diff --git a/pkgs/development/python-modules/scales/default.nix b/pkgs/development/python-modules/scales/default.nix
index ff9ab853e5c9..c620c23119f1 100644
--- a/pkgs/development/python-modules/scales/default.nix
+++ b/pkgs/development/python-modules/scales/default.nix
@@ -2,7 +2,8 @@
   lib,
   buildPythonPackage,
   fetchPypi,
-  nose,
+  pytestCheckHook,
+  fetchpatch2,
   six,
 }:
 
@@ -16,11 +17,24 @@ buildPythonPackage rec {
     sha256 = "8b6930f7d4bf115192290b44c757af5e254e3fcfcb75ff9a51f5c96a404e2753";
   };
 
-  nativeCheckInputs = [ nose ];
-  propagatedBuildInputs = [ six ];
+  patches = [
+    # Use html module in Python 3 and cgi module in Python 2
+    # https://github.com/Cue/scales/pull/47
+    (fetchpatch2 {
+      url = "https://github.com/Cue/scales/commit/ee69d45f1a7f928f7b241702e9be06007444115e.patch?full_index=1";
+      hash = "sha256-xBlgkh1mf+3J7GtNI0zGb7Sum8UYbTpUmM12sxK/fSU=";
+    })
+  ];
 
-  # No tests included
-  doCheck = false;
+  postPatch = ''
+    for file in scales_test formats_test aggregation_test; do
+      substituteInPlace src/greplin/scales/$file.py \
+        --replace-fail "assertEquals" "assertEqual"
+    done;
+  '';
+
+  nativeCheckInputs = [ pytestCheckHook ];
+  propagatedBuildInputs = [ six ];
 
   meta = with lib; {
     description = "Stats for Python processes";