diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 4bca47fe..3f1de932 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -22,6 +22,6 @@
     -   id: reorder-python-imports
         language_version: python2.7
 -   repo: https://github.com/asottile/add-trailing-comma
-    sha: v0.4.0
+    sha: v0.5.1
     hooks:
     -   id: add-trailing-comma
diff --git a/tests/clientlib_test.py b/tests/clientlib_test.py
index 1fe1d80b..6c04648c 100644
--- a/tests/clientlib_test.py
+++ b/tests/clientlib_test.py
@@ -146,7 +146,7 @@ def test_config_with_local_hooks_definition_fails(config_obj):
                 'language': 'script',
                 'files': '',
                 'args': ['hello', 'world'],
-            }]
+            }],
         }],
     ),
 )
@@ -185,7 +185,7 @@ def test_validate_manifest_main(args, expected_output):
                 'name': 'b',
                 'entry': 'c',
                 'language': 'python',
-                'files': r'\.py$'
+                'files': r'\.py$',
             }],
             True,
         ),