diff --git a/libvorbis/build.gradle b/libvorbis/build.gradle
index f075df6..b269b6e 100644
--- a/libvorbis/build.gradle
+++ b/libvorbis/build.gradle
@@ -11,7 +11,11 @@ android {
         versionName "1.0"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-
+        externalNativeBuild {
+            cmake {
+                cppFlags ""
+            }
+        }
     }
     buildTypes {
         release {
@@ -19,6 +23,11 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
 }
 
 dependencies {
diff --git a/libvorbis/src/androidTest/java/com/github/axet/vorbis/ExampleInstrumentedTest.java b/libvorbis/src/androidTest/java/com/github/axet/vorbis/ExampleInstrumentedTest.java
deleted file mode 100644
index 54022ae..0000000
--- a/libvorbis/src/androidTest/java/com/github/axet/vorbis/ExampleInstrumentedTest.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.github.axet.vorbis;
-
-import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumentation test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() throws Exception {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getTargetContext();
-
-        assertEquals("com.github.axet.vorbis.test", appContext.getPackageName());
-    }
-}
diff --git a/libvorbis/src/test/java/com/github/axet/vorbis/ExampleUnitTest.java b/libvorbis/src/test/java/com/github/axet/vorbis/ExampleUnitTest.java
deleted file mode 100644
index ef26331..0000000
--- a/libvorbis/src/test/java/com/github/axet/vorbis/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.github.axet.vorbis;
-
-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