diff --git a/core/modules/action/src/Tests/BulkFormTest.php b/core/modules/action/src/Tests/BulkFormTest.php
index 8fd634b..86c34d0 100644
--- a/core/modules/action/src/Tests/BulkFormTest.php
+++ b/core/modules/action/src/Tests/BulkFormTest.php
@@ -19,6 +19,11 @@
 class BulkFormTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to install.
    *
    * @var array
diff --git a/core/modules/block/src/Tests/BlockUiTest.php b/core/modules/block/src/Tests/BlockUiTest.php
index e03135f..0313443 100644
--- a/core/modules/block/src/Tests/BlockUiTest.php
+++ b/core/modules/block/src/Tests/BlockUiTest.php
@@ -17,6 +17,11 @@
 class BlockUiTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to install.
    *
    * @var array
diff --git a/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php b/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
index d4c1372..fd83966 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
@@ -19,6 +19,11 @@
 class CKEditorAdminTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array
diff --git a/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php b/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
index 37e047c..23cd3c2 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
@@ -17,6 +17,11 @@
 class CKEditorLoadingTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array
diff --git a/core/modules/color/src/Tests/ColorConfigSchemaTest.php b/core/modules/color/src/Tests/ColorConfigSchemaTest.php
index bb1e03c..01f3646 100644
--- a/core/modules/color/src/Tests/ColorConfigSchemaTest.php
+++ b/core/modules/color/src/Tests/ColorConfigSchemaTest.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\color\Tests;
 
-use Drupal\config\Tests\SchemaCheckTestTrait;
 use Drupal\simpletest\WebTestBase;
 
 /**
@@ -17,7 +16,10 @@
  */
 class ColorConfigSchemaTest extends WebTestBase {
 
-  use SchemaCheckTestTrait;
+  /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
 
   /**
    * Modules to install.
@@ -53,7 +55,6 @@ function testValidColorConfigSchema() {
     $edit['scheme'] = '';
     $edit['palette[bg]'] = '#123456';
     $this->drupalPostForm($settings_path, $edit, t('Save configuration'));
-    $this->assertConfigSchema(\Drupal::service('config.typed'), 'color.theme.bartik', \Drupal::config('color.theme.bartik')->get());
   }
 
 }
diff --git a/core/modules/color/src/Tests/ColorTest.php b/core/modules/color/src/Tests/ColorTest.php
index 185faae..8adc7f2 100644
--- a/core/modules/color/src/Tests/ColorTest.php
+++ b/core/modules/color/src/Tests/ColorTest.php
@@ -18,6 +18,11 @@
 class ColorTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to install.
    *
    * @var array
diff --git a/core/modules/comment/src/Tests/CommentActionsTest.php b/core/modules/comment/src/Tests/CommentActionsTest.php
index a0b50d6..e5443c1 100644
--- a/core/modules/comment/src/Tests/CommentActionsTest.php
+++ b/core/modules/comment/src/Tests/CommentActionsTest.php
@@ -17,6 +17,11 @@
 class CommentActionsTest extends CommentTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to install.
    *
    * @var array
diff --git a/core/modules/editor/src/Tests/EditorAdminTest.php b/core/modules/editor/src/Tests/EditorAdminTest.php
index ab79287..d4b880c 100644
--- a/core/modules/editor/src/Tests/EditorAdminTest.php
+++ b/core/modules/editor/src/Tests/EditorAdminTest.php
@@ -17,6 +17,11 @@
 class EditorAdminTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array
diff --git a/core/modules/image/src/Tests/ImageDimensionsTest.php b/core/modules/image/src/Tests/ImageDimensionsTest.php
index 4d6c76b..2b05757 100644
--- a/core/modules/image/src/Tests/ImageDimensionsTest.php
+++ b/core/modules/image/src/Tests/ImageDimensionsTest.php
@@ -17,6 +17,11 @@
 class ImageDimensionsTest extends WebTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array
diff --git a/core/modules/search/src/Tests/SearchTokenizerTest.php b/core/modules/search/src/Tests/SearchTokenizerTest.php
index 66777b3..49796e9 100644
--- a/core/modules/search/src/Tests/SearchTokenizerTest.php
+++ b/core/modules/search/src/Tests/SearchTokenizerTest.php
@@ -14,6 +14,12 @@
  * @group search
  */
 class SearchTokenizerTest extends SearchTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
   /**
    * Verifies that strings of CJK characters are tokenized.
    *
diff --git a/core/modules/statistics/src/Tests/StatisticsReportsTest.php b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
index e3218cf..ed8ba14 100644
--- a/core/modules/statistics/src/Tests/StatisticsReportsTest.php
+++ b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
@@ -15,6 +15,11 @@
 class StatisticsReportsTest extends StatisticsTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Tests the "popular content" block.
    */
   function testPopularContentBlock() {
diff --git a/core/modules/taxonomy/src/Tests/VocabularyCrudTest.php b/core/modules/taxonomy/src/Tests/VocabularyCrudTest.php
index 6cc1678..8ab9ebb 100644
--- a/core/modules/taxonomy/src/Tests/VocabularyCrudTest.php
+++ b/core/modules/taxonomy/src/Tests/VocabularyCrudTest.php
@@ -18,6 +18,11 @@
 class VocabularyCrudTest extends TaxonomyTestBase {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array
diff --git a/core/modules/tour/src/Tests/TourTest.php b/core/modules/tour/src/Tests/TourTest.php
index 8ed261c..ee8ea7b 100644
--- a/core/modules/tour/src/Tests/TourTest.php
+++ b/core/modules/tour/src/Tests/TourTest.php
@@ -17,6 +17,11 @@
 class TourTest extends TourTestBasic {
 
   /**
+   * {@inheritdoc}
+   */
+  protected $strictConfigSchema = TRUE;
+
+  /**
    * Modules to enable.
    *
    * @var array