diff --git a/.coverage b/.coverage
index 4424185..71473d2 100644
Binary files a/.coverage and b/.coverage differ
diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 4bc0627..5028607 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -75,7 +75,7 @@ jobs:
 
       - name: Install test dependencies
         run: |
-          pip install pytest defusedxml
+          pip install pytest pytest-cov defusedxml xmltodict
           pip install -e .
 
       - name: Verify import
diff --git a/Makefile b/Makefile
index bd98e2e..f9dbfd9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: clean clean-test clean-pyc clean-build docs help
+.PHONY: clean clean-test clean-pyc clean-build docs help test-rust test-all
 .DEFAULT_GOAL := help
 
 define BROWSER_PYSCRIPT
@@ -60,11 +60,16 @@ typecheck: ## check types with ty
 	uvx ty check json2xml tests
 
 test: ## run tests quickly with the default Python
-	pytest --cov=json2xml --cov-report=xml:coverage/reports/coverage.xml --cov-report=term -xvs tests -n auto
+	pytest --cov=json2xml --cov-report=xml:coverage/reports/coverage.xml --cov-report=term -xvs tests
 
 test-simple: ## run tests without coverage
 	pytest -vv tests
 
+test-rust: ## run Rust tests
+	cd rust && cargo test --no-default-features
+
+test-all: test test-rust ## run all tests (Python and Rust)
+
 check-all: lint typecheck test ## run all checks (lint, typecheck, test)
 
 coverage: ## check code coverage quickly with the default Python
diff --git a/docs/requirements.in b/docs/requirements.in
index ab01b52..08bba10 100644
--- a/docs/requirements.in
+++ b/docs/requirements.in
@@ -8,7 +8,7 @@ sphinx-autodoc-typehints==3.6.0
 mock==5.2.0
 autodoc==0.5.0
 
-tornado==6.5.4
+tornado==6.5.5
 jinja2==3.1.6
 idna==3.11
 starlette==0.50.0
diff --git a/docs/requirements.txt b/docs/requirements.txt
index af71f7e..cd00801 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -99,7 +99,7 @@ starlette==0.50.0
     # via
     #   -r requirements.in
     #   sphinx-autobuild
-tornado==6.5.4
+tornado==6.5.5
     # via -r requirements.in
 typing-extensions==4.12.2
     # via beautifulsoup4
diff --git a/tests/test_rust_dicttoxml.py b/tests/test_rust_dicttoxml.py
index cdb469a..6efbcef 100644
--- a/tests/test_rust_dicttoxml.py
+++ b/tests/test_rust_dicttoxml.py
@@ -6,6 +6,8 @@
 """
 from __future__ import annotations
 
+from typing import Any
+
 import pytest
 
 # Check if Rust extension is available
@@ -494,8 +496,8 @@ def test_large_list(self):
 
     def test_deeply_nested_structure(self):
         """Ensure deep nesting doesn't crash."""
-        data = {"level": None}
-        current = data
+        data: dict[str, Any] = {"level": None}
+        current: dict[str, Any] = data
         for i in range(50):
             current["level"] = {"value": i}
             current = current["level"]
diff --git a/uv.lock b/uv.lock
index fd0547b..90f088e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -147,7 +147,7 @@ wheels = [
 
 [[package]]
 name = "json2xml"
-version = "6.0.3"
+version = "6.0.4"
 source = { editable = "." }
 dependencies = [
     { name = "defusedxml" },