diff --git a/core/tests/Drupal/KernelTests/Core/Common/DrupalSetMessageLoadsCssTest.php b/core/tests/Drupal/KernelTests/Core/Common/DrupalSetMessageLoadsCssTest.php
new file mode 100644
index 0000000..5250978
--- /dev/null
+++ b/core/tests/Drupal/KernelTests/Core/Common/DrupalSetMessageLoadsCssTest.php
@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\KernelTests\Core\Common\DrupalSetMessageLoadsCssTest.
+ */
+
+namespace Drupal\KernelTests\Core\Common;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests CSS classes on comments.
+ *
+ * @group standard
+ */
+class DrupalSetMessageLoadsCssTest extends WebTestBase {
+
+  /**
+   * The profile to install as a basis for testing.
+   *
+   * @var string
+   */
+
+  /**
+   * Check that a page does not load message assets when unrequired.
+   */
+  public function testDrupalSetMessage() {
+
+    // Get the frontpage.
+    $this->drupalGet("<front>");
+    // Check that message assets are loaded.
+    $this->assertRaw("core/themes/classy/css/components/messages.css", "Message CSS assets should be loaded.")
+
+    // Display a message.
+    drupal_set_message(t('A message: @foo', ['@foo' => 'bar']));
+
+    // Get the frontpage.
+    $this->drupalGet("<front>");
+    // Check that messages are display.
+    $this->assertRaw("A message:", "The Drupal message should be displayed.");
+
+    // Check that message assets are not loaded.
+    $this->assertNoRaw("message.css", "Message CSS assets should not be loaded.")
+  }
+}