diff --git a/pkgs/development/python-modules/django-celery-results/default.nix b/pkgs/development/python-modules/django-celery-results/default.nix
index 1cb4b0f3b81f..2b2fe06de614 100644
--- a/pkgs/development/python-modules/django-celery-results/default.nix
+++ b/pkgs/development/python-modules/django-celery-results/default.nix
@@ -18,6 +18,11 @@ buildPythonPackage rec {
     hash = "sha256-dapRlw21aRy/JCxqD/UMjN9BniZc0Om3cjNdBkNsS5k=";
   };
 
+  postPatch = ''
+    # Drop malformatted tests_require specification
+    sed -i '/tests_require=/d' setup.py
+  '';
+
   propagatedBuildInputs = [
     celery
     django