diff --git a/semantic_router/index/local.py b/semantic_router/index/local.py
index 8f674c62..76d44d82 100644
--- a/semantic_router/index/local.py
+++ b/semantic_router/index/local.py
@@ -52,7 +52,10 @@ def _remove_and_sync(self, routes_to_delete: dict) -> np.ndarray:
         for route, utterances in routes_to_delete.items():
             # TODO JB: we should be able to vectorize this?
             for utterance in utterances:
-                mask &= ~((route_utterances[:, 0] == route) & (route_utterances[:, 1] == utterance))
+                mask &= ~(
+                    (route_utterances[:, 0] == route)
+                    & (route_utterances[:, 1] == utterance)
+                )
         # apply the mask to index, routes, and utterances
         self.index = self.index[mask]
         self.routes = self.routes[mask]
diff --git a/semantic_router/index/postgres.py b/semantic_router/index/postgres.py
index 4cdd94f3..6d445f2b 100644
--- a/semantic_router/index/postgres.py
+++ b/semantic_router/index/postgres.py
@@ -140,8 +140,10 @@ def __init__(
         try:
             import psycopg2
         except ImportError:
-            raise ImportError("Please install psycopg2 to use PostgresIndex. "
-                              "You can install it with: `pip install 'semantic-router[postgres]'`")
+            raise ImportError(
+                "Please install psycopg2 to use PostgresIndex. "
+                "You can install it with: `pip install 'semantic-router[postgres]'`"
+            )
         if connection_string:
             self.connection_string = connection_string
         else:
diff --git a/tests/unit/test_sync.py b/tests/unit/test_sync.py
index 3a640f02..2f19236b 100644
--- a/tests/unit/test_sync.py
+++ b/tests/unit/test_sync.py
@@ -103,6 +103,7 @@ def layer_yaml():
   - how are things going?
     """
 
+
 # not all indexes support metadata, so we map the feature here
 INCLUDE_METADATA_MAP = {
     PineconeIndex: True,
@@ -111,9 +112,12 @@ def layer_yaml():
     QdrantIndex: False,
     PostgresIndex: False,
 }
+
+
 def include_metadata(index_cls):
     return INCLUDE_METADATA_MAP.get(index_cls, False)
 
+
 MERGE_FORCE_LOCAL_RESULT_WITH_METADATA = [
     Utterance(route="Route 1", utterance="Hello"),
     Utterance(route="Route 1", utterance="Hi"),
@@ -132,6 +136,7 @@ def include_metadata(index_cls):
     Utterance(route="Route 2", utterance="Hi"),
 ]
 
+
 @pytest.fixture
 def base_encoder():
     return DenseEncoder(name="test-encoder", score_threshold=0.5)
@@ -367,9 +372,7 @@ def test_auto_sync_merge_force_local(
             local_utterances = route_layer.index.get_utterances()
             # we sort to ensure order is the same
             # TODO JB: there is a bug here where if we include_metadata=True it fails
-            local_utterances.sort(
-                key=lambda x: x.to_str(include_metadata=False)
-            )
+            local_utterances.sort(key=lambda x: x.to_str(include_metadata=False))
             assert local_utterances == [
                 Utterance(route="Route 1", utterance="Hello"),
                 Utterance(route="Route 1", utterance="Hi"),