diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f211ee98680b..797a300f9a45 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6203,7 +6203,8 @@ let
 
     propagatedBuildInputs = with self; [ pycrypto ecdsa ];
 
-    doCheck = !isPyPy;
+    # https://github.com/paramiko/paramiko/issues/449
+    doCheck = !(isPyPy || isPy33);
     checkPhase = ''
       ${python}/bin/${python.executable} test.py --no-sftp --no-big-file
     '';