diff --git a/core/src/test/java/com/github/shadowsocks/ExampleUnitTest.java b/core/src/test/java/com/github/shadowsocks/ExampleUnitTest.java
deleted file mode 100644
index 997edea9..00000000
--- a/core/src/test/java/com/github/shadowsocks/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.github.shadowsocks;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
-    }
-}
\ No newline at end of file
diff --git a/plugin/src/test/java/com/github/shadowsocks/plugin/ExampleUnitTest.java b/plugin/src/test/java/com/github/shadowsocks/plugin/ExampleUnitTest.java
deleted file mode 100644
index 7b4ec7d4..00000000
--- a/plugin/src/test/java/com/github/shadowsocks/plugin/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.github.shadowsocks.plugin;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
-    }
-}
\ No newline at end of file
diff --git a/plugin/src/test/java/com/github/shadowsocks/plugin/PluginOptionsTest.kt b/plugin/src/test/java/com/github/shadowsocks/plugin/PluginOptionsTest.kt
new file mode 100644
index 00000000..9829f2de
--- /dev/null
+++ b/plugin/src/test/java/com/github/shadowsocks/plugin/PluginOptionsTest.kt
@@ -0,0 +1,38 @@
+/*******************************************************************************
+ *                                                                             *
+ *  Copyright (C) 2017 by Max Lv <max.c.lv@gmail.com>                          *
+ *  Copyright (C) 2017 by Mygod Studio <contact-shadowsocks-android@mygod.be>  *
+ *                                                                             *
+ *  This program is free software: you can redistribute it and/or modify       *
+ *  it under the terms of the GNU General Public License as published by       *
+ *  the Free Software Foundation, either version 3 of the License, or          *
+ *  (at your option) any later version.                                        *
+ *                                                                             *
+ *  This program is distributed in the hope that it will be useful,            *
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of             *
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
+ *  GNU General Public License for more details.                               *
+ *                                                                             *
+ *  You should have received a copy of the GNU General Public License          *
+ *  along with this program. If not, see <http://www.gnu.org/licenses/>.       *
+ *                                                                             *
+ *******************************************************************************/
+
+package com.github.shadowsocks.plugin
+
+import org.junit.Assert
+import org.junit.Test
+
+class PluginOptionsTest {
+    @Test
+    fun equal() {
+        val o1 = PluginOptions("obfs-local;obfs=http;obfs-host=localhost")
+        val o2 = PluginOptions("obfs-local", "obfs-host=localhost;obfs=http")
+        Assert.assertEquals(o1.hashCode(), o2.hashCode())
+        Assert.assertEquals(true, o1 == o2)
+        val o3 = PluginOptions(o1.toString(false))
+        Assert.assertEquals(true, o2 == o3)
+        val o4 = PluginOptions(o2.id, o2.toString())
+        Assert.assertEquals(true, o3 == o4)
+    }
+}