diff --git a/boards/models.py b/boards/models.py
--- a/boards/models.py
+++ b/boards/models.py
@@ -178,8 +178,8 @@ class PostManager(models.Manager):
         """Connect replies to a post to show them as a refmap"""
 
         for reply_number in re.finditer(REGEX_REPLY, post.text.raw):
-            id = reply_number.group(1)
-            ref_post = self.filter(id=id)
+            post_id = reply_number.group(1)
+            ref_post = self.filter(id=post_id)
             if ref_post.count() > 0:
                 referenced_post = ref_post[0]
                 referenced_post.referenced_posts.add(post)
diff --git a/boards/tests.py b/boards/tests.py
--- a/boards/tests.py
+++ b/boards/tests.py
@@ -39,6 +39,15 @@ class BoardTests(TestCase):
 
         self.assertFalse(Post.objects.exists(post_id))
 
+    def test_post_to_thread(self):
+        op = self._create_post()
+        post = Post.objects.create_post("", "", thread=op)
+
+        self.assertIsNotNone(post, 'Reply to thread wasn\'t created')
+        self.assertEqual(op.last_edit_time, post.pub_time,
+                         'Post\'s create time doesn\'t match thread last edit'
+                         ' time')
+
     def test_delete_posts_by_ip(self):
         post = self._create_post()
         post_id = post.id