diff --git a/web/modules/custom/opdavies_blog/tests/src/Kernel/Entity/Node/PostTest.php b/web/modules/custom/opdavies_blog/tests/src/Kernel/Entity/Node/PostTest.php
index 34bff62..43c8b82 100644
--- a/web/modules/custom/opdavies_blog/tests/src/Kernel/Entity/Node/PostTest.php
+++ b/web/modules/custom/opdavies_blog/tests/src/Kernel/Entity/Node/PostTest.php
@@ -6,6 +6,7 @@ namespace Drupal\Tests\custom\Kernel\Entity\Node;
 
 use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
 use Drupal\node\Entity\Node;
+use Drupal\node\NodeInterface;
 use Drupal\opdavies_blog\Entity\Node\Post;
 
 final class PostTest extends EntityKernelTestBase {
@@ -38,6 +39,25 @@ final class PostTest extends EntityKernelTestBase {
     $this->assertTrue($post->hasTweet());
   }
 
+  /** @test */
+  public function it_converts_a_post_to_a_tweet(): void {
+    /** @var Post $post */
+    $post = Node::create([
+      'status' => NodeInterface::PUBLISHED,
+      'title' => 'Creating a custom PHPUnit command for DDEV',
+      'type' => 'post',
+    ]);
+    $post->save();
+
+    $expected = <<<EOF
+    Creating a custom PHPUnit command for DDEV
+
+    http://localhost/node/1
+    EOF;
+
+    $this->assertSame($expected, $post->toTweet());
+  }
+
   protected function setUp() {
     parent::setUp();