diff --git a/pkgs/development/python-modules/pystiebeleltron/default.nix b/pkgs/development/python-modules/pystiebeleltron/default.nix
index 6583c95f29e9..1e9ba577a4fb 100644
--- a/pkgs/development/python-modules/pystiebeleltron/default.nix
+++ b/pkgs/development/python-modules/pystiebeleltron/default.nix
@@ -31,6 +31,11 @@ buildPythonPackage rec {
     pytest-mock
   ];
 
+  disabledTestPaths = [
+    # mock server is not compatible with pymodbus 3.13
+    "test/test_pystiebeleltron.py"
+  ];
+
   pythonImportsCheck = [ "pystiebeleltron" ];
 
   meta = {