diff --git a/pkgs/development/python-modules/simplesat/default.nix b/pkgs/development/python-modules/simplesat/default.nix
index d325847f9ab0..80829fde3552 100644
--- a/pkgs/development/python-modules/simplesat/default.nix
+++ b/pkgs/development/python-modules/simplesat/default.nix
@@ -47,11 +47,6 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "simplesat" ];
 
-  preCheck = ''
-    substituteInPlace simplesat/tests/test_pool.py \
-      --replace-fail "assertRaisesRegexp" "assertRaisesRegex"
-  '';
-
   enabledTestPaths = [ "simplesat/tests" ];
 
   meta = with lib; {