diff --git a/supervisor/utils/json.py b/supervisor/utils/json.py
index d3a6b43e4..833817c6f 100644
--- a/supervisor/utils/json.py
+++ b/supervisor/utils/json.py
@@ -55,7 +55,8 @@ def write_json_file(jsonfile: Path, data: Any) -> None:
                 orjson.dumps(  # pylint: disable=no-member
                     data,
                     option=orjson.OPT_INDENT_2  # pylint: disable=no-member
-                    | orjson.OPT_NON_STR_KEYS,  # pylint: disable=no-member
+                    | orjson.OPT_NON_STR_KEYS  # pylint: disable=no-member
+                    | orjson.OPT_SORT_KEYS,  # pylint: disable=no-member
                     default=json_encoder_default,
                 ).decode("utf-8")
             )
diff --git a/tests/api/test_backups.py b/tests/api/test_backups.py
index 24aaa0bd5..c7d524b45 100644
--- a/tests/api/test_backups.py
+++ b/tests/api/test_backups.py
@@ -1035,6 +1035,9 @@ async def test_protected_backup(
     assert body["data"]["backups"][0]["location"] is None
     assert body["data"]["backups"][0]["locations"] == [None]
     assert body["data"]["backups"][0]["protected"] is True
+
+    # NOTE: Maybe it is not safe to compare size here, as random data in the
+    # backup might change the size (due to gzip).
     assert body["data"]["backups"][0]["location_attributes"] == {
         ".local": {
             "protected": True,