diff --git a/pkgs/development/python-modules/xmlsec/default.nix b/pkgs/development/python-modules/xmlsec/default.nix
index 0a9a0af0e543..76ce32e5e8f3 100644
--- a/pkgs/development/python-modules/xmlsec/default.nix
+++ b/pkgs/development/python-modules/xmlsec/default.nix
@@ -16,6 +16,7 @@
 buildPythonPackage rec {
   pname = "xmlsec";
   version = "1.3.12";
+  format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
@@ -35,7 +36,14 @@ buildPythonPackage rec {
 
   # Full git clone required for test_doc_examples
   checkInputs = [ pytestCheckHook hypothesis ];
-  disabledTestPaths = [ "tests/test_doc_examples.py" ];
+
+  disabledTestPaths = [
+    "tests/test_doc_examples.py"
+    # test_reinitialize_module segfaults python
+    # https://github.com/mehcode/python-xmlsec/issues/203
+    "tests/test_xmlsec.py"
+  ];
+
 
   pythonImportsCheck = [ "xmlsec" ];