diff --git a/pkgs/development/python-modules/docformatter/default.nix b/pkgs/development/python-modules/docformatter/default.nix
index 7e87e8aa5dc9..6031ee190f68 100644
--- a/pkgs/development/python-modules/docformatter/default.nix
+++ b/pkgs/development/python-modules/docformatter/default.nix
@@ -48,10 +48,12 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  # Disable failing tests until https://github.com/PyCQA/docformatter/issues/274 is fixed upstream
   disabledTests = [
+    # Disable failing tests until https://github.com/PyCQA/docformatter/issues/274 is fixed upstream
     "test_do_format_code.py"
     "test_docformatter.py"
+    # some different issue
+    "test_detect_encoding_with_undetectable_encoding"
   ];
 
   pythonImportsCheck = [ "docformatter" ];