diff --git a/app/build.gradle b/app/build.gradle
index 2a581304..1eba454f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -43,6 +43,16 @@ dependencies {
     compile 'com.android.support:cardview-v7:25.4.0'
     compile 'com.android.support.constraint:constraint-layout:1.0.2'
     compile 'me.dm7.barcodescanner:zxing:1.9.8'
+
+    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support.test:runner:0.5'
+    androidTestCompile 'com.android.support.test:rules:0.5'
+    // Optional -- Hamcrest library
+    //androidTestCompile 'org.hamcrest:hamcrest-library:1.3'
+    // Optional -- UI testing with Espresso
+    //androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
+    // Optional -- UI testing with UI Automator
+    //androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
 }
 
 dependencyVerification {
diff --git a/app/src/androidTest/java/com/m2049r/xmrwallet/util/HelperTest.java b/app/src/androidTest/java/com/m2049r/xmrwallet/util/HelperTest.java
new file mode 100644
index 00000000..b51324de
--- /dev/null
+++ b/app/src/androidTest/java/com/m2049r/xmrwallet/util/HelperTest.java
@@ -0,0 +1,30 @@
+package com.m2049r.xmrwallet.util;
+
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import com.m2049r.xmrwallet.model.Wallet;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Created by bruno on 14/11/2017.
+ */
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class HelperTest {
+
+    /**
+     *
+     */
+    @Test
+    public void checkValidAddressExample_1() {
+        // random generated address by https://xmr.llcoins.net/addresstests.html
+        String publicAddr = "4GKacjHuTGeReA7PvxPhehDswu3RwpnAqeJV2kdU3MLMNUr4Lt9pxcRiWU2E6BoDReADhCPtHfvNFh1YVNLFoZE5YtaSMc8MSbGGudRftK";
+        Assert.assertTrue(Wallet.isAddressValid(publicAddr, false));
+    }
+}
diff --git a/app/src/androidTest/java/com/m2049r/xmrwallet/util/suite/UnitTestSuite.java b/app/src/androidTest/java/com/m2049r/xmrwallet/util/suite/UnitTestSuite.java
new file mode 100644
index 00000000..d5adfbd7
--- /dev/null
+++ b/app/src/androidTest/java/com/m2049r/xmrwallet/util/suite/UnitTestSuite.java
@@ -0,0 +1,15 @@
+package com.m2049r.xmrwallet.util.suite;
+
+/**
+ * Created by bruno on 14/11/2017.
+ */
+
+import com.m2049r.xmrwallet.util.HelperTest;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+// Runs all unit tests.
+@RunWith(Suite.class)
+@Suite.SuiteClasses({HelperTest.class})
+public class UnitTestSuite {}
\ No newline at end of file