diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index cad5b6146cd..5c8ac62770b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3136,6 +3136,15 @@ in {
     };
   };
 
+  # Needed for celery
+  pytest_32 = self.pytest_34.overrideAttrs( oldAttrs: rec {
+    version = "3.2.5";
+    src = oldAttrs.src.override {
+      inherit version;
+      sha256 = "6d5bd4f7113b444c55a3bbb5c738a3dd80d43563d063fc42dcb0aaefbdd78b81";
+    };
+  });
+
   pytest-httpbin = callPackage ../development/python-modules/pytest-httpbin { };
 
   pytest-asyncio = callPackage ../development/python-modules/pytest-asyncio { };