diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9396f323e4..2bc361bc48 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,12 +14,12 @@ repos:
         types: [python]
         files: (litellm/|litellm_proxy_extras/|enterprise/).*\.py
         exclude: ^litellm/__init__.py$
-    # -   id: black
-    #     name: black
-    #     entry: poetry run black
-    #     language: system
-    #     types: [python]
-    #     files: (litellm/|litellm_proxy_extras/|enterprise/).*\.py
+    -   id: black
+        name: black
+        entry: poetry run black
+        language: system
+        types: [python]
+        files: (litellm/|litellm_proxy_extras/).*\.py
 -   repo: https://github.com/pycqa/flake8
     rev: 7.0.0  # The version of flake8 to use
     hooks:
diff --git a/litellm/llms/anthropic/skills/transformation.py b/litellm/llms/anthropic/skills/transformation.py
index f582aefd81..a992d84d45 100644
--- a/litellm/llms/anthropic/skills/transformation.py
+++ b/litellm/llms/anthropic/skills/transformation.py
@@ -42,7 +42,9 @@ class AnthropicSkillsConfig(BaseSkillsAPIConfig):
 
         auth_header = AnthropicModelInfo.get_auth_header(api_key)
         if auth_header is None:
-            raise ValueError("ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN is required for Skills API")
+            raise ValueError(
+                "ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN is required for Skills API"
+            )
 
         headers.update(auth_header)
         headers["anthropic-version"] = "2023-06-01"
diff --git a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
index 96a7b5a27a..534022cc13 100644
--- a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
@@ -586,7 +586,11 @@ async def anthropic_proxy_route(
     """
     [Docs](https://docs.litellm.ai/docs/pass_through/anthropic_completion)
     """
-    base_target_url = os.getenv("ANTHROPIC_API_BASE") or os.getenv("ANTHROPIC_BASE_URL") or "https://api.anthropic.com"
+    base_target_url = (
+        os.getenv("ANTHROPIC_API_BASE")
+        or os.getenv("ANTHROPIC_BASE_URL")
+        or "https://api.anthropic.com"
+    )
     encoded_endpoint = httpx.URL(endpoint).path
 
     # Ensure endpoint starts with '/' for proper URL construction
diff --git a/litellm/utils.py b/litellm/utils.py
index 77625809bf..c8272586da 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -6160,7 +6160,10 @@ def validate_environment(  # noqa: PLR0915
                     ["AZURE_API_BASE", "AZURE_API_VERSION", "AZURE_API_KEY"]
                 )
         elif custom_llm_provider == "anthropic":
-            if "ANTHROPIC_API_KEY" in os.environ or "ANTHROPIC_AUTH_TOKEN" in os.environ:
+            if (
+                "ANTHROPIC_API_KEY" in os.environ
+                or "ANTHROPIC_AUTH_TOKEN" in os.environ
+            ):
                 keys_in_environment = True
             else:
                 missing_keys.append("ANTHROPIC_API_KEY")
@@ -6399,7 +6402,10 @@ def validate_environment(  # noqa: PLR0915
                 missing_keys.append("OPENAI_API_KEY")
         ## anthropic
         elif model in litellm.anthropic_models:
-            if "ANTHROPIC_API_KEY" in os.environ or "ANTHROPIC_AUTH_TOKEN" in os.environ:
+            if (
+                "ANTHROPIC_API_KEY" in os.environ
+                or "ANTHROPIC_AUTH_TOKEN" in os.environ
+            ):
                 keys_in_environment = True
             else:
                 missing_keys.append("ANTHROPIC_API_KEY")