diff --git a/src/urllib3/util/response.py b/src/urllib3/util/response.py
index 1ff28cac90..d54aa46ccf 100644
--- a/src/urllib3/util/response.py
+++ b/src/urllib3/util/response.py
@@ -4,6 +4,7 @@
 from ..exceptions import HeaderParsingError
 from ..contrib import _appengine_environ
 
+
 def is_fp_closed(obj):
     """
     Checks whether a given file-like object is closed.