diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index d63547f5a..a8c5c332b 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -4,6 +4,10 @@ name: Test code quality
 
 on:
   push:
+    branches:
+      - dev
+      - main
+  pull_request:
     branches:
       - "*"
 
diff --git a/src/aleph/chains/avalanche.py b/src/aleph/chains/avalanche.py
index 12e2ca217..c85e1774c 100644
--- a/src/aleph/chains/avalanche.py
+++ b/src/aleph/chains/avalanche.py
@@ -13,7 +13,7 @@
 
 LOGGER = logging.getLogger("chains.avalanche")
 CHAIN_NAME = "AVAX"
-MESSAGE_TEMPLATE = b"\x1AAvalanche Signed Message:\n%b"
+MESSAGE_TEMPLATE = b"\x1aAvalanche Signed Message:\n%b"
 
 
 async def pack_message(message):
diff --git a/src/aleph/chains/nuls_aleph_sdk.py b/src/aleph/chains/nuls_aleph_sdk.py
index 7c17257c4..4082b2457 100644
--- a/src/aleph/chains/nuls_aleph_sdk.py
+++ b/src/aleph/chains/nuls_aleph_sdk.py
@@ -12,7 +12,7 @@
 
 LOGGER = logging.getLogger(__name__)
 
-PLACE_HOLDER = b"\xFF\xFF\xFF\xFF"
+PLACE_HOLDER = b"\xff\xff\xff\xff"
 B58_DIGITS = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
 MESSAGE_TEMPLATE = "\x18NULS Signed Message:\n{}"
 
diff --git a/src/aleph/db/accessors/peers.py b/src/aleph/db/accessors/peers.py
index f02b3f612..8599b51d6 100644
--- a/src/aleph/db/accessors/peers.py
+++ b/src/aleph/db/accessors/peers.py
@@ -11,7 +11,9 @@
 
 
 def get_all_addresses_by_peer_type(
-    session: DbSession, peer_type: PeerType, last_seen: Optional[dt.datetime] = None,
+    session: DbSession,
+    peer_type: PeerType,
+    last_seen: Optional[dt.datetime] = None,
 ) -> Sequence[str]:
     """
     Fetches all peer addresses filtered by peer type and optionally by the last_seen
diff --git a/src/aleph/jobs/reconnect_ipfs.py b/src/aleph/jobs/reconnect_ipfs.py
index 5c4a80d18..57f68d9dc 100644
--- a/src/aleph/jobs/reconnect_ipfs.py
+++ b/src/aleph/jobs/reconnect_ipfs.py
@@ -18,7 +18,7 @@
 
 
 async def reconnect_ipfs_job(
-        config: Config, session_factory: DbSessionFactory, ipfs_service: IpfsService
+    config: Config, session_factory: DbSessionFactory, ipfs_service: IpfsService
 ):
     from aleph.services.utils import get_IP
 
diff --git a/src/aleph/services/p2p/http.py b/src/aleph/services/p2p/http.py
index 53b92d537..36ed55315 100644
--- a/src/aleph/services/p2p/http.py
+++ b/src/aleph/services/p2p/http.py
@@ -1,4 +1,4 @@
-""" While our own streamer libp2p protocol is still unstable, use direct
+"""While our own streamer libp2p protocol is still unstable, use direct
 HTTP connection to standard rest API.
 """
 
diff --git a/src/aleph/services/p2p/jobs.py b/src/aleph/services/p2p/jobs.py
index 68cb06349..68a06e6cf 100644
--- a/src/aleph/services/p2p/jobs.py
+++ b/src/aleph/services/p2p/jobs.py
@@ -10,9 +10,10 @@
 from aleph.db.accessors.peers import get_all_addresses_by_peer_type
 from aleph.db.models import PeerType
 from aleph.types.db_session import DbSessionFactory
+
+from ..cache.node_cache import NodeCache
 from .http import api_get_request
 from .peers import connect_peer
-from ..cache.node_cache import NodeCache
 
 
 @dataclass
diff --git a/src/aleph/services/pricing_utils.py b/src/aleph/services/pricing_utils.py
index 11c1975cd..e0f9a0779 100644
--- a/src/aleph/services/pricing_utils.py
+++ b/src/aleph/services/pricing_utils.py
@@ -20,7 +20,7 @@
 
 
 def build_pricing_model_from_aggregate(
-    aggregate_content: Dict[Union[ProductPriceType, str], dict]
+    aggregate_content: Dict[Union[ProductPriceType, str], dict],
 ) -> Dict[ProductPriceType, ProductPricing]:
     """
     Build a complete pricing model from an aggregate content dictionary.
diff --git a/src/aleph/storage.py b/src/aleph/storage.py
index d9a4d19f2..89e3c8913 100644
--- a/src/aleph/storage.py
+++ b/src/aleph/storage.py
@@ -1,4 +1,4 @@
-""" Storage module for Aleph.
+"""Storage module for Aleph.
 Basically manages the IPFS storage.
 """
 
diff --git a/src/aleph/toolkit/timestamp.py b/src/aleph/toolkit/timestamp.py
index 8fae474c5..7facb1dfc 100644
--- a/src/aleph/toolkit/timestamp.py
+++ b/src/aleph/toolkit/timestamp.py
@@ -14,7 +14,7 @@ def timestamp_to_datetime(timestamp: float) -> dt.datetime:
 
 
 def coerce_to_datetime(
-    datetime_or_timestamp: Optional[Union[float, dt.datetime]]
+    datetime_or_timestamp: Optional[Union[float, dt.datetime]],
 ) -> Optional[dt.datetime]:
     # None for datetimes or 0 for timestamps results in returning None
     if datetime_or_timestamp is None or not datetime_or_timestamp:
diff --git a/tests/api/conftest.py b/tests/api/conftest.py
index 79e95d30d..268e12aea 100644
--- a/tests/api/conftest.py
+++ b/tests/api/conftest.py
@@ -182,7 +182,7 @@ def post_with_refs_and_tags() -> Tuple[MessageDb, PostDb, MessageStatusDb]:
 
 @pytest.fixture
 def amended_post_with_refs_and_tags(
-    post_with_refs_and_tags: Tuple[MessageDb, PostDb, MessageStatusDb]
+    post_with_refs_and_tags: Tuple[MessageDb, PostDb, MessageStatusDb],
 ):
     original_message, original_post, _ = post_with_refs_and_tags
 
diff --git a/tests/db/test_peers.py b/tests/db/test_peers.py
index 2d6b31f55..6804b2775 100644
--- a/tests/db/test_peers.py
+++ b/tests/db/test_peers.py
@@ -63,13 +63,14 @@ async def test_get_all_addresses_by_peer_type(session_factory: DbSessionFactory)
             session=session, peer_type=PeerType.P2P, last_seen=last_seen
         )
         old_p2p_entries = get_all_addresses_by_peer_type(
-            session=session, peer_type=PeerType.P2P, last_seen=last_seen + dt.timedelta(days=1)
+            session=session,
+            peer_type=PeerType.P2P,
+            last_seen=last_seen + dt.timedelta(days=1),
         )
         assert recent_p2p_entries == [p2p_entry.address]
         assert old_p2p_entries == []
 
 
-
 @pytest.mark.asyncio
 @pytest.mark.parametrize("peer_type", (PeerType.HTTP, PeerType.P2P, PeerType.IPFS))
 async def test_get_all_addresses_by_peer_type_no_match(