diff --git a/_version.py b/_version.py
index 34c1db3..8412cb1 100644
--- a/_version.py
+++ b/_version.py
@@ -1 +1 @@
-__version__ = '1.0.2'
\ No newline at end of file
+__version__ = '1.0.5'
\ No newline at end of file
diff --git a/src/pyscripttestutils/PyScriptTestRunner.py b/src/pyscripttestutils/PyScriptTestRunner.py
index 45bea43..23d6ec3 100644
--- a/src/pyscripttestutils/PyScriptTestRunner.py
+++ b/src/pyscripttestutils/PyScriptTestRunner.py
@@ -254,7 +254,7 @@ def _call_typescript_function(
             request = {"method": function_name, "args": args, "mocks": mocks}
 
             result = subprocess.run(
-                ["node", str(self.ts_bridge_path), json.dumps(request)],
+                ["node", str(self.ts_bridge_path), json.dumps(request, ensure_ascii=False).encode('utf-8')],
                 capture_output=True,
                 text=True,
                 cwd=str(self.package_root),
@@ -306,7 +306,7 @@ def compare_results(self, py_result: Any, ts_result: Any) -> bool:
         if py_result != ts_result:
             return False
 
-        if type(py_result) != type(ts_result):
+        if type(py_result) is not type(ts_result):
             return False
 
         if isinstance(py_result, dict) and isinstance(ts_result, dict):
@@ -335,7 +335,7 @@ def _compare_dicts(self, py_result: Dict[str, Any], ts_result: Dict[str, Any]) -
             py_value = py_result[key]
             ts_value = ts_result[key]
 
-            if type(py_value) != type(ts_value):
+            if type(py_value) is not type(ts_value):
                 return False
 
             if isinstance(py_value, dict) and isinstance(ts_value, dict) and not self.compare_results(py_value, ts_value):
@@ -380,7 +380,7 @@ def assert_strict_parity(self, py_result: Any, ts_result: Any, context: str = ""
         if py_result != ts_result or not self.compare_results(py_result, ts_result):
             error_details.append(f"Value mismatch: Python={py_result}, TypeScript={ts_result}")
 
-        if type(py_result) != type(ts_result):
+        if type(py_result) is not type(ts_result):
             error_details.append(
                 f"Type mismatch: Python={type(py_result).__name__}, "
                 f"TypeScript={type(ts_result).__name__}"
@@ -400,7 +400,7 @@ def assert_strict_parity(self, py_result: Any, ts_result: Any, context: str = ""
                     error_details.append(f"Fields missing in Python: {missing_in_py}")
 
             for key in py_keys & ts_keys:
-                if type(py_result[key]) != type(ts_result[key]):
+                if type(py_result[key]) is not type(ts_result[key]):
                     error_details.append(f"Field '{key}' type mismatch: Python={type(py_result[key]).__name__}, TypeScript={type(ts_result[key]).__name__}")
 
         if len(error_details) == 0:
diff --git a/tests/utils/test_py_script_test_runner_coverage.py b/tests/utils/test_py_script_test_runner_coverage.py
index ce960fb..d778e56 100644
--- a/tests/utils/test_py_script_test_runner_coverage.py
+++ b/tests/utils/test_py_script_test_runner_coverage.py
@@ -272,7 +272,7 @@ def test_call_typescript_stderr_triggers_debug_banner(self, capsys):
         mock_proc = Mock(
             returncode=0,
             stderr="console.log debug info",
-            stdout=json.dumps({"success": True, "result": 50}),
+            stdout=json.dumps({"success": True, "result": 50}, ensure_ascii=False).encode('utf-8'),
         )
         with patch(SUBPROCESS_PATH, return_value=mock_proc):
             result = runner._call_typescript_function("multiplyByTen", 5, {})
@@ -296,7 +296,7 @@ def test_call_typescript_success_applies_serializer_and_deserializer(self):
         mock_proc = Mock(
             returncode=0,
             stderr="",
-            stdout=json.dumps({"success": True, "result": {"value": 1, "myName": "a"}}),
+            stdout=json.dumps({"success": True, "result": {"value": 1, "myName": "a"}}, ensure_ascii=False).encode('utf-8'),
         )
         with patch(SUBPROCESS_PATH, return_value=mock_proc):
             result = runner._call_typescript_function("createCustomClass", [1, "a"], {})
@@ -310,7 +310,7 @@ def test_call_typescript_scalar_input_wrapped_in_list(self):
 
         def fake_run(cmd, **_kwargs):
             captured["args"] = json.loads(cmd[2])["args"]
-            return Mock(returncode=0, stderr="", stdout=json.dumps({"success": True, "result": 50}))
+            return Mock(returncode=0, stderr="", stdout=json.dumps({"success": True, "result": 50}, ensure_ascii=False).encode('utf-8'))
 
         with patch(SUBPROCESS_PATH, side_effect=fake_run):
             runner._call_typescript_function("multiplyByTen", 5, {})
@@ -344,7 +344,7 @@ def test_call_typescript_ts_pack_input_wraps_list_into_single_arg(self):
 
         def fake_run(cmd, **_kwargs):
             captured["args"] = json.loads(cmd[2])["args"]
-            return Mock(returncode=0, stderr="", stdout=json.dumps({"success": True, "result": 30}))
+            return Mock(returncode=0, stderr="", stdout=json.dumps({"success": True, "result": 30}, ensure_ascii=False).encode('utf-8'))
 
         with patch(SUBPROCESS_PATH, side_effect=fake_run):
             runner._call_typescript_function("multiplyByTen", [3], {})