diff --git a/swift/common/memcached.py b/swift/common/memcached.py
index d367b80c..f3d0eae5 100644
--- a/swift/common/memcached.py
+++ b/swift/common/memcached.py
@@ -443,7 +443,7 @@ class MemcacheRing(object):
                 with Timeout(self._io_timeout):
                     sock.sendall(msg)
                     # Wait for the set to complete
-                    for _ in range(len(mapping)):
+                    for line in range(len(mapping)):
                         fp.readline()
                     self._return_conn(server, fp, sock)
                     return
diff --git a/tox.ini b/tox.ini
index 7af92875..e16056cc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -55,7 +55,6 @@ commands = bandit -c bandit.yaml -r swift bin -n 5 -p gate
 
 [flake8]
 # it's not a bug that we aren't using all of hacking, ignore:
-# F402: import '_' from line 51 shadowed by loop variable
 # F812: list comprehension redefines ...
 # H101: Use TODO(NAME)
 # H202: assertRaises Exception too broad
@@ -69,6 +68,6 @@ commands = bandit -c bandit.yaml -r swift bin -n 5 -p gate
 # H405: multi line docstring summary not separated with an empty line
 # H501: Do not use self.__dict__ for string formatting
 # H703: Multiple positional placeholders
-ignore = F402,F812,H101,H202,H233,H234,H301,H306,H401,H403,H404,H405,H501,H703
+ignore = F812,H101,H202,H233,H234,H301,H306,H401,H403,H404,H405,H501,H703
 exclude = .venv,.tox,dist,doc,*egg
 show-source = True