1 files changed, 10 insertions, 9 deletions
diff --git a/tests/stub_sftp.py b/tests/stub_sftp.py
index 100076d6..1528a0b8 100644
--- a/tests/stub_sftp.py
+++ b/tests/stub_sftp.py
@@ -21,18 +21,17 @@ A stub SFTP server for loopback SFTP testing.
 """
 
 import os
-import sys
 
 from paramiko import (
-    ServerInterface,
-    SFTPServerInterface,
-    SFTPServer,
+    AUTH_SUCCESSFUL,
+    OPEN_SUCCEEDED,
     SFTPAttributes,
     SFTPHandle,
-    SFTP_OK,
+    SFTPServer,
+    SFTPServerInterface,
     SFTP_FAILURE,
-    AUTH_SUCCESSFUL,
-    OPEN_SUCCEEDED,
+    SFTP_OK,
+    ServerInterface,
 )
 from paramiko.common import o666
 
@@ -65,7 +64,8 @@ class StubSFTPHandle(SFTPHandle):
 
 class StubSFTPServer(SFTPServerInterface):
     # assume current folder is a fine root
-    # (the tests always create and eventually delete a subfolder, so there shouldn't be any mess)
+    # (the tests always create and eventually delete a subfolder, so there
+    # shouldn't be any mess)
     ROOT = os.getcwd()
 
     def _realpath(self, path):
@@ -206,7 +206,8 @@ class StubSFTPServer(SFTPServerInterface):
             # compute relative to path
             abspath = os.path.join(os.path.dirname(path), target_path)
             if abspath[: len(self.ROOT)] != self.ROOT:
-                # this symlink isn't going to work anyway -- just break it immediately
+                # this symlink isn't going to work anyway -- just break it
+                # immediately
                 target_path = "<error>"
         try:
             os.symlink(target_path, path)