1 files changed, 13 insertions, 1 deletions
diff --git a/tests/stub_sftp.py b/tests/stub_sftp.py
index 334af561..0d673091 100644
--- a/tests/stub_sftp.py
+++ b/tests/stub_sftp.py
@@ -24,7 +24,7 @@ import os
 import sys
 from paramiko import (
     ServerInterface, SFTPServerInterface, SFTPServer, SFTPAttributes,
-    SFTPHandle, SFTP_OK, AUTH_SUCCESSFUL, OPEN_SUCCEEDED,
+    SFTPHandle, SFTP_OK, SFTP_FAILURE, AUTH_SUCCESSFUL, OPEN_SUCCEEDED,
 )
 from paramiko.common import o666
 
@@ -141,12 +141,24 @@ class StubSFTPServer (SFTPServerInterface):
     def rename(self, oldpath, newpath):
         oldpath = self._realpath(oldpath)
         newpath = self._realpath(newpath)
+        if os.path.exists(newpath):
+            return SFTP_FAILURE
         try:
             os.rename(oldpath, newpath)
         except OSError as e:
             return SFTPServer.convert_errno(e.errno)
         return SFTP_OK
 
+    def posix_rename(self, oldpath, newpath):
+        oldpath = self._realpath(oldpath)
+        newpath = self._realpath(newpath)
+        try:
+            os.rename(oldpath, newpath)
+        except OSError as e:
+            return SFTPServer.convert_errno(e.errno)
+        return SFTP_OK
+
+
     def mkdir(self, path, attr):
         path = self._realpath(path)
         try: