python313Packages.ruffus: fix tests (#404499)

pkgs/development/python-modules/ruffus/default.nix

@@ -4,6 +4,7 @@
   fetchFromGitHub,
   hostname,
   pytest,
+  pythonAtLeast,
   lib,
   stdenv,
 }:
@@ -29,15 +30,21 @@ buildPythonPackage rec {
 
   # tests very flaky & hang often on darwin
   doCheck = !stdenv.hostPlatform.isDarwin;
-  # test files do indeed need to be executed separately
-  checkPhase = ''
-    pushd ruffus/test
-    rm test_with_logger.py  # spawns 500 processes
-    for f in test_*.py ; do
-      HOME=$TMPDIR pytest -v --disable-warnings $f
-    done
-    popd
-  '';
+  checkPhase =
+    # https://docs.python.org/3/whatsnew/3.13.html#re
+    lib.optionalString (pythonAtLeast "3.13") ''
+      substituteInPlace ruffus/test/test_ruffus_utility.py \
+        --replace-fail re.error re.PatternError
+    ''
+    # test files do indeed need to be executed separately
+    + ''
+      pushd ruffus/test
+      rm test_with_logger.py  # spawns 500 processes
+      for f in test_*.py ; do
+        HOME=$TMPDIR pytest -v --disable-warnings $f
+      done
+      popd
+    '';
   pythonImportsCheck = [ "ruffus" ];
 
   meta = with lib; {