diff --git a/core/modules/simpletest/src/Tests/IdiotTest.php b/core/modules/simpletest/src/Tests/IdiotTest.php
new file mode 100644
index 0000000..4cd7f76
--- /dev/null
+++ b/core/modules/simpletest/src/Tests/IdiotTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\simpletest\Tests;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests stuff.
+ *
+ * @group simpletest
+ */
+class IdiotTest extends WebTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['system'];
+
+  /**
+   * Tests stuff.
+   */
+  public function testCase() {
+    $this->drupalGet('user/login');
+    $this->assertText('Log in');
+    $this->assertText('log in');
+    $this->assertText('LOG IN');
+  }
+
+}
diff --git a/core/tests/Drupal/FunctionalTests/IdiotTest.php b/core/tests/Drupal/FunctionalTests/IdiotTest.php
new file mode 100644
index 0000000..18010fc
--- /dev/null
+++ b/core/tests/Drupal/FunctionalTests/IdiotTest.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Drupal\FunctionalTests;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests stuff.
+ *
+ * @group browsertestbase
+ */
+class IdiotTest extends BrowserTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['system'];
+
+  /**
+   * Tests stuff.
+   */
+  public function testCase() {
+    $this->drupalGet('user/login');
+    $this->assertSession()->pageTextContains('Log in');
+    $this->assertSession()->pageTextContains('log in');
+    $this->assertSession()->pageTextContains('LOG IN');
+    $this->assertText('Log in');
+    $this->assertText('log in');
+    $this->assertText('LOG IN');
+  }
+
+}