diff --git a/podman/client.py b/podman/client.py
index 6b95822e..546a7fd9 100644
--- a/podman/client.py
+++ b/podman/client.py
@@ -144,11 +144,7 @@ def from_env(
                 "max_pool_size": max_pool_size,
             }
 
-            host = (
-                environment.get("CONTAINER_HOST")
-                or environment.get("DOCKER_HOST")
-                or None
-            )
+            host = environment.get("CONTAINER_HOST") or environment.get("DOCKER_HOST") or None
             if host is not None:
                 kwargs["base_url"] = host
 
diff --git a/podman/errors/exceptions.py b/podman/errors/exceptions.py
index c403d95d..aaf2fb43 100644
--- a/podman/errors/exceptions.py
+++ b/podman/errors/exceptions.py
@@ -144,6 +144,7 @@ def __init__(
 class InvalidArgument(PodmanError):
     """Parameter to method/function was not valid."""
 
+
 class PodmanConnectionError(PodmanError):
     """Exception raised when connection to Podman service fails using environment configuration."""
 
diff --git a/podman/tests/integration/test_system.py b/podman/tests/integration/test_system.py
index 08ffd5a8..1cf43af6 100644
--- a/podman/tests/integration/test_system.py
+++ b/podman/tests/integration/test_system.py
@@ -64,7 +64,7 @@ def test_login(self):
     def test_from_env(self):
         """integration: from_env() no error"""
         PodmanClient.from_env()
-    
+
     def test_from_env_exceptions(self):
         """integration: from_env() returns exceptions"""
         with self.assertRaises(PodmanConnectionError):