diff --git a/tests/src/Functional/HelpTopicTest.php b/tests/src/Functional/HelpTopicTest.php
index c318a6f..1276884 100644
--- a/tests/src/Functional/HelpTopicTest.php
+++ b/tests/src/Functional/HelpTopicTest.php
@@ -2,7 +2,9 @@
 
 namespace Drupal\Tests\config_help\Functional;
 
+use Drupal\Core\Serialization\Yaml;
 use Drupal\Tests\BrowserTestBase;
+use Drupal\config_help\Entity\HelpTopic;
 
 /**
  * Verifies help topic display and user access to help based on permissions.
@@ -114,6 +116,70 @@ class HelpTopicTest extends BrowserTestBase {
     $session->linkNotExists('ABC Help Test');
   }
 
+ /**
+   * Tests export and import of help topics, and topic create from array.
+   */
+  public function testTopicExportImport() {
+    // Create a help topic entity.
+    $values = [
+      'id' => 'foo',
+      'label' => 'Foo',
+      'body' => [
+        [
+          'type' => 'heading',
+          'text' => 'Greetings',
+        ],
+        [
+          'type' => 'paragraph',
+          'text' => 'Hello, world!',
+        ],
+      ],
+      'top_level' => TRUE,
+      'locked' => TRUE,
+      'related' => ['config_help'],
+      'list_on' => ['config_help_form'],
+    ];
+    // Set the dependecies after creation, because it's an odd bit of the
+    // configuration.
+    $dependencies = [
+      'module' => ['config_help', 'filter'],
+      'theme' => ['classy', 'bartik'],
+    ];
+
+    /** @var \Drupal\config_help\HelpTopicInterface $foo */
+    $foo = HelpTopic::create($values);
+    $foo->setEnforcedDependencies($dependencies);
+
+    // Export and import the topic.
+    $foo_export = Yaml::encode($foo->toArray());
+    $bar = HelpTopic::create(Yaml::decode($foo_export));
+
+    // Verify that everything is OK.
+    $to_check = [
+      // This is an array of method name => component in $values, except
+      // dependencies, which are checked separately.
+      'id' => 'id',
+      'label' => 'label',
+      'getBody' => 'body',
+      'isTopLevel' => 'top_level',
+      'isLocked' => 'locked',
+      'getRelated' => 'related',
+      'getListOn' => 'list_on',
+      'getEnforcedDependencies' => FALSE,
+    ];
+
+    // Verify that the initial create got the right values, and that after
+    // export/import, the values are the same.
+    foreach ($to_check as $method => $component) {
+      if ($component) {
+        $this->assertEqual(call_user_func([$foo, $method]), $values[$component], 'Data for ' . $component . ' is the same as method ' . $method);
+      }
+      $this->assertEqual(call_user_func([$foo, $method]), call_user_func([$bar, $method]), 'Method ' . $method . ' is the same before and after export/import');
+    }
+    $this->assertEqual($foo->getEnforcedDependencies(), $dependencies, 'Data for dependencies is the same as method getEnforcedDependencies');
+
+  }
+
   /**
    * Verifies the logged in user has access to various help links and pages.
    *