diff --git a/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php b/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
index cda1c15..8aee8ab 100644
--- a/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
+++ b/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
@@ -50,11 +50,27 @@ class Post extends Node implements ContentEntityBundleInterface {
   }
 
   public function toTweet(): string {
-    // TODO: Add tags.
-
-    $parts = [$this->label(), $this->url('canonical', ['absolute' => TRUE])];
+    $parts = [
+      $this->label(),
+      $this->url('canonical', ['absolute' => TRUE]),
+      $this->convertTermsToHashtags(),
+    ];
 
     return implode(PHP_EOL . PHP_EOL, $parts);
   }
 
+  private function convertTermsToHashtags(): string {
+    return $this->getTags()
+      ->map(fn(Term $term) => $this->convertTermToHashtag($term))
+      ->implode(' ');
+  }
+
+  private function convertTermToHashtag(Term $tag): string {
+    $tagName = strtolower($tag->label());
+    $tagName = "#{$tagName}";
+    $tagName = str_replace(' ', '-', $tagName);
+
+    return $tagName;
+  }
+
 }
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 43c8b82..f9df752 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
@@ -8,6 +8,7 @@ use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
 use Drupal\node\Entity\Node;
 use Drupal\node\NodeInterface;
 use Drupal\opdavies_blog\Entity\Node\Post;
+use Drupal\taxonomy\Entity\Term;
 
 final class PostTest extends EntityKernelTestBase {
 
@@ -43,6 +44,12 @@ final class PostTest extends EntityKernelTestBase {
   public function it_converts_a_post_to_a_tweet(): void {
     /** @var Post $post */
     $post = Node::create([
+      'field_tags' => [
+        Term::create(['vid' => 'tags', 'name' => 'Automated testing']),
+        Term::create(['vid' => 'tags', 'name' => 'DDEV']),
+        Term::create(['vid' => 'tags', 'name' => 'Drupal']),
+        Term::create(['vid' => 'tags', 'name' => 'PHP']),
+      ],
       'status' => NodeInterface::PUBLISHED,
       'title' => 'Creating a custom PHPUnit command for DDEV',
       'type' => 'post',
@@ -53,6 +60,8 @@ final class PostTest extends EntityKernelTestBase {
     Creating a custom PHPUnit command for DDEV
 
     http://localhost/node/1
+
+    #automated-testing #ddev #drupal #php
     EOF;
 
     $this->assertSame($expected, $post->toTweet());
@@ -61,6 +70,8 @@ final class PostTest extends EntityKernelTestBase {
   protected function setUp() {
     parent::setUp();
 
+    $this->installEntitySchema('taxonomy_term');
+
     $this->installConfig(['opdavies_blog_test']);
   }