diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationFormTest.php
similarity index 92%
rename from core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php
rename to core/modules/config_translation/tests/src/Functional/ConfigTranslationFormTest.php
index 387d686460..4698b05a8e 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationFormTest.php
@@ -1,16 +1,16 @@
 <?php
 
-namespace Drupal\config_translation\Tests;
+namespace Drupal\Tests\config_translation\Functional;
 
 use Drupal\language\Entity\ConfigurableLanguage;
-use Drupal\simpletest\WebTestBase;
+use Drupal\Tests\BrowserTestBase;
 
 /**
  * Tests for altering configuration translation forms.
  *
  * @group config_translation
  */
-class ConfigTranslationFormTest extends WebTestBase {
+class ConfigTranslationFormTest extends BrowserTestBase {
 
   /**
    * Modules to enable.
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationOverviewTest.php
similarity index 97%
rename from core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
rename to core/modules/config_translation/tests/src/Functional/ConfigTranslationOverviewTest.php
index d593a69d38..f083d9e839 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationOverviewTest.php
@@ -1,17 +1,17 @@
 <?php
 
-namespace Drupal\config_translation\Tests;
+namespace Drupal\Tests\config_translation\Functional;
 
 use Drupal\Component\Utility\Html;
 use Drupal\language\Entity\ConfigurableLanguage;
-use Drupal\simpletest\WebTestBase;
+use Drupal\Tests\BrowserTestBase;
 
 /**
  * Translate settings and entities to various languages.
  *
  * @group config_translation
  */
-class ConfigTranslationOverviewTest extends WebTestBase {
+class ConfigTranslationOverviewTest extends BrowserTestBase {
 
   /**
    * Modules to enable.
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationUiThemeTest.php
similarity index 92%
rename from core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php
rename to core/modules/config_translation/tests/src/Functional/ConfigTranslationUiThemeTest.php
index 53713a9238..f9e73a7092 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationUiThemeTest.php
@@ -1,16 +1,16 @@
 <?php
 
-namespace Drupal\config_translation\Tests;
+namespace Drupal\Tests\config_translation\Functional;
 
 use Drupal\language\Entity\ConfigurableLanguage;
-use Drupal\simpletest\WebTestBase;
+use Drupal\Tests\BrowserTestBase;
 
 /**
  * Verifies theme configuration translation settings.
  *
  * @group config_translation
  */
-class ConfigTranslationUiThemeTest extends WebTestBase {
+class ConfigTranslationUiThemeTest extends BrowserTestBase {
 
   /**
    * Modules to enable.