diff --git a/test/src/ByteBufferTest.cc b/test/src/ByteBufferTest.cc
index dde11757..01aad006 100644
--- a/test/src/ByteBufferTest.cc
+++ b/test/src/ByteBufferTest.cc
@@ -49,7 +49,16 @@ void testByteBufferReadWrite(ScriptEngine* engine, const Local<Value>& buf) {
   auto buffer = buf.asByteBuffer();
   ASSERT_TRUE(buffer.byteLength() == 8);
   uint8_t* ptr = static_cast<uint8_t*>(buffer.getRawBytes());
+
+  ASSERT_EQ(ptr, buffer.getRawBytesShared().get());
   ASSERT_TRUE(ptr != nullptr);
+#if defined(SCRIPTX_BACKEND_V8) || defined(SCRIPTX_BACKEND_JAVASCRIPTCORE) || defined(SCRIPTX_BACKEND_LUA)
+  ASSERT_EQ(buffer.isShared(), true);
+#endif
+
+  // if buffer is in shared mode
+  // copy data from script into buffer
+  buffer.sync();
 
   EXPECT_EQ(ptr[0], 1);
   EXPECT_EQ(ptr[1], 0);
@@ -61,6 +70,8 @@ void testByteBufferReadWrite(ScriptEngine* engine, const Local<Value>& buf) {
   ptr[6] = 4;
   ptr[7] = 8;
 
+  // if buffer is in shared mode
+  // copy data from buffer into script
   buffer.commit();
 
   auto success =
@@ -115,10 +126,14 @@ return view
 TEST_F(ByteBufferTest, DataView) {
   for (auto&& type : std::initializer_list<std::pair<const char*, ByteBuffer::Type>>{
            {"Int8Array", ByteBuffer::Type::kInt8},
+           {"Uint8Array", ByteBuffer::Type::kUint8},
            {"Int16Array", ByteBuffer::Type::kInt16},
+           {"Uint16Array", ByteBuffer::Type::kUint16},
            {"Int32Array", ByteBuffer::Type::kInt32},
+           {"Uint32Array", ByteBuffer::Type::kUint32},
 #ifdef SCRIPTX_BACKEND_V8
            {"BigInt64Array", ByteBuffer::Type::kInt64},
+           {"BigUint64Array", ByteBuffer::Type::kUint64},
 #endif
            {"Float32Array", ByteBuffer::Type::KFloat32},
            {"Float64Array", ByteBuffer::Type::kFloat64},
diff --git a/test/src/EngineTest.cc b/test/src/EngineTest.cc
index 5b6f20dd..e99f613b 100644
--- a/test/src/EngineTest.cc
+++ b/test/src/EngineTest.cc
@@ -29,6 +29,14 @@ TEST_F(EngineTest, Misc) {
 #if defined(SCRIPTX_BACKEND_V8) || defined(SCRIPTX_BACKEND_LUA)
   EXPECT_GT(size, 0);
 #endif
+
+  EXPECT_FALSE(engine->getEngineVersion().empty());
+
+#ifdef SCRIPTX_LANG_JAVASCRIPT
+  EXPECT_EQ(engine->getLanguageType(), ScriptLanguage::kJavaScript);
+#elif defined(SCRIPTX_LANG_LUA)
+  EXPECT_EQ(engine->getLanguageType(), ScriptLanguage::kLua);
+#endif
 }
 
 TEST_F(EngineTest, UserData) {
diff --git a/test/src/NativeTest.cc b/test/src/NativeTest.cc
index 73b212cf..baccf6e7 100644
--- a/test/src/NativeTest.cc
+++ b/test/src/NativeTest.cc
@@ -787,6 +787,54 @@ TEST_F(NativeTest, TypedAPIClassDefineTest) {
   EXPECT_THROW({ engine->getNativeInstance<BaseClassScriptWrapper>(ins); }, Exception);
 }
 
+TEST_F(NativeTest, MissMatchedType) {
+  class Instance : public ScriptClass {
+   public:
+    using ScriptClass::ScriptClass;
+
+    std::string name;
+
+    static int getAge() { return 0; }
+    static void setAge(int) {}
+
+    void fun(int) {}
+
+    static void sfun(int) {}
+  };
+
+  EngineScope scope(engine);
+
+  auto def = defineClass<Instance>("Instance")
+                 .constructor()
+                 .function("sfun", &Instance::sfun)
+                 .instanceFunction("fun", &Instance::fun)
+                 .build();
+  engine->registerNativeClass(def);
+
+  auto sfun =
+      engine->eval(TS().js("Instance.sfun;").lua("return Instance.sfun").select()).asFunction();
+  auto ins = engine->newNativeClass<Instance>();
+  auto fun = ins.get("fun").asFunction();
+
+#ifdef SCRIPTX_NO_EXCEPTION_ON_BIND_FUNCTION
+  ASSERT_TRUE(sfun.call().isNull());
+  ASSERT_TRUE(sfun.call({}, "empty").isNull());
+  ASSERT_TRUE(sfun.call({}, 0, 0).isNull());
+  ASSERT_TRUE(fun.call().isNull());
+  ASSERT_TRUE(fun.call(ins).isNull());
+  ASSERT_TRUE(fun.call(ins, "empty").isNull());
+  ASSERT_TRUE(fun.call(ins, 0, 0).isNull());
+#else
+  EXPECT_THROW({ sfun.call(); }, Exception);
+  EXPECT_THROW({ sfun.call({}, "empty"); }, Exception);
+  EXPECT_THROW({ sfun.call({}, 0, 0); }, Exception);
+  EXPECT_THROW({ fun.call(); }, Exception);
+  EXPECT_THROW({ fun.call(ins); }, Exception);
+  EXPECT_THROW({ fun.call(ins, "empty"); }, Exception);
+  EXPECT_THROW({ fun.call(ins, 0, 0); }, Exception);
+#endif
+}
+
 namespace {
 
 static const bool gender = true;
@@ -973,6 +1021,48 @@ TEST_F(NativeTest, NativeFounction) {
   EXPECT_THROW({ func.call(); }, Exception);
   EXPECT_THROW({ func.call({}, 1, 2); }, Exception);
   EXPECT_THROW({ func.call({}, ""); }, Exception);
+
+  class Instance : public ScriptClass {
+   public:
+    using ScriptClass::ScriptClass;
+  };
+
+  auto def = defineClass<Instance>("Instance")
+                 .constructor()
+                 .instanceFunction("f", [](Instance*, int) {})
+                 .build();
+  engine->registerNativeClass(def);
+  auto ins = engine->newNativeClass<Instance>();
+  auto insFunc = ins.get("f");
+
+  func.call({}, 0);
+  EXPECT_THROW({ func.call(ins); }, Exception);
+  EXPECT_THROW({ func.call(ins, 1, 2); }, Exception);
+  EXPECT_THROW({ func.call(ins, ""); }, Exception);
+}
+
+TEST_F(NativeTest, OverloadedFunction) {
+  EngineScope scope(engine);
+  auto func1 = [](int) { return 1; };
+  auto func2 = [](const std::string&) { return 2; };
+  auto func3 = [](int, int) { return 3; };
+
+  auto overloaded = script::adaptOverLoadedFunction(func1, func2, func3);
+  auto fun = Function::newFunction(overloaded);
+
+  auto ret = fun.call({}, 0);
+  EXPECT_EQ(ret.asNumber().toInt32(), 1);
+
+  ret = fun.call({}, 3.14);
+  EXPECT_EQ(ret.asNumber().toInt32(), 1);
+
+  ret = fun.call({}, "hello");
+  EXPECT_EQ(ret.asNumber().toInt32(), 2);
+
+  ret = fun.call({}, 1, 2);
+  EXPECT_EQ(ret.asNumber().toInt32(), 3);
+
+  EXPECT_THROW({ fun.call({}, false); }, Exception);
 }
 
 TEST_F(NativeTest, SelectOverloadedFunction) {
diff --git a/test/src/ValueTest.cc b/test/src/ValueTest.cc
index 4010e060..fce5413f 100644
--- a/test/src/ValueTest.cc
+++ b/test/src/ValueTest.cc
@@ -636,6 +636,28 @@ TEST_F(ValueTest, Kinds) {
   test(Function::newFunction([]() {}));
   test(Array::newArray());
   test(ByteBuffer::newByteBuffer(0));
+
+  EXPECT_THROW({Number::newNumber(0).asValue().asObject();}, Exception);
+  EXPECT_THROW({String::newString("hello").asValue().asArray();}, Exception);
+}
+
+TEST_F(ValueTest, Unsupported) {
+  EngineScope engineScope(engine);
+#ifdef SCRIPTX_LANG_JAVASCRIPT
+  auto strange = engine->eval("Symbol('x')");
+#elif defined(SCRIPTX_LANG_LUA)
+  auto lua = lua_interop::currentEngineLua();
+  lua_newuserdata(lua, 4);
+  auto strange = lua_interop::makeLocal<Value>(lua_gettop(lua));
+#else
+  FAIL() << "add test here";
+  auto strange = Local<Value>();
+#endif
+
+  EXPECT_EQ(strange.getKind(), ValueKind::kUnsupported);
+  strange.asUnsupported();
+
+  EXPECT_THROW({Number::newNumber(0).asValue().asUnsupported();}, Exception);
 }
 
 TEST_F(ValueTest, KindNames) {