diff --git a/pre_commit/commands/hook_impl.py b/pre_commit/commands/hook_impl.py
index ba6491b4..bd936133 100644
--- a/pre_commit/commands/hook_impl.py
+++ b/pre_commit/commands/hook_impl.py
@@ -115,7 +115,7 @@ def _rev_exists(rev: str) -> bool:
 
 def _is_ancestor(ancestor: str, rev: str):
     return not subprocess.call(
-        ('git', 'merge-base', '--is-ancestor', ancestor, rev)
+        ('git', 'merge-base', '--is-ancestor', ancestor, rev),
     )
 
 
@@ -133,7 +133,7 @@ def _pre_push_ns(
         if local_sha == Z40:
             continue
         elif remote_sha != Z40 and _rev_exists(remote_sha) \
-            and _is_ancestor(remote_sha, local_sha):
+                and _is_ancestor(remote_sha, local_sha):
             return _ns(
                 'pre-push', color,
                 from_ref=remote_sha, to_ref=local_sha,