diff --git a/pkgs/development/python-modules/ploomber-core/default.nix b/pkgs/development/python-modules/ploomber-core/default.nix
index 52907f3127d1..3d6ac8dfbfd9 100644
--- a/pkgs/development/python-modules/ploomber-core/default.nix
+++ b/pkgs/development/python-modules/ploomber-core/default.nix
@@ -6,6 +6,7 @@
   pyyaml,
   posthog,
   pytestCheckHook,
+  pythonAtLeast,
   typing-extensions,
 }:
 
@@ -36,6 +37,11 @@ buildPythonPackage rec {
     "exceptions" # requires stderr capture
   ];
 
+  disabledTestPaths = lib.optionals (pythonAtLeast "3.14") [
+    # Depends on pre-3.14 attribute access
+    "tests/test_config.py"
+  ];
+
   pythonImportsCheck = [ "ploomber_core" ];
 
   meta = {