Dave Long
--- a/core/modules/migrate/tests/modules/migrate_high_water_test/src/Plugin/migrate/source/HighWaterTest.php
+++ b/core/modules/migrate/tests/modules/migrate_high_water_test/src/Plugin/migrate/source/HighWaterTest.php
   */
  public function fields() {
    $fields = [
-      'id' => $this->t('Id'),
-      'title' => $this->t('Title'),
-      'changed' => $this->t('Changed'),
+      'id' => 'Id',
+      'title' => 'Title',
+      'changed' => 'Changed',
--- a/core/modules/views/tests/src/Kernel/Entity/EntityViewsDataTest.php
+++ b/core/modules/views/tests/src/Kernel/Entity/EntityViewsDataTest.php

    // Base fields for the test entity types.
    $this->commonBaseFields['name'] = BaseFieldDefinition::create('string')
-      ->setLabel(t('Name'))
-      ->setDescription(t('The name of the test entity.'))
+      ->setLabel('Name')
+      ->setDescription('The name of the test entity.')
--- a/core/tests/Drupal/KernelTests/Core/Datetime/DatelistElementFormTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Datetime/DatelistElementFormTest.php

    $form['submit'] = [
      '#type' => 'submit',
-      '#value' => t('Submit'),
--- a/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php
+++ b/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php
    $this->assertEquals(1, $violations->count());

    // Test translating violation messages.
-    $message = t('This value should be %limit or more.', ['%limit' => 5]);
+    $message = 'This value should be 5 or more.';