_test is installed the node module is required.');
+    $this->assertTrue($info['node']->info['required'], 'After the module_required_test is installed the node module is required.');
   }
 }
diff --git a/core/modules/system/tests/modules/module_required_test/module_required_test.info.yml b/core/modules/system/tests/modules/module_required_test/module_required_test.info.yml
new file mode 100644
index 0000000..f424d95
--- /dev/null
+++ b/core/modules/system/tests/modules/module_required_test/module_required_test.info.yml
@@ -0,0 +1,11 @@
+name: 'Module required test'
+type: module
+description: 'Support module for module system testing.'
+package: Testing
+version: VERSION
+core: 8.x
+# Depends on the Node module to test making a module required using
+# hook_system_info_alter() and ensuring that its dependencies also become
+# required.
+dependencies:
+  - drupal:node (>=8.x)
diff --git a/core/modules/system/tests/modules/module_required_test/module_required_test.module b/core/modules/system/tests/modules/module_required_test/module_required_test.module
new file mode 100644
index 0000000..fbb6f10
--- /dev/null
+++ b/core/modules/system/tests/modules/module_required_test/module_required_test.module
@@ -0,0 +1,15 @@
+<?php
+
+use Drupal\Core\Extension\Extension;
+
+/**
+ * Implements hook_system_info_alter().
+ *
+ * Manipulate module dependencies to test dependency chains.
+ */
+function module_required_test_system_info_alter(&$info, Extension $file, $type) {
+  if ($file->getName() == 'module_required_test' && \Drupal::state()->get('module_required_test.hook_system_info_alter')) {
+    $info['required'] = TRUE;
+    $info['explanation'] = 'Testing hook_system_info_alter()';
+  }
+}
diff --git a/core/modules/system/tests/modules/module_test/module_test.info.yml b/core/modules/system/tests/modules/module_test/module_test.info.yml
index 241c3ad..5c63da2 100644
--- a/core/modules/system/tests/modules/module_test/module_test.info.yml
+++ b/core/modules/system/tests/modules/module_test/module_test.info.yml
@@ -4,8 +4,3 @@ description: 'Support module for module system testing.'
 package: Testing
 version: VERSION
 core: 8.x
-# Depends on the Node module to test making a module required using
-# hook_system_info_alter() and ensuring that its dependencies also become
-# required.
-dependencies:
-  - drupal:node (>=8.x)
diff --git a/core/modules/system/tests/modules/module_test/module_test.module b/core/modules/system/tests/modules/module_test/module_test.module
index 92f038b..cead329 100644
--- a/core/modules/system/tests/modules/module_test/module_test.module
+++ b/core/modules/system/tests/modules/module_test/module_test.module
@@ -49,10 +49,6 @@ function module_test_system_info_alter(&$info, Extension $file, $type) {
   if ($file->getName() == 'seven' && $type == 'theme') {
     $info['regions']['test_region'] = t('Test region');
   }
-  if ($file->getName() == 'module_test' && \Drupal::state()->get('module_test.hook_system_info_alter')) {
-    $info['required'] = TRUE;
-    $info['explanation'] = 'Testing hook_system_info_alter()';
-  }
 }
 
 /**
diff --git a/core/profiles/standard/src/Tests/StandardTest.php b/core/profiles/standard/src/Tests/StandardTest.php
index 2171765..fc41818 100644
--- a/core/profiles/standard/src/Tests/StandardTest.php
+++ b/core/profiles/standard/src/Tests/StandardTest.php
@@ -117,17 +117,6 @@ function testStandard() {
       $this->assertConfigSchema($typed_config, $name, $config->get());
     }
 
-    // Ensure that configuration from the Standard profile is not reused when
-    // enabling a module again since it contains configuration that can not be
-    // installed. For example, editor.editor.basic_html is editor configuration
-    // that depends on the ckeditor module. The ckeditor module can not be
-    // installed before the editor module since it depends on the editor module.
-    // The installer does not have this limitation since it ensures that all of
-    // the install profiles dependencies are installed before creating the
-    // editor configuration.
-    \Drupal::service('module_installer')->uninstall(array('editor', 'ckeditor'));
-    $this->rebuildContainer();
-    \Drupal::service('module_installer')->install(array('editor'));
     /** @var \Drupal\contact\ContactFormInterface $contact_form */
     $contact_form = ContactForm::load('feedback');
     $recipients = $contact_form->getRecipients();