--- a/pylib/mozreview/mozreview/signal_handlers.py
+++ b/pylib/mozreview/mozreview/signal_handlers.py
@@ -23,16 +23,17 @@ from reviewboard.extensions.hooks import
     SignalHook,
 )
 from reviewboard.reviews.models import (
     Review,
     ReviewRequest,
     ReviewRequestDraft,
 )
 from reviewboard.reviews.signals import (
+    reply_publishing,
     review_publishing,
     review_request_closed,
     review_request_publishing,
     review_request_reopened,
 )
 
 from mozreview.bugzilla.attachments import (
     update_bugzilla_attachments,
@@ -145,16 +146,22 @@ def initialize_signal_handlers(extension
         sender=Review)
 
     SignalHook(
         extension,
         review_publishing,
         on_review_publishing,
         sandbox_errors=False)
 
+    SignalHook(
+        extension,
+        reply_publishing,
+        on_reply_publishing,
+        sandbox_errors=False)
+
 
 def post_save_review_request_draft(sender, **kwargs):
     """Handle post_save for a ReviewRequestDraft."""
     draft = kwargs["instance"]
 
     if kwargs["created"] and not kwargs["raw"]:
         copy_commit_data(draft)
 
@@ -656,8 +663,35 @@ def on_review_publishing(user, review, *
                 commented = b.r_plus_attachment(bug_id, review.user.email,
                                                 diff_url, comment)
             else:
                 commented = b.cancel_review_request(bug_id, review.user.email,
                                                     diff_url, comment)
 
         if comment and not commented:
             b.post_comment(bug_id, comment)
+
+
+def get_reply_url(reply, site=None, siteconfig=None):
+    """ Get the URL for a reply to a review.
+
+    Since replies can have multiple comments, we can't link to a specific
+    comment, so we link to the parent review which the reply is targeted at.
+    """
+    return get_obj_url(reply.base_reply_to, site=site, siteconfig=siteconfig)
+
+
+@bugzilla_to_publish_errors
+def on_reply_publishing(user, reply, **kwargs):
+    review_request = reply.review_request
+    logger.info('Posting bugzilla reply for review request %s' % (
+                review_request.id))
+
+    # skip review requests that were not pushed
+    if not is_pushed(review_request):
+        return
+
+    bug_id = int(review_request.get_bug_list()[0])
+    b = Bugzilla(get_bugzilla_api_key(user))
+
+    url = get_reply_url(reply)
+    comment = build_plaintext_review(reply, url, {"user": user})
+    b.post_comment(bug_id, comment)

--- a/pylib/rbbz/rbbz/extension.py
+++ b/pylib/rbbz/rbbz/extension.py
@@ -1,65 +1,11 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-import logging
-
 from reviewboard.extensions.base import Extension
-from reviewboard.extensions.hooks import SignalHook
-from reviewboard.reviews.signals import (
-    reply_publishing,
-)
-
-from mozreview.bugzilla.client import Bugzilla
-from mozreview.bugzilla.errors import (
-    bugzilla_to_publish_errors,
-)
-from mozreview.diffs import build_plaintext_review
-from mozreview.extra_data import (
-    is_pushed,
-)
-from mozreview.models import (
-    get_bugzilla_api_key,
-)
-from mozreview.rb_utils import (
-    get_obj_url,
-)
-
-logger = logging.getLogger(__name__)
 
 
 class BugzillaExtension(Extension):
 
     def initialize(self):
-        # Any abortable signal hooks that talk to Bugzilla should have
-        # sandbox_errors=False, since we don't want to complete the action if
-        # updating Bugzilla failed for any reason.
-        SignalHook(self, reply_publishing, on_reply_publishing,
-                   sandbox_errors=False)
-
-
-def get_reply_url(reply, site=None, siteconfig=None):
-    """ Get the URL for a reply to a review.
-
-    Since replies can have multiple comments, we can't link to a specific
-    comment, so we link to the parent review which the reply is targeted at.
-    """
-    return get_obj_url(reply.base_reply_to, site=site, siteconfig=siteconfig)
-
-
-@bugzilla_to_publish_errors
-def on_reply_publishing(user, reply, **kwargs):
-    review_request = reply.review_request
-    logger.info('Posting bugzilla reply for review request %s' % (
-                review_request.id))
-
-    # skip review requests that were not pushed
-    if not is_pushed(review_request):
-        return
-
-    bug_id = int(review_request.get_bug_list()[0])
-    b = Bugzilla(get_bugzilla_api_key(user))
-
-    url = get_reply_url(reply)
-    comment = build_plaintext_review(reply, url, {"user": user})
-    b.post_comment(bug_id, comment)
+        pass