diff --git a/core/lib/Drupal/Core/Test/SimpletestTestRunResultsStorage.php b/core/lib/Drupal/Core/Test/SimpletestTestRunResultsStorage.php
index 80514a8ac4dc23cfabe013344e6d45256b9ab312..6addc207a776ee3577f6e8be0c4bc2a262b6138b 100644
--- a/core/lib/Drupal/Core/Test/SimpletestTestRunResultsStorage.php
+++ b/core/lib/Drupal/Core/Test/SimpletestTestRunResultsStorage.php
@@ -133,8 +133,8 @@ public function getCurrentTestRunState(TestRun $test_run): array {
     // 'test_class' from {simpletest}.
     $select = $this->connection->select($max_message_id_subquery, 'st_sub');
     $select->join('simpletest', 'st', '[st].[message_id] = [st_sub].[max_message_id]');
-    $select->join('simpletest_test_id', 'sttid', '[st].[test_id] = [sttid].[test_id]');
-    $select->addField('sttid', 'last_prefix', 'db_prefix');
+    $select->join('simpletest_test_id', 'st_tid', '[st].[test_id] = [st_tid].[test_id]');
+    $select->addField('st_tid', 'last_prefix', 'db_prefix');
     $select->addField('st', 'test_class');
 
     return $select->execute()->fetchAssoc();
diff --git a/core/misc/cspell/dictionary.txt b/core/misc/cspell/dictionary.txt
index 6480a51bbec5b16a36b18a84d3981aa147e729bf..c75d254d962761ca38a245d0855afdf6e179892e 100644
--- a/core/misc/cspell/dictionary.txt
+++ b/core/misc/cspell/dictionary.txt
@@ -175,7 +175,6 @@ dotenv
 downcasting
 dragtable
 drillable
-drivertest
 dropbutton
 dropbuttons
 drupaldevdays
@@ -184,7 +183,6 @@ drupalelementstylecommand
 drupalelementstyleediting
 drupalelementstyleui
 drupalhtmlbuilder
-drupalimage
 drupalism
 drupalisms
 drupallink
@@ -386,8 +384,6 @@ nightwatch
 nightwatchjs
 nikic
 nntp
-noadd
-nocache
 nocase
 nodir
 nofields
@@ -566,7 +562,6 @@ streamwrappers
 strikethrough
 striptags
 strs
-sttid
 styleguide
 stylelint
 stylelintcache
@@ -621,7 +616,6 @@ tablesorts
 tabset
 tabwidth
 taskless
-tcomment
 testbot
 testbots
 testgroups
diff --git a/core/misc/cspell/drupal-dictionary.txt b/core/misc/cspell/drupal-dictionary.txt
index 0f2405c2ea2fa225468345b80682a9b35bc04ea5..0f018530759060451577152b5860b1372c9f5f86 100644
--- a/core/misc/cspell/drupal-dictionary.txt
+++ b/core/misc/cspell/drupal-dictionary.txt
@@ -6,6 +6,7 @@ dependee's
 dependees
 drupalci
 druplicon
+drupalimage
 drush
 langcode
 langcodes
diff --git a/core/modules/jsonapi/tests/src/Functional/JsonApiFilterRegressionTest.php b/core/modules/jsonapi/tests/src/Functional/JsonApiFilterRegressionTest.php
index 4b6af8d4d6a6dbbbbadc4dc51867c325192f27d1..4879aac467080e11266d8afa6b743330bf6e013c 100644
--- a/core/modules/jsonapi/tests/src/Functional/JsonApiFilterRegressionTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/JsonApiFilterRegressionTest.php
@@ -48,7 +48,7 @@ class JsonApiFilterRegressionTest extends JsonApiFunctionalTestBase {
   public function testBundleSpecificTargetEntityTypeFromIssue2953207(): void {
     // Set up data model.
     $this->assertTrue($this->container->get('module_installer')->install(['comment'], TRUE), 'Installed modules.');
-    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'tcomment');
+    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'test_comment_type');
     $this->rebuildAll();
 
     // Create data.
@@ -67,7 +67,7 @@ public function testBundleSpecificTargetEntityTypeFromIssue2953207(): void {
     $user = $this->drupalCreateUser([
       'access comments',
     ]);
-    $response = $this->request('GET', Url::fromUri('internal:/jsonapi/comment/tcomment?include=entity_id&filter[entity_id.name]=foobar'), [
+    $response = $this->request('GET', Url::fromUri('internal:/jsonapi/comment/test_comment_type?include=entity_id&filter[entity_id.name]=foobar'), [
       RequestOptions::AUTH => [
         $user->getAccountName(),
         $user->pass_raw,
diff --git a/core/modules/jsonapi/tests/src/Functional/JsonApiPatchRegressionTest.php b/core/modules/jsonapi/tests/src/Functional/JsonApiPatchRegressionTest.php
index b36cb8ce8aef0ac265ecbcf1fce7b6ebfbd1ff32..800d514e1c319cdb7cf0bbd73e2f879b353dd5ea 100644
--- a/core/modules/jsonapi/tests/src/Functional/JsonApiPatchRegressionTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/JsonApiPatchRegressionTest.php
@@ -51,7 +51,7 @@ class JsonApiPatchRegressionTest extends JsonApiFunctionalTestBase {
   public function testBundleSpecificTargetEntityTypeFromIssue2953207(): void {
     // Set up data model.
     $this->assertTrue($this->container->get('module_installer')->install(['comment'], TRUE), 'Installed modules.');
-    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'tcomment');
+    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'test_comment_type');
     $this->rebuildAll();
 
     // Create data.
@@ -70,7 +70,7 @@ public function testBundleSpecificTargetEntityTypeFromIssue2953207(): void {
     $user = $this->drupalCreateUser([
       'access comments',
     ]);
-    $response = $this->request('GET', Url::fromUri('internal:/jsonapi/comment/tcomment?include=entity_id&filter[entity_id.name]=foobar'), [
+    $response = $this->request('GET', Url::fromUri('internal:/jsonapi/comment/test_comment_type?include=entity_id&filter[entity_id.name]=foobar'), [
       RequestOptions::AUTH => [
         $user->getAccountName(),
         $user->pass_raw,
diff --git a/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php b/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
index 81bbf299067cf41c27a0f049be0ad492f1f7bbd8..1aa7e87987ab94f57c6ae99b7a377c66589eb2cf 100644
--- a/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/JsonApiRegressionTest.php
@@ -56,7 +56,7 @@ public function testDeepNestedIncludeMultiTargetEntityTypeFieldFromIssue2973681(
     // Set up data model.
     $this->assertTrue($this->container->get('module_installer')->install(['comment'], TRUE), 'Installed modules.');
     $this->addDefaultCommentField('node', 'article');
-    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'tcomment');
+    $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'test_comment_type');
     $this->drupalCreateContentType(['type' => 'page']);
     $this->createEntityReferenceField(
       'node',
@@ -68,7 +68,7 @@ public function testDeepNestedIncludeMultiTargetEntityTypeFieldFromIssue2973681(
       [
         'target_bundles' => [
           'comment' => 'comment',
-          'tcomment' => 'tcomment',
+          'test_comment_type' => 'test_comment_type',
         ],
       ],
       FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED
diff --git a/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_form_display.node.basic_page.default.yml b/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_form_display.node.basic_page.default.yml
index 7536145f9021e50e41a4f4448ad7c9d88607994d..90fbbae8cf3cdb33b14a4b73106a35b8dbb29d17 100644
--- a/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_form_display.node.basic_page.default.yml
+++ b/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_form_display.node.basic_page.default.yml
@@ -5,7 +5,7 @@ dependencies:
     - field.field.node.basic_page.field_twin_media
     - field.field.node.basic_page.field_single_media_type
     - field.field.node.basic_page.field_unlimited_media
-    - field.field.node.basic_page.field_noadd_media
+    - field.field.node.basic_page.field_no_add_media
     - node.type.basic_page
   module:
     - media_library
@@ -43,7 +43,7 @@ content:
     region: content
     settings: {  }
     third_party_settings: {  }
-  field_noadd_media:
+  field_no_add_media:
     type: media_library_widget
     weight: 123
     region: content
diff --git a/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_view_display.node.basic_page.default.yml b/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_view_display.node.basic_page.default.yml
index 8533d1669a02ef423612a8fc89fedfa4ff3f363f..f17ce0c831dc8446f836341c74a265dd12f28263 100644
--- a/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_view_display.node.basic_page.default.yml
+++ b/core/modules/media_library/tests/modules/media_library_test/config/install/core.entity_view_display.node.basic_page.default.yml
@@ -4,7 +4,7 @@ dependencies:
   config:
     - field.field.node.basic_page.field_twin_media
     - field.field.node.basic_page.field_unlimited_media
-    - field.field.node.basic_page.field_noadd_media
+    - field.field.node.basic_page.field_no_add_media
     - node.type.basic_page
   module:
     - user
@@ -40,7 +40,7 @@ content:
     third_party_settings: {  }
     weight: 101
     region: content
-  field_noadd_media:
+  field_no_add_media:
     type: entity_reference_entity_view
     label: above
     settings:
diff --git a/core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_noadd_media.yml b/core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_no_add_media.yml
similarity index 82%
rename from core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_noadd_media.yml
rename to core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_no_add_media.yml
index 327e0fb5847b9ca1a88a549c9a396fd2e11efdd4..4415b9d025913894422dff7c702ee97b6d5a015e 100644
--- a/core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_noadd_media.yml
+++ b/core/modules/media_library/tests/modules/media_library_test/config/install/field.field.node.basic_page.field_no_add_media.yml
@@ -2,12 +2,12 @@ langcode: en
 status: true
 dependencies:
   config:
-    - field.storage.node.field_noadd_media
+    - field.storage.node.field_no_add_media
     - media.type.type_one
     - media.type.type_two
     - node.type.basic_page
-id: node.basic_page.field_noadd_media
-field_name: field_noadd_media
+id: node.basic_page.field_no_add_media
+field_name: field_no_add_media
 entity_type: node
 bundle: basic_page
 label: 'No add media'
diff --git a/core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_noadd_media.yml b/core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_no_add_media.yml
similarity index 82%
rename from core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_noadd_media.yml
rename to core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_no_add_media.yml
index 80bb78a4dc9785b657411c0868ecd6b8eacff15c..42163f5f8f3709dbeb593f0898088d25d06863fa 100644
--- a/core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_noadd_media.yml
+++ b/core/modules/media_library/tests/modules/media_library_test/config/install/field.storage.node.field_no_add_media.yml
@@ -4,8 +4,8 @@ dependencies:
   module:
     - media
     - node
-id: node.field_noadd_media
-field_name: field_noadd_media
+id: node.field_no_add_media
+field_name: field_no_add_media
 entity_type: node
 type: entity_reference
 settings:
diff --git a/core/modules/system/tests/modules/common_test/common_test.libraries.yml b/core/modules/system/tests/modules/common_test/common_test.libraries.yml
index 093049e781dc2ba3647a54548db71071e3744108..bd7fe58aa8db05d0d1a0f31ce4e3fd3fb8cdb90f 100644
--- a/core/modules/system/tests/modules/common_test/common_test.libraries.yml
+++ b/core/modules/system/tests/modules/common_test/common_test.libraries.yml
@@ -41,7 +41,7 @@ js-header:
 # Library to test setting cache = FALSE, to prevent aggregation.
 no-cache:
   js:
-    nocache.js: { cache: false }
+    no_cache.js: { cache: false }
 
 order:
   js:
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Connection.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Connection.php
similarity index 74%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Connection.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Connection.php
index 9de6eda72cb3278ce4694a7a679e951501754f8c..3fdb7999c4cd5fd357dd35e5dad507bf08b30990 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Connection.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Connection.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestMysql;
+namespace Drupal\driver_test\Driver\Database\DriverTestMysql;
 
 use Drupal\mysql\Driver\Database\mysql\Connection as CoreConnection;
 
@@ -13,7 +13,7 @@ class Connection extends CoreConnection {
    * {@inheritdoc}
    */
   public function driver() {
-    return 'DrivertestMysql';
+    return 'DriverTestMysql';
   }
 
 }
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Install/Tasks.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Install/Tasks.php
similarity index 82%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Install/Tasks.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Install/Tasks.php
index 4a6f247bb9a1a782a88fa8986451e29f9fb91ed8..85a8268392f9ba614c4b32a5c4ff841190f98ff8 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Install/Tasks.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/Install/Tasks.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestMysql\Install;
+namespace Drupal\driver_test\Driver\Database\DriverTestMysql\Install;
 
 use Drupal\mysql\Driver\Database\mysql\Install\Tasks as CoreTasks;
 
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Connection.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Connection.php
similarity index 87%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Connection.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Connection.php
index 447c3acd481deb6947d12d4a5227cce7ebe4ad7a..7990f6b3690751ea878eba58c0021d59412609e8 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Connection.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Connection.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestMysqlDeprecatedVersion;
+namespace Drupal\driver_test\Driver\Database\DriverTestMysqlDeprecatedVersion;
 
 use Drupal\mysql\Driver\Database\mysql\Connection as CoreConnection;
 
@@ -22,7 +22,7 @@ class Connection extends CoreConnection {
    * {@inheritdoc}
    */
   public function driver() {
-    return 'DrivertestMysqlDeprecatedVersion';
+    return 'DriverTestMysqlDeprecatedVersion';
   }
 
   /**
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Install/Tasks.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Install/Tasks.php
similarity index 83%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Install/Tasks.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Install/Tasks.php
index 42a7c52d7e29151c37718c377b55c16bfdd5abd9..8a01b74993575e91ddf174c3732daff2f6d87637 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Install/Tasks.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysqlDeprecatedVersion/Install/Tasks.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestMysqlDeprecatedVersion\Install;
+namespace Drupal\driver_test\Driver\Database\DriverTestMysqlDeprecatedVersion\Install;
 
 use Drupal\mysql\Driver\Database\mysql\Install\Tasks as CoreTasks;
 
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Connection.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Connection.php
similarity index 74%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Connection.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Connection.php
index f9f15f091d312aefe8795a18047fb5cf30c84866..6df286dabd67244725490d4118a8b998135b587e 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Connection.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Connection.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestPgsql;
+namespace Drupal\driver_test\Driver\Database\DriverTestPgsql;
 
 use Drupal\pgsql\Driver\Database\pgsql\Connection as CoreConnection;
 
@@ -13,7 +13,7 @@ class Connection extends CoreConnection {
    * {@inheritdoc}
    */
   public function driver() {
-    return 'DrivertestPgsql';
+    return 'DriverTestPgsql';
   }
 
 }
diff --git a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Install/Tasks.php b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Install/Tasks.php
similarity index 82%
rename from core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Install/Tasks.php
rename to core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Install/Tasks.php
index 51fcd2796721b09336b874903c6fde4934a830ec..a66e0df6298334b2682595e9e2a20a9919485def 100644
--- a/core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Install/Tasks.php
+++ b/core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/Install/Tasks.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\driver_test\Driver\Database\DrivertestPgsql\Install;
+namespace Drupal\driver_test\Driver\Database\DriverTestPgsql\Install;
 
 use Drupal\pgsql\Driver\Database\pgsql\Install\Tasks as CoreTasks;
 
diff --git a/core/modules/system/tests/src/Functional/System/DatabaseDriverProvidedByModuleTest.php b/core/modules/system/tests/src/Functional/System/DatabaseDriverProvidedByModuleTest.php
index 3c39819d6646e6bd07196d2b14ee9ab972fc07da..4e17c7288ff63413c67343e30983688a86e611bd 100644
--- a/core/modules/system/tests/src/Functional/System/DatabaseDriverProvidedByModuleTest.php
+++ b/core/modules/system/tests/src/Functional/System/DatabaseDriverProvidedByModuleTest.php
@@ -49,9 +49,9 @@ public function testDatabaseDriverIsProvidedByModuleButTheModuleIsNotEnabled():
       'password' => $connection_info['default']['password'],
       'prefix' => $connection_info['default']['prefix'],
       'host' => $connection_info['default']['host'],
-      'driver' => 'Drivertest' . ucfirst($driver),
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\Drivertest' . ucfirst($driver),
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/Drivertest' . ucfirst($driver),
+      'driver' => 'DriverTest' . ucfirst($driver),
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTest' . ucfirst($driver),
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTest' . ucfirst($driver),
       'dependencies' => [
         $driver => [
           'namespace' => "Drupal\\{$driver}",
diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallerExistingBrokenDatabaseSettingsTest.php b/core/tests/Drupal/FunctionalTests/Installer/InstallerExistingBrokenDatabaseSettingsTest.php
index 636300b14482f2f3fcf8765223b31091f80bc082..2c59319229335cb5cdaec89f48bb7631d87ab9a4 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallerExistingBrokenDatabaseSettingsTest.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallerExistingBrokenDatabaseSettingsTest.php
@@ -34,8 +34,8 @@ protected function prepareEnvironment() {
     // not meet requirements.
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
-    $connection_info['default']['driver'] = 'DrivertestMysqlDeprecatedVersion';
-    $namespace = 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysqlDeprecatedVersion';
+    $connection_info['default']['driver'] = 'DriverTestMysqlDeprecatedVersion';
+    $namespace = 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysqlDeprecatedVersion';
     $connection_info['default']['namespace'] = $namespace;
     $connection_info['default']['autoload'] = \Drupal::service('extension.list.database_driver')
       ->get($namespace)
diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallerNonDefaultDatabaseDriverTest.php b/core/tests/Drupal/FunctionalTests/Installer/InstallerNonDefaultDatabaseDriverTest.php
index d15135cdbd0640fcfc35580b27d0bee99cf2d5a7..0eada97303bdcaa5af4126a621e3a5eca8744712 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallerNonDefaultDatabaseDriverTest.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallerNonDefaultDatabaseDriverTest.php
@@ -38,7 +38,7 @@ protected function setUpSettings() {
       $this->markTestSkipped("This test does not support the {$driver} database driver.");
     }
     $driverNamespace = Database::getConnection()->getConnectionOptions()['namespace'];
-    $this->testDriverName = 'Drivertest' . ucfirst($driver);
+    $this->testDriverName = 'DriverTest' . ucfirst($driver);
     $testDriverNamespace = "Drupal\\driver_test\\Driver\\Database\\{$this->testDriverName}";
 
     // Assert that we are using the database drivers from the driver_test module.
diff --git a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
index 60f18afa57c7d3a11503df6329438b5053d71cdd..0f2235a85a71508cedec1267064fbac7e5fbfb87 100644
--- a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
@@ -255,7 +255,7 @@ public function testNoCache(): void {
     $assets = AttachedAssets::createFromRenderArray($build);
 
     $js = $this->assetResolver->getJsAssets($assets, FALSE, \Drupal::languageManager()->getCurrentLanguage())[1];
-    $this->assertFalse($js['core/modules/system/tests/modules/common_test/nocache.js']['preprocess'], 'Setting cache to FALSE sets preprocess to FALSE when adding JavaScript.');
+    $this->assertFalse($js['core/modules/system/tests/modules/common_test/no_cache.js']['preprocess'], 'Setting cache to FALSE sets preprocess to FALSE when adding JavaScript.');
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/KernelTestBaseDatabaseDriverModuleTest.php b/core/tests/Drupal/KernelTests/KernelTestBaseDatabaseDriverModuleTest.php
index b26046d290eabae581354055f2a7edae6d1d11a6..e8dfc3be6f45c885105b74de096b5f9ad143e800 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBaseDatabaseDriverModuleTest.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBaseDatabaseDriverModuleTest.php
@@ -30,7 +30,7 @@ protected function getDatabaseConnectionInfo() {
       if (in_array($database['driver'], ['mysql', 'pgsql'])) {
         // Change the used database driver to the one provided by the module
         // "driver_test".
-        $driver = 'Drivertest' . ucfirst($database['driver']);
+        $driver = 'DriverTest' . ucfirst($database['driver']);
         $database['driver'] = $driver;
         $database['namespace'] = 'Drupal\\driver_test\\Driver\\Database\\' . $driver;
         $database['autoload'] = "core/modules/system/tests/modules/driver_test/src/Driver/Database/$driver/";
@@ -57,7 +57,7 @@ protected function getDatabaseConnectionInfo() {
    */
   public function testDatabaseDriverModuleEnabled(): void {
     $driver = Database::getConnection()->driver();
-    if (!in_array($driver, ['DrivertestMysql', 'DrivertestPgsql'])) {
+    if (!in_array($driver, ['DriverTestMysql', 'DriverTestPgsql'])) {
       $this->markTestSkipped("This test does not support the {$driver} database driver.");
     }
 
diff --git a/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php b/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
index 4548ed42c3d9b2e723b6663be23fd768c319e407..39d4433abbc9ea50644cbde2e3633af000270fd2 100644
--- a/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
@@ -108,16 +108,16 @@ public static function providerConvertDbUrlToConnectionInfo() {
         FALSE,
       ],
       'MySQL contrib test driver without prefix' => [
-        'DrivertestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test',
+        'DriverTestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test',
         [
-          'driver' => 'DrivertestMysql',
+          'driver' => 'DriverTestMysql',
           'username' => 'test_user',
           'password' => 'test_pass',
           'host' => 'test_host',
           'database' => 'test_database',
           'port' => 3306,
-          'namespace' => 'Drupal\driver_test\Driver\Database\DrivertestMysql',
-          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/',
+          'namespace' => 'Drupal\driver_test\Driver\Database\DriverTestMysql',
+          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/',
           'dependencies' => [
             'mysql' => [
               'namespace' => 'Drupal\mysql',
@@ -132,17 +132,17 @@ public static function providerConvertDbUrlToConnectionInfo() {
         TRUE,
       ],
       'MySQL contrib test driver with prefix' => [
-        'DrivertestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test#bar',
+        'DriverTestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test#bar',
         [
-          'driver' => 'DrivertestMysql',
+          'driver' => 'DriverTestMysql',
           'username' => 'test_user',
           'password' => 'test_pass',
           'host' => 'test_host',
           'database' => 'test_database',
           'prefix' => 'bar',
           'port' => 3306,
-          'namespace' => 'Drupal\driver_test\Driver\Database\DrivertestMysql',
-          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/',
+          'namespace' => 'Drupal\driver_test\Driver\Database\DriverTestMysql',
+          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/',
           'dependencies' => [
             'mysql' => [
               'namespace' => 'Drupal\mysql',
@@ -157,16 +157,16 @@ public static function providerConvertDbUrlToConnectionInfo() {
         TRUE,
       ],
       'PostgreSQL contrib test driver without prefix' => [
-        'DrivertestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test',
+        'DriverTestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test',
         [
-          'driver' => 'DrivertestPgsql',
+          'driver' => 'DriverTestPgsql',
           'username' => 'test_user',
           'password' => 'test_pass',
           'host' => 'test_host',
           'database' => 'test_database',
           'port' => 5432,
-          'namespace' => 'Drupal\driver_test\Driver\Database\DrivertestPgsql',
-          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/',
+          'namespace' => 'Drupal\driver_test\Driver\Database\DriverTestPgsql',
+          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/',
           'dependencies' => [
             'mysql' => [
               'namespace' => 'Drupal\mysql',
@@ -181,17 +181,17 @@ public static function providerConvertDbUrlToConnectionInfo() {
         TRUE,
       ],
       'PostgreSQL contrib test driver with prefix' => [
-        'DrivertestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test#bar',
+        'DriverTestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test#bar',
         [
-          'driver' => 'DrivertestPgsql',
+          'driver' => 'DriverTestPgsql',
           'username' => 'test_user',
           'password' => 'test_pass',
           'host' => 'test_host',
           'database' => 'test_database',
           'prefix' => 'bar',
           'port' => 5432,
-          'namespace' => 'Drupal\driver_test\Driver\Database\DrivertestPgsql',
-          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/',
+          'namespace' => 'Drupal\driver_test\Driver\Database\DriverTestPgsql',
+          'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/',
           'dependencies' => [
             'mysql' => [
               'namespace' => 'Drupal\mysql',
@@ -368,11 +368,11 @@ public static function providerGetConnectionInfoAsUrl() {
       'prefix' => '',
       'host' => 'test_host',
       'port' => '3306',
-      'driver' => 'DrivertestMysql',
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysql',
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/',
+      'driver' => 'DriverTestMysql',
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysql',
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/',
     ];
-    $expected_url5 = 'DrivertestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test';
+    $expected_url5 = 'DriverTestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test';
 
     $info6 = [
       'database' => 'test_database',
@@ -381,11 +381,11 @@ public static function providerGetConnectionInfoAsUrl() {
       'prefix' => 'pre',
       'host' => 'test_host',
       'port' => '3306',
-      'driver' => 'DrivertestMysql',
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysql',
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/',
+      'driver' => 'DriverTestMysql',
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysql',
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/',
     ];
-    $expected_url6 = 'DrivertestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test#pre';
+    $expected_url6 = 'DriverTestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test#pre';
 
     $info7 = [
       'database' => 'test_database',
@@ -394,11 +394,11 @@ public static function providerGetConnectionInfoAsUrl() {
       'prefix' => '',
       'host' => 'test_host',
       'port' => '5432',
-      'driver' => 'DrivertestPgsql',
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DrivertestPgsql',
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/',
+      'driver' => 'DriverTestPgsql',
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTestPgsql',
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/',
     ];
-    $expected_url7 = 'DrivertestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test';
+    $expected_url7 = 'DriverTestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test';
 
     $info8 = [
       'database' => 'test_database',
@@ -407,11 +407,11 @@ public static function providerGetConnectionInfoAsUrl() {
       'prefix' => 'pre',
       'host' => 'test_host',
       'port' => '5432',
-      'driver' => 'DrivertestPgsql',
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DrivertestPgsql',
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/',
+      'driver' => 'DriverTestPgsql',
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTestPgsql',
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestPgsql/',
     ];
-    $expected_url8 = 'DrivertestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test#pre';
+    $expected_url8 = 'DriverTestPgsql://test_user:test_pass@test_host:5432/test_database?module=driver_test#pre';
 
     $info9 = [
       'database' => 'test_database',
@@ -420,9 +420,9 @@ public static function providerGetConnectionInfoAsUrl() {
       'prefix' => '',
       'host' => 'test_host',
       'port' => '3306',
-      'driver' => 'DrivertestMysql',
-      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysql',
-      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/',
+      'driver' => 'DriverTestMysql',
+      'namespace' => 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysql',
+      'autoload' => 'core/modules/system/tests/modules/driver_test/src/Driver/Database/DriverTestMysql/',
       'dependencies' => [
         'mysql' => [
           'namespace' => 'Drupal\mysql',
@@ -434,7 +434,7 @@ public static function providerGetConnectionInfoAsUrl() {
         ],
       ],
     ];
-    $expected_url9 = 'DrivertestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test';
+    $expected_url9 = 'DriverTestMysql://test_user:test_pass@test_host:3306/test_database?module=driver_test';
 
     return [
       [$info1, $expected_url1],
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
index 1edc10dbe649e1e92d2793d73232e876aa73a46c..c89943346579c1e9e6733b863451164dc02b5524 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
@@ -71,27 +71,27 @@ public function testProcess(): void {
     $this->backendPass->process($container);
     $this->assertEquals($prefix . 'Default', get_class($container->get('service')));
 
-    // Set the mysql and the DrivertestMysql service, now the DrivertestMysql
+    // Set the mysql and the DriverTestMysql service, now the DriverTestMysql
     // service, as it is the driver override, should be used.
-    $container = $this->getDrivertestMysqlContainer($service);
+    $container = $this->getDriverTestMysqlContainer($service);
     $container->setDefinition('mysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassMysql'));
-    $container->setDefinition('DrivertestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDrivertestMysql'));
+    $container->setDefinition('DriverTestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDriverTestMysql'));
     $this->backendPass->process($container);
-    $this->assertEquals($prefix . 'DrivertestMysql', get_class($container->get('service')));
+    $this->assertEquals($prefix . 'DriverTestMysql', get_class($container->get('service')));
 
     // Set the mysql service, now the mysql service, as it is the database_type
     // override, should be used.
-    $container = $this->getDrivertestMysqlContainer($service);
+    $container = $this->getDriverTestMysqlContainer($service);
     $container->setDefinition('mysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassMysql'));
     $this->backendPass->process($container);
     $this->assertEquals($prefix . 'Mysql', get_class($container->get('service')));
 
-    // Set the DrivertestMysql service, now the DrivertestMysql service, as it
+    // Set the DriverTestMysql service, now the DriverTestMysql service, as it
     // is the driver override, should be used.
-    $container = $this->getDrivertestMysqlContainer($service);
-    $container->setDefinition('DrivertestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDrivertestMysql'));
+    $container = $this->getDriverTestMysqlContainer($service);
+    $container->setDefinition('DriverTestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDriverTestMysql'));
     $this->backendPass->process($container);
-    $this->assertEquals($prefix . 'DrivertestMysql', get_class($container->get('service')));
+    $this->assertEquals($prefix . 'DriverTestMysql', get_class($container->get('service')));
   }
 
   /**
@@ -133,7 +133,7 @@ protected function getMysqlContainer($service) {
   }
 
   /**
-   * Creates a container with a DrivertestMysql database mock definition in it.
+   * Creates a container with a DriverTestMysql database mock definition in it.
    *
    * This is necessary because the container clone does not clone the parameter
    * bag so the setParameter() call effects the parent container as well.
@@ -143,10 +143,10 @@ protected function getMysqlContainer($service) {
    *
    * @return \Symfony\Component\DependencyInjection\ContainerBuilder
    */
-  protected function getDrivertestMysqlContainer($service) {
+  protected function getDriverTestMysqlContainer($service) {
     $container = new ContainerBuilder();
     $container->setDefinition('service', $service);
-    $mock = $this->getMockBuilder('Drupal\driver_test\Driver\Database\DrivertestMysql\Connection')->onlyMethods([])->disableOriginalConstructor()->getMock();
+    $mock = $this->getMockBuilder('Drupal\driver_test\Driver\Database\DriverTestMysql\Connection')->onlyMethods([])->disableOriginalConstructor()->getMock();
     $container->set('database', $mock);
     return $container;
   }
@@ -165,5 +165,5 @@ class ServiceClassMariaDb extends ServiceClassMysql {
 class ServiceClassSqlite extends ServiceClassDefault {
 }
 
-class ServiceClassDrivertestMysql extends ServiceClassDefault {
+class ServiceClassDriverTestMysql extends ServiceClassDefault {
 }
diff --git a/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php b/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
index 3d46565e042727bb1f7ca7f4b432bbf1ddc79362..5c48fd026d595db6fd61ff2da591d19a7ad543f7 100644
--- a/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
@@ -35,9 +35,9 @@ public static function providerDatabaseDrivers(): array {
       ['mysql', 'mysql', 'Drupal\\mysql\\Driver\\Database\\mysql'],
       ['pgsql', 'pgsql', 'Drupal\\pgsql\\Driver\\Database\\pgsql'],
       ['sqlite', 'sqlite', 'Drupal\\sqlite\\Driver\\Database\\sqlite'],
-      ['DrivertestMysql', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysql'],
-      ['DrivertestPgsql', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DrivertestPgsql'],
-      ['DrivertestMysqlDeprecatedVersion', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DrivertestMysqlDeprecatedVersion'],
+      ['DriverTestMysql', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysql'],
+      ['DriverTestPgsql', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DriverTestPgsql'],
+      ['DriverTestMysqlDeprecatedVersion', 'driver_test', 'Drupal\\driver_test\\Driver\\Database\\DriverTestMysqlDeprecatedVersion'],
     ];
   }