diff --git a/core/modules/comment/tests/src/Functional/CommentInterfaceTest.php b/core/modules/comment/tests/src/Functional/CommentInterfaceTest.php
index a9001e8d4058386dd880ddf81582655dd3154c4a..c9c6eb0cd8f0fb42efeb4c41a7f7ba4d968d1c5f 100644
--- a/core/modules/comment/tests/src/Functional/CommentInterfaceTest.php
+++ b/core/modules/comment/tests/src/Functional/CommentInterfaceTest.php
@@ -101,7 +101,8 @@ public function testCommentInterface() {
 
     // Test changing the comment author to "Anonymous".
     $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), ['uid' => '']);
-    $this->assertTrue($comment->getAuthorName() == t('Anonymous') && $comment->getOwnerId() == 0, 'Comment author successfully changed to anonymous.');
+    $this->assertTrue($comment->getAuthorName() == 'Anonymous', 'Comment author successfully changed to anonymous.');
+    $this->assertTrue($comment->getOwnerId() == 0, 'Comment author successfully changed to anonymous.');
 
     // Test changing the comment author to an unverified user.
     $random_name = $this->randomMachineName();
diff --git a/core/modules/field/tests/src/Functional/FormTest.php b/core/modules/field/tests/src/Functional/FormTest.php
index 37aa822ed47220b72f3992beeed99d0631f9ab49..e443ccabcb82f7875d922d4369e2813badd0e40f 100644
--- a/core/modules/field/tests/src/Functional/FormTest.php
+++ b/core/modules/field/tests/src/Functional/FormTest.php
@@ -272,7 +272,7 @@ public function testFieldFormUnlimited() {
 
     // Check if aria-describedby attribute is placed on multiple value widgets.
     $elements = $this->xpath('//table[@id="field-unlimited-values" and @aria-describedby="edit-field-unlimited--description"]');
-    $this->assertTrue(isset($elements[0]), t('aria-describedby attribute is properly placed on multiple value widgets.'));
+    $this->assertTrue(isset($elements[0]), 'aria-describedby attribute is properly placed on multiple value widgets.');
 
     // Press 'add more' button -> 2 widgets.
     $this->drupalPostForm(NULL, [], t('Add another item'));
diff --git a/core/modules/language/tests/src/Functional/LanguageSwitchingTest.php b/core/modules/language/tests/src/Functional/LanguageSwitchingTest.php
index 25848e7882d093aa42bce82e4d682edd03d00459..025f07a5b4281f1388e1cf98cf0bd57cd4b1bbaa 100644
--- a/core/modules/language/tests/src/Functional/LanguageSwitchingTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageSwitchingTest.php
@@ -276,12 +276,12 @@ public function testLanguageBodyClass() {
     // Check if the default (English) admin/config page has the right class.
     $this->drupalGet('admin/config');
     $class = $this->xpath('//body[contains(@class, :class)]', [':class' => $searched_class]);
-    $this->assertTrue(isset($class[0]), t('The path-admin class appears on default language.'));
+    $this->assertTrue(isset($class[0]), 'The path-admin class appears on default language.');
 
     // Check if the French admin/config page has the right class.
     $this->drupalGet('fr/admin/config');
     $class = $this->xpath('//body[contains(@class, :class)]', [':class' => $searched_class]);
-    $this->assertTrue(isset($class[0]), t('The path-admin class same as on default language.'));
+    $this->assertTrue(isset($class[0]), 'The path-admin class same as on default language.');
 
     // The testing profile sets the user/login page as the frontpage. That
     // redirects authenticated users to their profile page, so check with an
@@ -316,17 +316,17 @@ protected function doTestLanguageLinkActiveClassAuthenticated() {
     // Language code 'none' link should be active.
     $langcode = 'none';
     $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', [':id' => 'no_lang_link', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.');
 
     // Language code 'en' link should be active.
     $langcode = 'en';
     $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'en_link', ':lang' => 'en', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.');
 
     // Language code 'fr' link should not be active.
     $langcode = 'fr';
     $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'fr_link', ':lang' => 'fr', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.');
 
     // Verify that drupalSettings contains the correct values.
     $settings = $this->getDrupalSettings();
@@ -341,17 +341,17 @@ protected function doTestLanguageLinkActiveClassAuthenticated() {
     // Language code 'none' link should be active.
     $langcode = 'none';
     $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', [':id' => 'no_lang_link', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.');
 
     // Language code 'en' link should not be active.
     $langcode = 'en';
     $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'en_link', ':lang' => 'en', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.');
 
     // Language code 'fr' link should be active.
     $langcode = 'fr';
     $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'fr_link', ':lang' => 'fr', ':path' => $path]);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.');
 
     // Verify that drupalSettings contains the correct values.
     $settings = $this->getDrupalSettings();
@@ -377,17 +377,17 @@ protected function doTestLanguageLinkActiveClassAnonymous() {
     // Language code 'none' link should be active.
     $langcode = 'none';
     $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'no_lang_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is marked active.');
 
     // Language code 'en' link should be active.
     $langcode = 'en';
     $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'en_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is marked active.');
 
     // Language code 'fr' link should not be active.
     $langcode = 'fr';
     $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', [':id' => 'fr_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is NOT marked active.');
 
     // Test links generated by the link generator on a French page.
     $current_language = 'French';
@@ -396,17 +396,17 @@ protected function doTestLanguageLinkActiveClassAnonymous() {
     // Language code 'none' link should be active.
     $langcode = 'none';
     $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'no_lang_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is marked active.');
 
     // Language code 'en' link should not be active.
     $langcode = 'en';
     $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', [':id' => 'en_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is NOT marked active.');
 
     // Language code 'fr' link should be active.
     $langcode = 'fr';
     $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'fr_link', ':class' => 'is-active']);
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
+    $this->assertTrue(isset($links[0]), 'A link generated by $function_name to the current $current_language page with langcode $langcode is marked active.');
   }
 
   /**
diff --git a/core/modules/search/tests/src/Functional/SearchNodeUpdateAndDeletionTest.php b/core/modules/search/tests/src/Functional/SearchNodeUpdateAndDeletionTest.php
index c15efe51546a145ed721e2bb3a6b86f76e37ae79..90eafbc35487801f23400b419b2fd686b2ae2a2f 100644
--- a/core/modules/search/tests/src/Functional/SearchNodeUpdateAndDeletionTest.php
+++ b/core/modules/search/tests/src/Functional/SearchNodeUpdateAndDeletionTest.php
@@ -118,7 +118,7 @@ public function testSearchIndexUpdateOnNodeDeletion() {
       ->condition('word', 'dragons')
       ->execute()
       ->fetchField();
-    $this->assertFalse($search_index_dataset, t('Node info successfully removed from search_index'));
+    $this->assertFalse($search_index_dataset, 'Node info successfully removed from search_index');
 
     // Search again to verify the node doesn't appear anymore.
     $this->drupalPostForm('search/node', $edit, t('Search'));
diff --git a/core/modules/system/tests/src/Functional/Form/ElementsLabelsTest.php b/core/modules/system/tests/src/Functional/Form/ElementsLabelsTest.php
index ea9cc48ba24947139fa9682497bcbba207b47c95..5a5c16aee70cd7fb66a3b52ace87cc6f7a3483aa 100644
--- a/core/modules/system/tests/src/Functional/Form/ElementsLabelsTest.php
+++ b/core/modules/system/tests/src/Functional/Form/ElementsLabelsTest.php
@@ -123,13 +123,13 @@ public function testFormDescriptions() {
     $field_id = 'edit-form-textfield-test-description-after';
     $description_id = $field_id . '--description';
     $elements = $this->xpath('//input[@id="' . $field_id . '" and @aria-describedby="' . $description_id . '"]/following-sibling::div[@id="' . $description_id . '"]');
-    $this->assertTrue(isset($elements[0]), t('Properly places the #description element after the form item.'));
+    $this->assertTrue(isset($elements[0]), 'Properly places the #description element after the form item.');
 
     // Check #description placement with #description_display='before'.
     $field_id = 'edit-form-textfield-test-description-before';
     $description_id = $field_id . '--description';
     $elements = $this->xpath('//input[@id="' . $field_id . '" and @aria-describedby="' . $description_id . '"]/preceding-sibling::div[@id="' . $description_id . '"]');
-    $this->assertTrue(isset($elements[0]), t('Properly places the #description element before the form item.'));
+    $this->assertTrue(isset($elements[0]), 'Properly places the #description element before the form item.');
 
     // Check if the class is 'visually-hidden' on the form element description
     // for the option with #description_display='invisible' and also check that
@@ -137,7 +137,7 @@ public function testFormDescriptions() {
     $field_id = 'edit-form-textfield-test-description-invisible';
     $description_id = $field_id . '--description';
     $elements = $this->xpath('//input[@id="' . $field_id . '" and @aria-describedby="' . $description_id . '"]/following-sibling::div[contains(@class, "visually-hidden")]');
-    $this->assertTrue(isset($elements[0]), t('Properly renders the #description element visually-hidden.'));
+    $this->assertTrue(isset($elements[0]), 'Properly renders the #description element visually-hidden.');
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php b/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
index 0ad3dd9c98feb932df222ba8ca7678fd9a694eac..73ef33d732d95f9561f4c616f5717573c69538b9 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
@@ -379,7 +379,7 @@ public function testFieldUpdateFailure() {
     ];
     $schema = Database::getConnection()->schema();
     foreach ($tables as $table_name) {
-      $this->assertTrue($schema->tableExists($table_name), t('Table %table exists.', ['%table' => $table_name]));
+      $this->assertTrue($schema->tableExists($table_name), 'Table $table_name exists.');
     }
   }
 
@@ -405,8 +405,8 @@ public function testFieldUpdateIndexesWithData() {
 
     // Verify the indexes we will create do not exist yet.
     foreach ($tables as $table) {
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value'), t("No index named value exists in @table", ['@table' => $table]));
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value_format'), t("No index named value_format exists in @table", ['@table' => $table]));
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value'), 'No index named value exists in $table');
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value_format'), 'No index named value_format exists in $table');
     }
 
     // Add data so the table cannot be dropped.
@@ -424,15 +424,15 @@ public function testFieldUpdateIndexesWithData() {
     $field_storage->setIndexes(['value' => [['value', 255]]]);
     $field_storage->save();
     foreach ($tables as $table) {
-      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value created in @table", ['@table' => $table]));
+      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), "Index on value created in @table", ['@table' => $table]);
     }
 
     // Add a different index, removing the existing custom one.
     $field_storage->setIndexes(['value_format' => [['value', 127], ['format', 127]]]);
     $field_storage->save();
     foreach ($tables as $table) {
-      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value_format"), t("Index on value_format created in @table", ['@table' => $table]));
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value removed in @table", ['@table' => $table]));
+      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value_format"), "Index on value_format created in @table", ['@table' => $table]);
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), "Index on value removed in @table", ['@table' => $table]);
     }
 
     // Verify that the tables were not dropped in the process.
diff --git a/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
index 020d6134e4d9543cd07681651abda312d4d419a8..6e715deb0acda2fc7745c931761e89f2e62f3f8b 100644
--- a/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
@@ -37,7 +37,7 @@ public function testFileCheckLocalDirectoryHandling() {
     $child_path = $parent_path . DIRECTORY_SEPARATOR . $child;
     /** @var \Drupal\Core\File\FileSystemInterface $file_system */
     $file_system = \Drupal::service('file_system');
-    $this->assertTrue($file_system->mkdir($child_path, 0775, TRUE), t('No error reported when creating new local directories.'), 'File');
+    $this->assertTrue($file_system->mkdir($child_path, 0775, TRUE), 'No error reported when creating new local directories.');
 
     // Ensure new directories also exist.
     $this->assertDirectoryExists($parent_path);