diff --git a/pkgs/development/python-modules/pytest-asyncio/default.nix b/pkgs/development/python-modules/pytest-asyncio/default.nix
index a8e3f7e02685..966a207e50cf 100644
--- a/pkgs/development/python-modules/pytest-asyncio/default.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/default.nix
@@ -1,9 +1,11 @@
-{ stdenv, buildPythonPackage, fetchurl, pytest }:
+{ stdenv, buildPythonPackage, fetchurl, pytest, isPy3k }:
 buildPythonPackage rec {
   name = "${pname}-${version}";
   pname = "pytest-asyncio";
   version = "0.5.0";
 
+  disabled = !isPy3k;
+
   src = fetchurl {
     url = "mirror://pypi/p/${pname}/${name}.tar.gz";
     sha256 = "03sxq8fglr4lw4y6wqlbli9ypr65fxzx6hlpn5wpccx8v5472iff";