diff --git a/medusa/storage/s3_base_storage.py b/medusa/storage/s3_base_storage.py
index 5da0324b..818b37bd 100644
--- a/medusa/storage/s3_base_storage.py
+++ b/medusa/storage/s3_base_storage.py
@@ -217,7 +217,6 @@ def _consolidate_credentials(config) -> CensoredCredentials:
             session.set_config_variable('credentials_file', config.key_file)
 
             boto_credentials = session.get_credentials()
-
             return CensoredCredentials(
                 access_key_id=boto_credentials.access_key,
                 secret_access_key=boto_credentials.secret_key,
diff --git a/tests/storage/s3_storage_test.py b/tests/storage/s3_storage_test.py
index 363919eb..a80d0945 100644
--- a/tests/storage/s3_storage_test.py
+++ b/tests/storage/s3_storage_test.py
@@ -80,19 +80,19 @@ def test_credentials_from_env_without_profile(self):
             os.environ["AWS_SECRET_ACCESS_KEY"] = "secret-from-env"
 
             config = AttributeDict({
-                    "api_profile": None,
-                    "region": "region-from-config",
-                    "storage_provider": "s3_us_west_oregon",
-                    "key_file": empty_file.name,
-                    "concurrent_transfers": "1",
+                'api_profile': None,
+                'region': 'region-from-config',
+                'storage_provider': 's3_us_west_oregon',
+                'key_file': empty_file.name,
+                'concurrent_transfers': '1',
                 })
 
             credentials = S3BaseStorage._consolidate_credentials(config)
-            self.assertEqual("key-from-env", credentials.access_key_id)
-            self.assertEqual("region-from-config", credentials.region)
+            self.assertEqual('key-from-env', credentials.access_key_id)
+            self.assertEqual('region-from-config', credentials.region)
 
-            del os.environ["AWS_ACCESS_KEY_ID"]
-            del os.environ["AWS_SECRET_ACCESS_KEY"]
+            del os.environ['AWS_ACCESS_KEY_ID']
+            del os.environ['AWS_SECRET_ACCESS_KEY']
 
     def test_credentials_from_file(self):
         credentials_file_content = """