diff --git a/pkgs/development/python-modules/certomancer/default.nix b/pkgs/development/python-modules/certomancer/default.nix
index 767071a75ef2..324bb21f4d51 100644
--- a/pkgs/development/python-modules/certomancer/default.nix
+++ b/pkgs/development/python-modules/certomancer/default.nix
@@ -58,6 +58,11 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  disabledTests = [
+    # pyhanko_certvalidator.errors.DisallowedAlgorithmError
+    "test_validate"
+  ];
+
   pythonImportsCheck = [ "certomancer" ];
 
   meta = with lib; {