diff --git a/ch05/HelloWorld/.gitignore b/ch05/HelloWorld/.gitignore
index 0d38335..2f2d8fa 100644
--- a/ch05/HelloWorld/.gitignore
+++ b/ch05/HelloWorld/.gitignore
@@ -41,3 +41,4 @@ captures/
 # Keystore files
 *.jks
 
+/git
diff --git a/ch05/HelloWorld/app/build.gradle b/ch05/HelloWorld/app/build.gradle
index 55b6334..18cfeb7 100644
--- a/ch05/HelloWorld/app/build.gradle
+++ b/ch05/HelloWorld/app/build.gradle
@@ -63,7 +63,6 @@ dependencies {
     implementation 'androidx.annotation:annotation:1.1.0'
 
     testImplementation 'junit:junit:4.13'
-    androidTestImplementation 'com.jayway.android.robotium:robotium-solo:5.5.4'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test:rules:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
diff --git a/ch05/HelloWorld/app/src/androidTest/java/com/kousenit/helloworld/MainActivityRobotiumTest.java b/ch05/HelloWorld/app/src/androidTest/java/com/kousenit/helloworld/MainActivityRobotiumTest.java
deleted file mode 100644
index 806f6ab..0000000
--- a/ch05/HelloWorld/app/src/androidTest/java/com/kousenit/helloworld/MainActivityRobotiumTest.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package com.kousenit.helloworld;
-
-import android.test.ActivityInstrumentationTestCase2;
-
-import com.robotium.solo.Solo;
-
-import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
-
-public class MainActivityRobotiumTest
-    extends ActivityInstrumentationTestCase2<MainActivity> {
-
-    private Solo solo;
-
-    public MainActivityRobotiumTest() {
-        super(MainActivity.class);
-    }
-
-    public void setUp() throws Exception {
-        super.setUp();
-        solo = new Solo(getInstrumentation(), getActivity());
-    }
-
-    public void testMyActivity() {
-        solo.assertCurrentActivity("MainActivity", MainActivity.class);
-    }
-
-    public void testSayHello() {
-        solo.enterText(0, "Dolly");
-        solo.clickOnButton(getActivity().getString(R.string.hello_button_label));
-        solo.assertCurrentActivity("WelcomeActivity", WelcomeActivity.class);
-        solo.searchText("Hello, Dolly!");
-    }
-
-    public void tearDown() throws Exception {
-        solo.finishOpenedActivities();
-        super.tearDown();
-    }
-
-}