Catch Py312+ warning when using ratarmount

yt/tests/test_load_archive.py

@@ -70,9 +70,22 @@ def test_load_archive(
                     tar.addfile(member, fileobj=content)
 
     # Now try to open the .tar.* files
-    warn_msg = "The 'load_archive' function is still experimental and may be unstable."
-    with pytest.warns(UserWarning, match=warn_msg):
-        ds = load_archive(tar_path, exact_loc, mount_timeout=10)
+    yt_warn_msg = (
+        "The 'load_archive' function is still experimental and may be unstable."
+    )
+
+    with pytest.warns(UserWarning, match=yt_warn_msg):
+        if sys.version_info >= (3, 12):
+            # On Python 3.12+, there is a deprecation warning when calling os.fork()
+            # in a multi-threaded process
+            py312_warning = (
+                r"This process \(pid=\d+\) is multi-threaded, use of fork\(\) "
+                r"may lead to deadlocks in the child\."
+            )
+            with pytest.warns(DeprecationWarning, match=py312_warning):
+                ds = load_archive(tar_path, exact_loc, mount_timeout=10)
+        else:
+            ds = load_archive(tar_path, exact_loc, mount_timeout=10)
     assert type(ds).__name__ == class_
 
     # Make sure the index is readable