Fix pickle hash test for Python 3.14 (#725)

Author: tobiasraabe

CHANGELOG.md

@@ -5,6 +5,11 @@ chronological order. Releases follow [semantic versioning](https://semver.org/)
 releases are available on [PyPI](https://pypi.org/project/pytask) and
 [Anaconda.org](https://anaconda.org/conda-forge/pytask).
 
+## Unreleased
+
+- {pull}`725` fixes the pickle node hash test by accounting for Python 3.14's
+  default pickle protocol.
+
 ## 0.5.7 - 2025-11-22
 
 - {pull}`721` clarifies the documentation on repeated tasks in notebooks.

tests/test_nodes.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import pickle
+import sys
 from pathlib import Path
 
 import cloudpickle
@@ -94,7 +95,15 @@ def test_hash_of_path_node(tmp_path, value, exists, expected):
     ("value", "exists", "expected"),
     [
         ("0", False, None),
-        ("0", True, "2e81f502b7a28f824c4f1451c946b952eebe65a8521925ef8f6135ef6f422e8e"),
+        # Python 3.14+ uses pickle protocol 5 by default, which produces different
+        # hashes
+        (
+            "0",
+            True,
+            "1973e23848344dc43a988a9b478663803cfffe1243480253f9a3cf004b14aa7c"
+            if sys.version_info >= (3, 14)
+            else "2e81f502b7a28f824c4f1451c946b952eebe65a8521925ef8f6135ef6f422e8e",
+        ),
     ],
 )
 def test_hash_of_pickle_node(tmp_path, value, exists, expected):