diff --git a/core/tests/Drupal/Tests/Core/Annotation/ContextDefinitionTest.php b/core/tests/Drupal/Tests/Core/Annotation/ContextDefinitionTest.php
new file mode 100644
index 0000000..7f8382f
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Annotation/ContextDefinitionTest.php
@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * @file Contains \Drupal\Tests\Core\Annotation\ContextDefinitionTest.
+ */
+
+namespace Drupal\Tests\Core\Annotation;
+
+use Drupal\Core\Annotation\ContextDefinition;
+use Drupal\Core\Annotation\Translation;
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Annotation\ContextDefinition
+ * @group Annotation
+ */
+class ContextDefinitionTest extends UnitTestCase {
+
+  /**
+   * The translation manager used for testing.
+   *
+   * @var \Drupal\Core\StringTranslation\TranslationInterface|\PHPUnit_Framework_MockObject_MockObject
+   */
+  protected $translationManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    $this->translationManager = $this->getStringTranslationStub();
+  }
+
+  /**
+   * Test the ContextDefinition Annotation.
+   */
+  public function testContextDefinitionAnnotation() {
+    $container = new ContainerBuilder();
+    $container->set('string_translation', $this->translationManager);
+    \Drupal::setContainer($container);
+
+    $values = [
+      'value' => 'entity:node',
+      //'label' => new Translation(['value' => 'test']),
+      'label' => 'test',
+      'description' => 'test',
+    ];
+    $context_definition = new ContextDefinition($values);
+    $definition = $context_definition->get();
+    //throw new \Exception(print_r(, TRUE));
+    // If the label or description are not a Translation annotation instance,
+    // it should be replaced by NULL.
+    $this->assertNull($definition->getLabel());
+    $this->assertNull($definition->getDescription());
+
+    $values = [
+      'value' => 'entity:node',
+      'label' => new Translation(['value' => 'test']),
+      'description' => new Translation(['value' => 'test']),
+    ];
+    $context_definition = new ContextDefinition($values);
+    $definition = $context_definition->get();
+    //throw new \Exception(print_r(, TRUE));
+    // If the label or description are a Translation annotation instance, the
+    // translated string should be returned.
+    $this->assertEquals('test', $definition->getLabel());
+    $this->assertEquals('test', $definition->getDescription());
+  }
+
+}