diff --git a/swh/model/from_disk.py b/swh/model/from_disk.py
index 798851a23514c85a44cca0dd6c816153c6ae7485..bd6308ec74482a482452aea388a65053c84a0573 100644
--- a/swh/model/from_disk.py
+++ b/swh/model/from_disk.py
@@ -567,7 +567,6 @@ class Directory(MerkleNode):
         """Builds a `model.Directory` object based on this node;
         ignoring its children."""
         if self.__model_object is None:
-
             DirectoryEntry = model.DirectoryEntry
 
             entries = []
diff --git a/swh/model/hypothesis_strategies.py b/swh/model/hypothesis_strategies.py
index 45671861f8c8a6f1215bc1fc758505d9b7722845..8beca3427c8d79bda322f4711b4ed896c97f0b2d 100644
--- a/swh/model/hypothesis_strategies.py
+++ b/swh/model/hypothesis_strategies.py
@@ -479,7 +479,7 @@ def snapshots_d(draw, *, min_size=0, max_size=100, only_objects=False):
                 }
             )
         except ValueError as e:
-            for (source, target) in e.args[1]:
+            for source, target in e.args[1]:
                 branches[source] = draw(branch_targets_d(only_objects=True))
         else:
             break
diff --git a/swh/model/model.py b/swh/model/model.py
index 0170bcaf350579c995f3f39ea36fe7ad55dd9f56..c1a6481fdb7ec3a58a9fca1d4c47991ce95bc562 100644
--- a/swh/model/model.py
+++ b/swh/model/model.py
@@ -229,7 +229,7 @@ def _immutable_dict_validator(
     key_validator = optimized_validator(expected_key_type)
     value_validator = optimized_validator(expected_value_type)
 
-    for (item_key, item_value) in value.items():
+    for item_key, item_value in value.items():
         key_validator(
             instance,
             attribute,
@@ -282,7 +282,7 @@ def optimized_validator(type_):
         ):
             if origin_value is None:
                 origin_value = value
-            for (validator, type_) in all_validators:
+            for validator, type_ in all_validators:
                 try:
                     validator(
                         instance,
diff --git a/swh/model/tests/test_hashutil.py b/swh/model/tests/test_hashutil.py
index b279f2fa9d15bf85ab2ffa8a32deefc27545332a..3153ef0428e3345d147700541fb7d100cd6d6cf7 100644
--- a/swh/model/tests/test_hashutil.py
+++ b/swh/model/tests/test_hashutil.py
@@ -36,7 +36,6 @@ def blake2_hash_cache_reset():
 @pytest.fixture
 def hash_test_data():
     class HashTestData:
-
         data = b"1984\n"
         hex_checksums = {
             "sha1": "62be35bf00ff0c624f4a621e2ea5595a049e0731",
diff --git a/swh/model/tests/test_hypothesis_strategies.py b/swh/model/tests/test_hypothesis_strategies.py
index 1531ff506f023d2b8ff854a4f26d3298bb29cce0..e43f3127c8c7bc50c626f6155085ed0cf23d7033 100644
--- a/swh/model/tests/test_hypothesis_strategies.py
+++ b/swh/model/tests/test_hypothesis_strategies.py
@@ -63,7 +63,7 @@ def assert_nested_dict(obj):
     """Tests the object is a nested dict and contains no more class
     from swh.model.model."""
     if isinstance(obj, dict):
-        for (key, value) in obj.items():
+        for key, value in obj.items():
             assert isinstance(key, (str, bytes)), key
             assert_nested_dict(value)
     elif isinstance(obj, tuple):
@@ -164,7 +164,6 @@ _max_snp_size = 100
 @given(snapshots(min_size=_min_snp_size, max_size=_max_snp_size))
 @settings(max_examples=1)
 def test_snapshots_strategy(snapshot):
-
     branches = snapshot.branches
 
     assert len(branches) >= _min_snp_size
diff --git a/swh/model/tests/test_model.py b/swh/model/tests/test_model.py
index 248410f99fcbce422207294493b9993c11a2106e..e6182ee326bf2a92381dffe8420d0a282180aadf 100644
--- a/swh/model/tests/test_model.py
+++ b/swh/model/tests/test_model.py
@@ -769,7 +769,7 @@ def test_person_comparison():
 def test_content_get_hash():
     hashes = dict(sha1=b"foo", sha1_git=b"bar", sha256=b"baz", blake2s256=b"qux")
     c = Content(length=42, status="visible", **hashes)
-    for (hash_name, hash_) in hashes.items():
+    for hash_name, hash_ in hashes.items():
         assert c.get_hash(hash_name) == hash_
 
 
@@ -1225,7 +1225,6 @@ def test_revision_check(revision):
 
 @given(strategies.revisions(raw_manifest=none()))
 def test_revision_raw_manifest(revision):
-
     raw_manifest = b"foo"
     id_ = hashlib.new("sha1", raw_manifest).digest()
 
diff --git a/swh/model/tests/test_swhids.py b/swh/model/tests/test_swhids.py
index 5c3cab22ee2cbeab65958ee230562dfab1ed3d58..12a46a010b39465bccabd48390e286d2c64b52db 100644
--- a/swh/model/tests/test_swhids.py
+++ b/swh/model/tests/test_swhids.py
@@ -230,7 +230,7 @@ VALID_SWHIDS = [
 def test_parse_unparse_swhids(string, core, qualified, extended):
     """Tests parsing and serializing valid SWHIDs with the various SWHID classes."""
     classes = [CoreSWHID, QualifiedSWHID, ExtendedSWHID]
-    for (cls, parsed_swhid) in zip(classes, [core, qualified, extended]):
+    for cls, parsed_swhid in zip(classes, [core, qualified, extended]):
         if parsed_swhid is None:
             # This class should not accept this SWHID
             with pytest.raises(ValidationError) as excinfo: