diff --git a/tests/issue_183_001.phpt b/tests/issue_183_001.phpt
new file mode 100644
index 0000000..8469940
--- /dev/null
+++ b/tests/issue_183_001.phpt
@@ -0,0 +1,30 @@
+--TEST--
+Test V8::executeString() : Method access on derived classes (protected)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+class Foo extends \V8Js
+{
+	protected function hello()
+	{
+		print("Hello World\n");
+	}
+}
+
+$JS = <<< EOT
+PHP.hello();
+EOT;
+
+$v8 = new Foo();
+$v8->executeString($JS);
+
+?>
+===EOF===
+--EXPECTF--
+Fatal error: Uncaught exception 'V8JsScriptException' with message 'V8Js::compileString():1: TypeError: PHP.hello is not a function' in %s
+Stack trace:
+#0 %s: V8Js->executeString('PHP.hello();')
+#1 {main}
+  thrown in %s on line 16
diff --git a/tests/issue_183_002.phpt b/tests/issue_183_002.phpt
new file mode 100644
index 0000000..fa8704b
--- /dev/null
+++ b/tests/issue_183_002.phpt
@@ -0,0 +1,30 @@
+--TEST--
+Test V8::executeString() : Method access on derived classes (private)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+class Foo extends \V8Js
+{
+	private function hello()
+	{
+		print("Hello World\n");
+	}
+}
+
+$JS = <<< EOT
+PHP.hello();
+EOT;
+
+$v8 = new Foo();
+$v8->executeString($JS);
+
+?>
+===EOF===
+--EXPECTF--
+Fatal error: Uncaught exception 'V8JsScriptException' with message 'V8Js::compileString():1: TypeError: PHP.hello is not a function' in %s
+Stack trace:
+#0 %s: V8Js->executeString('PHP.hello();')
+#1 {main}
+  thrown in %s on line 16