diff --git a/zerver/lib/webhooks/git.py b/zerver/lib/webhooks/git.py
index dda86c52d3..e275b89446 100644
--- a/zerver/lib/webhooks/git.py
+++ b/zerver/lib/webhooks/git.py
@@ -190,7 +190,9 @@ def get_all_committers(commits_data):
     for commit in commits_data:
         committers[commit['name']] += 1
 
-    committers_items = sorted(list(committers.items()), key=lambda item: item[1], reverse=True)  # type: List[Tuple[str, int]]
+    # Sort by commit count, breaking ties alphabetically.
+    committers_items = sorted(list(committers.items()),
+                              key=lambda item: (-item[1], item[0]))  # type: List[Tuple[str, int]]
     committers_values = [c_i[1] for c_i in committers_items]  # type: List[int]
 
     if len(committers) > PUSH_COMMITTERS_LIMIT_INFO:
diff --git a/zerver/webhooks/gitlab/tests.py b/zerver/webhooks/gitlab/tests.py
index 9b16fc9b14..70678725e3 100644
--- a/zerver/webhooks/gitlab/tests.py
+++ b/zerver/webhooks/gitlab/tests.py
@@ -41,7 +41,7 @@ class GitlabHookTests(WebhookTestCase):
         # type: () -> None
         expected_subject = u"my-awesome-project / tomek"
         commit_info = u"* b ([eb6ae1e](https://gitlab.com/tomaszkolek0/my-awesome-project/commit/eb6ae1e591e0819dc5bf187c6bfe18ec065a80e9))\n"
-        expected_message = u"Tomasz Kolek [pushed](https://gitlab.com/tomaszkolek0/my-awesome-project/compare/5fcdd5551fc3085df79bece2c32b1400802ac407...eb6ae1e591e0819dc5bf187c6bfe18ec065a80e9) 7 commits to branch tomek. Commits by Ben(3), baxterthehacker(2), Tomasz Kolek(1) and others(1)\n\n{}* b ([eb6ae1e](https://gitlab.com/tomaszkolek0/my-awesome-project/commit/eb6ae1e591e0819dc5bf187c6bfe18ec065a80e9))".format(commit_info * 6)
+        expected_message = u"Tomasz Kolek [pushed](https://gitlab.com/tomaszkolek0/my-awesome-project/compare/5fcdd5551fc3085df79bece2c32b1400802ac407...eb6ae1e591e0819dc5bf187c6bfe18ec065a80e9) 7 commits to branch tomek. Commits by Ben(3), baxterthehacker(2), James(1) and others(1)\n\n{}* b ([eb6ae1e](https://gitlab.com/tomaszkolek0/my-awesome-project/commit/eb6ae1e591e0819dc5bf187c6bfe18ec065a80e9))".format(commit_info * 6)
         self.send_and_test_stream_message('push_multiple_committers_with_others', expected_subject, expected_message, HTTP_X_GITLAB_EVENT="Push Hook")
 
     def test_push_commits_more_than_limit_event_message(self):