diff --git a/webdav3/client.py b/webdav3/client.py
index ca29f80..c88a172 100644
--- a/webdav3/client.py
+++ b/webdav3/client.py
@@ -214,7 +214,7 @@ class Client(object):
         response = self.session.request(
             method=self.requests[action],
             url=self.get_url(path),
-            auth=(self.webdav.login, self.webdav.password) if not self.webdav.token else None,
+            auth=(self.webdav.login, self.webdav.password) if (not self.webdav.token and not self.session.auth) else None,
             headers=self.get_headers(action, headers_ext),
             timeout=self.timeout,
             data=data,