diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d247e4d..86c8f49 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -18,14 +18,14 @@ repos:
     hooks:
       - id: codespell
   - repo: 'https://github.com/astral-sh/ruff-pre-commit'
-    rev: v0.15.8
+    rev: v0.15.9
     hooks:
       - id: ruff
         args:
           - '--fix'
       - id: ruff-format
   - repo: 'https://github.com/pre-commit/mirrors-mypy'
-    rev: v1.19.1
+    rev: v1.20.0
     hooks:
       - id: mypy
         additional_dependencies:
diff --git a/tests/plugins/distributed_test.py b/tests/plugins/distributed_test.py
index 6cd80dd..39df99e 100644
--- a/tests/plugins/distributed_test.py
+++ b/tests/plugins/distributed_test.py
@@ -174,6 +174,7 @@ def _factory() -> str:
         # The target is already set by default
         del x.__proxy_target__
         assert x == test_obj
+        assert isinstance(x, Proxy)
         assert not store.exists(get_key(x))
 
 
@@ -238,6 +239,7 @@ def _foo(a: int, b: str, *, c: int, d: str) -> str:
         # The target is already set by default
         del result.__proxy_target__
         assert result == '1bbbbbbbbbb2dddddddddd'
+        assert isinstance(result, Proxy)
         assert not store.exists(get_key(result))