diff --git a/extensions/flac/build.gradle b/extensions/flac/build.gradle
index 98b81d911a..e5261902c6 100644
--- a/extensions/flac/build.gradle
+++ b/extensions/flac/build.gradle
@@ -27,6 +27,7 @@ android {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion
         consumerProguardFiles 'proguard-rules.txt'
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
 
     sourceSets.main {
@@ -38,6 +39,7 @@ android {
 dependencies {
     implementation 'com.android.support:support-annotations:' + supportLibraryVersion
     implementation project(modulePrefix + 'library-core')
+    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
     androidTestImplementation project(modulePrefix + 'testutils')
     testImplementation project(modulePrefix + 'testutils-robolectric')
 }
diff --git a/extensions/flac/src/androidTest/AndroidManifest.xml b/extensions/flac/src/androidTest/AndroidManifest.xml
index 4e3925d8e3..cfc90117ac 100644
--- a/extensions/flac/src/androidTest/AndroidManifest.xml
+++ b/extensions/flac/src/androidTest/AndroidManifest.xml
@@ -26,6 +26,6 @@
 
   <instrumentation
       android:targetPackage="com.google.android.exoplayer2.ext.flac.test"
-      android:name="android.test.InstrumentationTestRunner"/>
+      android:name="androidx.test.runner.AndroidJUnitRunner"/>
 
 </manifest>
diff --git a/extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacPlaybackTest.java b/extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacPlaybackTest.java
index 07b7a0ccdb..a78556b6c7 100644
--- a/extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacPlaybackTest.java
+++ b/extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacPlaybackTest.java
@@ -15,10 +15,13 @@
  */
 package com.google.android.exoplayer2.ext.flac;
 
+import static androidx.test.InstrumentationRegistry.getContext;
+import static org.junit.Assert.fail;
+
 import android.content.Context;
 import android.net.Uri;
 import android.os.Looper;
-import android.test.InstrumentationTestCase;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.ExoPlayerFactory;
@@ -29,29 +32,31 @@ import com.google.android.exoplayer2.source.ExtractorMediaSource;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Playback tests using {@link LibflacAudioRenderer}.
- */
-public class FlacPlaybackTest extends InstrumentationTestCase {
+/** Playback tests using {@link LibflacAudioRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public class FlacPlaybackTest {
 
   private static final String BEAR_FLAC_URI = "asset:///bear-flac.mka";
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
+  @Before
+  public void setUp() {
     if (!FlacLibrary.isAvailable()) {
       fail("Flac library not available.");
     }
   }
 
+  @Test
   public void testBasicPlayback() throws ExoPlaybackException {
     playUri(BEAR_FLAC_URI);
   }
 
   private void playUri(String uri) throws ExoPlaybackException {
-    TestPlaybackRunnable testPlaybackRunnable = new TestPlaybackRunnable(Uri.parse(uri),
-        getInstrumentation().getContext());
+    TestPlaybackRunnable testPlaybackRunnable =
+        new TestPlaybackRunnable(Uri.parse(uri), getContext());
     Thread thread = new Thread(testPlaybackRunnable);
     thread.start();
     try {
diff --git a/extensions/opus/build.gradle b/extensions/opus/build.gradle
index dc530d05aa..cb12442de8 100644
--- a/extensions/opus/build.gradle
+++ b/extensions/opus/build.gradle
@@ -27,6 +27,7 @@ android {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion
         consumerProguardFiles 'proguard-rules.txt'
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
 
     sourceSets.main {
@@ -37,6 +38,7 @@ android {
 
 dependencies {
     implementation project(modulePrefix + 'library-core')
+    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
 }
 
 ext {
diff --git a/extensions/opus/src/androidTest/AndroidManifest.xml b/extensions/opus/src/androidTest/AndroidManifest.xml
index 9e7f05051e..5ba0f3c0f4 100644
--- a/extensions/opus/src/androidTest/AndroidManifest.xml
+++ b/extensions/opus/src/androidTest/AndroidManifest.xml
@@ -26,6 +26,6 @@
 
   <instrumentation
       android:targetPackage="com.google.android.exoplayer2.ext.opus.test"
-      android:name="android.test.InstrumentationTestRunner"/>
+    android:name="androidx.test.runner.AndroidJUnitRunner"/>
 
 </manifest>
diff --git a/extensions/opus/src/androidTest/java/com/google/android/exoplayer2/ext/opus/OpusPlaybackTest.java b/extensions/opus/src/androidTest/java/com/google/android/exoplayer2/ext/opus/OpusPlaybackTest.java
index 8e3a213af1..cad63f84df 100644
--- a/extensions/opus/src/androidTest/java/com/google/android/exoplayer2/ext/opus/OpusPlaybackTest.java
+++ b/extensions/opus/src/androidTest/java/com/google/android/exoplayer2/ext/opus/OpusPlaybackTest.java
@@ -15,10 +15,13 @@
  */
 package com.google.android.exoplayer2.ext.opus;
 
+import static androidx.test.InstrumentationRegistry.getContext;
+import static org.junit.Assert.fail;
+
 import android.content.Context;
 import android.net.Uri;
 import android.os.Looper;
-import android.test.InstrumentationTestCase;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.ExoPlayerFactory;
@@ -29,29 +32,31 @@ import com.google.android.exoplayer2.source.ExtractorMediaSource;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Playback tests using {@link LibopusAudioRenderer}.
- */
-public class OpusPlaybackTest extends InstrumentationTestCase {
+/** Playback tests using {@link LibopusAudioRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public class OpusPlaybackTest {
 
   private static final String BEAR_OPUS_URI = "asset:///bear-opus.webm";
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
+  @Before
+  public void setUp() {
     if (!OpusLibrary.isAvailable()) {
       fail("Opus library not available.");
     }
   }
 
+  @Test
   public void testBasicPlayback() throws ExoPlaybackException {
     playUri(BEAR_OPUS_URI);
   }
 
   private void playUri(String uri) throws ExoPlaybackException {
-    TestPlaybackRunnable testPlaybackRunnable = new TestPlaybackRunnable(Uri.parse(uri),
-        getInstrumentation().getContext());
+    TestPlaybackRunnable testPlaybackRunnable =
+        new TestPlaybackRunnable(Uri.parse(uri), getContext());
     Thread thread = new Thread(testPlaybackRunnable);
     thread.start();
     try {
diff --git a/extensions/vp9/build.gradle b/extensions/vp9/build.gradle
index 3fb627fd77..96c58d7a57 100644
--- a/extensions/vp9/build.gradle
+++ b/extensions/vp9/build.gradle
@@ -27,6 +27,7 @@ android {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion
         consumerProguardFiles 'proguard-rules.txt'
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
 
     sourceSets.main {
@@ -38,6 +39,7 @@ android {
 dependencies {
     implementation project(modulePrefix + 'library-core')
     implementation 'com.android.support:support-annotations:' + supportLibraryVersion
+    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
     androidTestImplementation 'com.google.truth:truth:' + truthVersion
 }
 
diff --git a/extensions/vp9/src/androidTest/AndroidManifest.xml b/extensions/vp9/src/androidTest/AndroidManifest.xml
index c7ed3d7fb2..214427c4f0 100644
--- a/extensions/vp9/src/androidTest/AndroidManifest.xml
+++ b/extensions/vp9/src/androidTest/AndroidManifest.xml
@@ -26,6 +26,6 @@
 
   <instrumentation
       android:targetPackage="com.google.android.exoplayer2.ext.vp9.test"
-      android:name="android.test.InstrumentationTestRunner"/>
+      android:name="androidx.test.runner.AndroidJUnitRunner"/>
 
 </manifest>
diff --git a/extensions/vp9/src/androidTest/java/com/google/android/exoplayer2/ext/vp9/VpxPlaybackTest.java b/extensions/vp9/src/androidTest/java/com/google/android/exoplayer2/ext/vp9/VpxPlaybackTest.java
index bab7cb6fd7..119347ccbf 100644
--- a/extensions/vp9/src/androidTest/java/com/google/android/exoplayer2/ext/vp9/VpxPlaybackTest.java
+++ b/extensions/vp9/src/androidTest/java/com/google/android/exoplayer2/ext/vp9/VpxPlaybackTest.java
@@ -15,13 +15,15 @@
  */
 package com.google.android.exoplayer2.ext.vp9;
 
+import static androidx.test.InstrumentationRegistry.getContext;
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.fail;
 
 import android.content.Context;
 import android.net.Uri;
 import android.os.Looper;
-import android.test.InstrumentationTestCase;
 import android.util.Log;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.ExoPlayerFactory;
@@ -32,11 +34,13 @@ import com.google.android.exoplayer2.source.ExtractorMediaSource;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Playback tests using {@link LibvpxVideoRenderer}.
- */
-public class VpxPlaybackTest extends InstrumentationTestCase {
+/** Playback tests using {@link LibvpxVideoRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public class VpxPlaybackTest {
 
   private static final String BEAR_URI = "asset:///bear-vp9.webm";
   private static final String BEAR_ODD_DIMENSIONS_URI = "asset:///bear-vp9-odd-dimensions.webm";
@@ -45,22 +49,24 @@ public class VpxPlaybackTest extends InstrumentationTestCase {
 
   private static final String TAG = "VpxPlaybackTest";
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
+  @Before
+  public void setUp() {
     if (!VpxLibrary.isAvailable()) {
       fail("Vpx library not available.");
     }
   }
 
+  @Test
   public void testBasicPlayback() throws ExoPlaybackException {
     playUri(BEAR_URI);
   }
 
+  @Test
   public void testOddDimensionsPlayback() throws ExoPlaybackException {
     playUri(BEAR_ODD_DIMENSIONS_URI);
   }
 
+  @Test
   public void test10BitProfile2Playback() throws ExoPlaybackException {
     if (VpxLibrary.isHighBitDepthSupported()) {
       Log.d(TAG, "High Bit Depth supported.");
@@ -70,6 +76,7 @@ public class VpxPlaybackTest extends InstrumentationTestCase {
     Log.d(TAG, "High Bit Depth not supported.");
   }
 
+  @Test
   public void testInvalidBitstream() {
     try {
       playUri(INVALID_BITSTREAM_URI);
@@ -81,8 +88,8 @@ public class VpxPlaybackTest extends InstrumentationTestCase {
   }
 
   private void playUri(String uri) throws ExoPlaybackException {
-    TestPlaybackRunnable testPlaybackRunnable = new TestPlaybackRunnable(Uri.parse(uri),
-        getInstrumentation().getContext());
+    TestPlaybackRunnable testPlaybackRunnable =
+        new TestPlaybackRunnable(Uri.parse(uri), getContext());
     Thread thread = new Thread(testPlaybackRunnable);
     thread.start();
     try {
diff --git a/library/core/build.gradle b/library/core/build.gradle
index 947972392f..606033fdea 100644
--- a/library/core/build.gradle
+++ b/library/core/build.gradle
@@ -28,7 +28,7 @@ android {
         targetSdkVersion project.ext.targetSdkVersion
         consumerProguardFiles 'proguard-rules.txt'
 
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
 
         // The following argument makes the Android Test Orchestrator run its
         // "pm clear" command after each test invocation. This command ensures
@@ -39,11 +39,11 @@ android {
     // Workaround to prevent circular dependency on project :testutils.
     sourceSets {
         androidTest {
-            java.srcDirs += "../../testutils/src/main/java/"
+            java.srcDirs += '../../testutils/src/main/java/'
         }
         test {
-            java.srcDirs += "../../testutils/src/main/java/"
-            java.srcDirs += "../../testutils_robolectric/src/main/java/"
+            java.srcDirs += '../../testutils/src/main/java/'
+            java.srcDirs += '../../testutils_robolectric/src/main/java/'
         }
     }
 
@@ -60,12 +60,12 @@ dependencies {
     implementation 'com.android.support:support-annotations:' + supportLibraryVersion
     compileOnly 'org.checkerframework:checker-qual:' + checkerframeworkVersion
     compileOnly 'org.checkerframework:checker-compat-qual:' + checkerframeworkVersion
+    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
+    androidTestImplementation 'com.google.auto.value:auto-value-annotations:' + autoValueVersion
     androidTestImplementation 'com.google.dexmaker:dexmaker:' + dexmakerVersion
     androidTestImplementation 'com.google.dexmaker:dexmaker-mockito:' + dexmakerVersion
     androidTestImplementation 'com.google.truth:truth:' + truthVersion
     androidTestImplementation 'org.mockito:mockito-core:' + mockitoVersion
-    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
-    androidTestImplementation 'com.google.auto.value:auto-value-annotations:' + autoValueVersion
     androidTestAnnotationProcessor 'com.google.auto.value:auto-value:' + autoValueVersion
     testImplementation 'com.google.truth:truth:' + truthVersion
     testImplementation 'junit:junit:' + junitVersion
diff --git a/library/core/src/androidTest/AndroidManifest.xml b/library/core/src/androidTest/AndroidManifest.xml
index 1aa47c10f6..d9104b1077 100644
--- a/library/core/src/androidTest/AndroidManifest.xml
+++ b/library/core/src/androidTest/AndroidManifest.xml
@@ -29,6 +29,6 @@
 
   <instrumentation
       android:targetPackage="com.google.android.exoplayer2.core.test"
-      android:name="android.test.InstrumentationTestRunner"/>
+      android:name="androidx.test.runner.AndroidJUnitRunner"/>
 
 </manifest>
diff --git a/playbacktests/build.gradle b/playbacktests/build.gradle
index f40d30f331..a06a3160f1 100644
--- a/playbacktests/build.gradle
+++ b/playbacktests/build.gradle
@@ -26,10 +26,13 @@ android {
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
 }
 
 dependencies {
+    androidTestImplementation 'androidx.test:rules:' + testRunnerVersion
+    androidTestImplementation 'androidx.test:runner:' + testRunnerVersion
     androidTestImplementation project(modulePrefix + 'library-core')
     androidTestImplementation project(modulePrefix + 'library-dash')
     androidTestImplementation project(modulePrefix + 'library-hls')
diff --git a/playbacktests/src/androidTest/AndroidManifest.xml b/playbacktests/src/androidTest/AndroidManifest.xml
index d4fd0b61f1..d458df55bb 100644
--- a/playbacktests/src/androidTest/AndroidManifest.xml
+++ b/playbacktests/src/androidTest/AndroidManifest.xml
@@ -34,6 +34,6 @@
 
   <instrumentation
       android:targetPackage="com.google.android.exoplayer2.playbacktests"
-      android:name="android.test.InstrumentationTestRunner"/>
+      android:name="androidx.test.runner.AndroidJUnitRunner"/>
 
 </manifest>
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/CommonEncryptionDrmTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/CommonEncryptionDrmTest.java
index a4cd35911b..1f8337355b 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/CommonEncryptionDrmTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/CommonEncryptionDrmTest.java
@@ -15,17 +15,24 @@
  */
 package com.google.android.exoplayer2.playbacktests.gts;
 
-import android.test.ActivityInstrumentationTestCase2;
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
+
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.testutil.ActionSchedule;
 import com.google.android.exoplayer2.testutil.HostActivity;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Test playback of encrypted DASH streams using different CENC scheme types.
- */
-public final class CommonEncryptionDrmTest extends ActivityInstrumentationTestCase2<HostActivity> {
+/** Test playback of encrypted DASH streams using different CENC scheme types. */
+@RunWith(AndroidJUnit4.class)
+public final class CommonEncryptionDrmTest {
 
   private static final String TAG = "CencDrmTest";
 
@@ -44,29 +51,26 @@ public final class CommonEncryptionDrmTest extends ActivityInstrumentationTestCa
       .seekAndWait(270000).delay(10000).seekAndWait(200000).delay(10000).seekAndWait(732000)
       .build();
 
+  @Rule public ActivityTestRule<HostActivity> testRule = new ActivityTestRule<>(HostActivity.class);
+
   private DashTestRunner testRunner;
 
-  public CommonEncryptionDrmTest() {
-    super(HostActivity.class);
+  @Before
+  public void setUp() {
+    testRunner =
+        new DashTestRunner(TAG, testRule.getActivity(), getInstrumentation())
+            .setWidevineInfo(MimeTypes.VIDEO_H264, false)
+            .setActionSchedule(ACTION_SCHEDULE_WITH_SEEKS)
+            .setAudioVideoFormats(ID_AUDIO, IDS_VIDEO)
+            .setCanIncludeAdditionalVideoFormats(true);
   }
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
-
-    testRunner = new DashTestRunner(TAG, getActivity(), getInstrumentation())
-        .setWidevineInfo(MimeTypes.VIDEO_H264, false)
-        .setActionSchedule(ACTION_SCHEDULE_WITH_SEEKS)
-        .setAudioVideoFormats(ID_AUDIO, IDS_VIDEO)
-        .setCanIncludeAdditionalVideoFormats(true);
-  }
-
-  @Override
-  protected void tearDown() throws Exception {
+  @After
+  public void tearDown() {
     testRunner = null;
-    super.tearDown();
   }
 
+  @Test
   public void testCencSchemeTypeV18() {
     if (Util.SDK_INT < 18) {
       // Pass.
@@ -75,6 +79,7 @@ public final class CommonEncryptionDrmTest extends ActivityInstrumentationTestCa
     testRunner.setStreamName("test_widevine_h264_scheme_cenc").setManifestUrl(URL_cenc).run();
   }
 
+  @Test
   public void testCbc1SchemeTypeV25() {
     if (Util.SDK_INT < 25) {
       // cbc1 support was added in API 24, but it is stable from API 25 onwards.
@@ -85,6 +90,7 @@ public final class CommonEncryptionDrmTest extends ActivityInstrumentationTestCa
     testRunner.setStreamName("test_widevine_h264_scheme_cbc1").setManifestUrl(URL_cbc1).run();
   }
 
+  @Test
   public void testCbcsSchemeTypeV25() {
     if (Util.SDK_INT < 25) {
       // cbcs support was added in API 24, but it is stable from API 25 onwards.
@@ -95,8 +101,8 @@ public final class CommonEncryptionDrmTest extends ActivityInstrumentationTestCa
     testRunner.setStreamName("test_widevine_h264_scheme_cbcs").setManifestUrl(URL_cbcs).run();
   }
 
+  @Test
   public void testCensSchemeTypeV25() {
     // TODO: Implement once content is available. Track [internal: b/31219813].
   }
-
 }
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashDownloadTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashDownloadTest.java
index 79d39096c5..0dd05e7fd3 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashDownloadTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashDownloadTest.java
@@ -15,10 +15,12 @@
  */
 package com.google.android.exoplayer2.playbacktests.gts;
 
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
 import static com.google.common.truth.Truth.assertWithMessage;
 
 import android.net.Uri;
-import android.test.ActivityInstrumentationTestCase2;
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.offline.DownloaderConstructorHelper;
 import com.google.android.exoplayer2.offline.StreamKey;
 import com.google.android.exoplayer2.source.dash.DashUtil;
@@ -37,36 +39,38 @@ import com.google.android.exoplayer2.util.Util;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Tests downloaded DASH playbacks.
- */
-public final class DashDownloadTest extends ActivityInstrumentationTestCase2<HostActivity> {
+/** Tests downloaded DASH playbacks. */
+@RunWith(AndroidJUnit4.class)
+public final class DashDownloadTest {
 
   private static final String TAG = "DashDownloadTest";
 
   private static final Uri MANIFEST_URI = Uri.parse(DashTestData.H264_MANIFEST);
 
+  @Rule public ActivityTestRule<HostActivity> testRule = new ActivityTestRule<>(HostActivity.class);
+
   private DashTestRunner testRunner;
   private File tempFolder;
   private SimpleCache cache;
   private DefaultHttpDataSourceFactory httpDataSourceFactory;
   private CacheDataSourceFactory offlineDataSourceFactory;
 
-  public DashDownloadTest() {
-    super(HostActivity.class);
-  }
-
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
-    testRunner = new DashTestRunner(TAG, getActivity(), getInstrumentation())
-        .setManifestUrl(DashTestData.H264_MANIFEST)
-        .setFullPlaybackNoSeeking(true)
-        .setCanIncludeAdditionalVideoFormats(false)
-        .setAudioVideoFormats(DashTestData.AAC_AUDIO_REPRESENTATION_ID,
-            DashTestData.H264_CDD_FIXED);
-    tempFolder = Util.createTempDirectory(getActivity(), "ExoPlayerTest");
+  @Before
+  public void setUp() throws Exception {
+    testRunner =
+        new DashTestRunner(TAG, testRule.getActivity(), getInstrumentation())
+            .setManifestUrl(DashTestData.H264_MANIFEST)
+            .setFullPlaybackNoSeeking(true)
+            .setCanIncludeAdditionalVideoFormats(false)
+            .setAudioVideoFormats(
+                DashTestData.AAC_AUDIO_REPRESENTATION_ID, DashTestData.H264_CDD_FIXED);
+    tempFolder = Util.createTempDirectory(testRule.getActivity(), "ExoPlayerTest");
     cache = new SimpleCache(tempFolder, new NoOpCacheEvictor());
     httpDataSourceFactory = new DefaultHttpDataSourceFactory("ExoPlayer", null);
     offlineDataSourceFactory =
@@ -74,16 +78,16 @@ public final class DashDownloadTest extends ActivityInstrumentationTestCase2<Hos
             cache, DummyDataSource.FACTORY, CacheDataSource.FLAG_BLOCK_ON_CACHE);
   }
 
-  @Override
-  protected void tearDown() throws Exception {
+  @After
+  public void tearDown() {
     testRunner = null;
     Util.recursiveDelete(tempFolder);
     cache = null;
-    super.tearDown();
   }
 
   // Download tests
 
+  @Test
   public void testDownload() throws Exception {
     if (Util.SDK_INT < 16) {
       return; // Pass.
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashStreamingTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashStreamingTest.java
index 48b572fe87..9a54ffd07c 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashStreamingTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashStreamingTest.java
@@ -15,9 +15,11 @@
  */
 package com.google.android.exoplayer2.playbacktests.gts;
 
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
 import static com.google.common.truth.Truth.assertThat;
 
-import android.test.ActivityInstrumentationTestCase2;
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.mediacodec.MediaCodecInfo;
@@ -27,11 +29,15 @@ import com.google.android.exoplayer2.testutil.ActionSchedule;
 import com.google.android.exoplayer2.testutil.HostActivity;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Tests DASH playbacks using {@link ExoPlayer}.
- */
-public final class DashStreamingTest extends ActivityInstrumentationTestCase2<HostActivity> {
+/** Tests DASH playbacks using {@link ExoPlayer}. */
+@RunWith(AndroidJUnit4.class)
+public final class DashStreamingTest {
 
   private static final String TAG = "DashStreamingTest";
 
@@ -78,27 +84,24 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
       // Wait 10 seconds, then seek to near end.
       .delay(10000).seek(120000)
       .build();
-  
+
+  @Rule public ActivityTestRule<HostActivity> testRule = new ActivityTestRule<>(HostActivity.class);
+
   private DashTestRunner testRunner;
 
-  public DashStreamingTest() {
-    super(HostActivity.class);
+  @Before
+  public void setUp() {
+    testRunner = new DashTestRunner(TAG, testRule.getActivity(), getInstrumentation());
   }
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
-    testRunner = new DashTestRunner(TAG, getActivity(), getInstrumentation());
-  }
-
-  @Override
-  protected void tearDown() throws Exception {
+  @After
+  public void tearDown() {
     testRunner = null;
-    super.tearDown();
   }
 
   // H264 CDD.
 
+  @Test
   public void testH264Fixed() {
     if (Util.SDK_INT < 16) {
       // Pass.
@@ -113,6 +116,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH264Adaptive() throws DecoderQueryException {
     if (Util.SDK_INT < 16 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -128,6 +132,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH264AdaptiveWithSeeking() throws DecoderQueryException {
     if (Util.SDK_INT < 16 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -145,6 +150,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH264AdaptiveWithRendererDisabling() throws DecoderQueryException {
     if (Util.SDK_INT < 16 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -164,6 +170,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
 
   // H265 CDD.
 
+  @Test
   public void testH265FixedV23() {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -178,6 +185,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH265AdaptiveV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -193,6 +201,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH265AdaptiveWithSeekingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -209,6 +218,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testH265AdaptiveWithRendererDisablingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -227,6 +237,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
 
   // VP9 (CDD).
 
+  @Test
   public void testVp9Fixed360pV23() {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -242,6 +253,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testVp9AdaptiveV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -257,6 +269,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testVp9AdaptiveWithSeekingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -273,6 +286,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testVp9AdaptiveWithRendererDisablingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -292,6 +306,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   // H264: Other frame-rates for output buffer count assertions.
 
   // 23.976 fps.
+  @Test
   public void test23FpsH264FixedV23() {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -308,6 +323,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   }
 
   // 24 fps.
+  @Test
   public void test24FpsH264FixedV23() {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -324,6 +340,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   }
 
   // 29.97 fps.
+  @Test
   public void test29FpsH264FixedV23() {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -342,6 +359,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   // Widevine encrypted media tests.
   // H264 CDD.
 
+  @Test
   public void testWidevineH264FixedV18() throws DecoderQueryException {
     if (Util.SDK_INT < 18) {
       // Pass.
@@ -358,6 +376,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH264AdaptiveV18() throws DecoderQueryException {
     if (Util.SDK_INT < 18 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -374,6 +393,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH264AdaptiveWithSeekingV18() throws DecoderQueryException {
     if (Util.SDK_INT < 18 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -391,6 +411,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH264AdaptiveWithRendererDisablingV18() throws DecoderQueryException {
     if (Util.SDK_INT < 18 || shouldSkipAdaptiveTest(MimeTypes.VIDEO_H264)) {
       // Pass.
@@ -410,6 +431,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
 
   // H265 CDD.
 
+  @Test
   public void testWidevineH265FixedV23() throws DecoderQueryException {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -426,6 +448,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH265AdaptiveV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -442,6 +465,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH265AdaptiveWithSeekingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -459,6 +483,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineH265AdaptiveWithRendererDisablingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -478,6 +503,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
 
   // VP9 (CDD).
 
+  @Test
   public void testWidevineVp9Fixed360pV23() throws DecoderQueryException {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -494,6 +520,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineVp9AdaptiveV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -510,6 +537,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineVp9AdaptiveWithSeekingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -527,6 +555,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
         .run();
   }
 
+  @Test
   public void testWidevineVp9AdaptiveWithRendererDisablingV24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -547,6 +576,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   // H264: Other frame-rates for output buffer count assertions.
 
   // 23.976 fps.
+  @Test
   public void testWidevine23FpsH264FixedV23() throws DecoderQueryException {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -564,6 +594,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   }
 
   // 24 fps.
+  @Test
   public void testWidevine24FpsH264FixedV23() throws DecoderQueryException {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -581,6 +612,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
   }
 
   // 29.97 fps.
+  @Test
   public void testWidevine29FpsH264FixedV23() throws DecoderQueryException {
     if (Util.SDK_INT < 23) {
       // Pass.
@@ -599,6 +631,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
 
   // Decoder info.
 
+  @Test
   public void testDecoderInfoH264() throws DecoderQueryException {
     if (Util.SDK_INT < 16) {
       // Pass.
@@ -609,6 +642,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
     assertThat(Util.SDK_INT < 21 || decoderInfo.adaptive).isTrue();
   }
 
+  @Test
   public void testDecoderInfoH265V24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
@@ -617,6 +651,7 @@ public final class DashStreamingTest extends ActivityInstrumentationTestCase2<Ho
     assertThat(MediaCodecUtil.getDecoderInfo(MimeTypes.VIDEO_H265, false).adaptive).isTrue();
   }
 
+  @Test
   public void testDecoderInfoVP9V24() throws DecoderQueryException {
     if (Util.SDK_INT < 24) {
       // Pass.
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashWidevineOfflineTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashWidevineOfflineTest.java
index 95c9cfbf97..7beaafd143 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashWidevineOfflineTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashWidevineOfflineTest.java
@@ -15,13 +15,16 @@
  */
 package com.google.android.exoplayer2.playbacktests.gts;
 
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assertWithMessage;
+import static org.junit.Assert.fail;
 
 import android.media.MediaDrm.MediaDrmStateException;
 import android.net.Uri;
-import android.test.ActivityInstrumentationTestCase2;
 import android.util.Pair;
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.drm.DrmInitData;
 import com.google.android.exoplayer2.drm.DrmSession.DrmSessionException;
@@ -36,11 +39,15 @@ import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
 import java.io.IOException;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
-/**
- * Tests Widevine encrypted DASH playbacks using offline keys.
- */
-public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCase2<HostActivity> {
+/** Tests Widevine encrypted DASH playbacks using offline keys. */
+@RunWith(AndroidJUnit4.class)
+public final class DashWidevineOfflineTest {
 
   private static final String TAG = "DashWidevineOfflineTest";
   private static final String USER_AGENT = "ExoPlayerPlaybackTests";
@@ -50,21 +57,20 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
   private OfflineLicenseHelper<FrameworkMediaCrypto> offlineLicenseHelper;
   private byte[] offlineLicenseKeySetId;
 
-  public DashWidevineOfflineTest() {
-    super(HostActivity.class);
-  }
+  @Rule public ActivityTestRule<HostActivity> testRule = new ActivityTestRule<>(HostActivity.class);
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
-    testRunner = new DashTestRunner(TAG, getActivity(), getInstrumentation())
-        .setStreamName("test_widevine_h264_fixed_offline")
-        .setManifestUrl(DashTestData.WIDEVINE_H264_MANIFEST)
-        .setWidevineInfo(MimeTypes.VIDEO_H264, true)
-        .setFullPlaybackNoSeeking(true)
-        .setCanIncludeAdditionalVideoFormats(false)
-        .setAudioVideoFormats(DashTestData.WIDEVINE_AAC_AUDIO_REPRESENTATION_ID,
-            DashTestData.WIDEVINE_H264_CDD_FIXED);
+  @Before
+  public void setUp() throws Exception {
+    testRunner =
+        new DashTestRunner(TAG, testRule.getActivity(), getInstrumentation())
+            .setStreamName("test_widevine_h264_fixed_offline")
+            .setManifestUrl(DashTestData.WIDEVINE_H264_MANIFEST)
+            .setWidevineInfo(MimeTypes.VIDEO_H264, true)
+            .setFullPlaybackNoSeeking(true)
+            .setCanIncludeAdditionalVideoFormats(false)
+            .setAudioVideoFormats(
+                DashTestData.WIDEVINE_AAC_AUDIO_REPRESENTATION_ID,
+                DashTestData.WIDEVINE_H264_CDD_FIXED);
 
     boolean useL1Widevine = DashTestRunner.isL1WidevineAvailable(MimeTypes.VIDEO_H264);
     String widevineLicenseUrl = DashTestData.getWidevineLicenseUrl(true, useL1Widevine);
@@ -75,8 +81,8 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
     }
   }
 
-  @Override
-  protected void tearDown() throws Exception {
+  @After
+  public void tearDown() throws Exception {
     testRunner = null;
     if (offlineLicenseKeySetId != null) {
       releaseLicense();
@@ -86,11 +92,11 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
     }
     offlineLicenseHelper = null;
     httpDataSourceFactory = null;
-    super.tearDown();
   }
 
   // Offline license tests
 
+  @Test
   public void testWidevineOfflineLicenseV22() throws Exception {
     if (Util.SDK_INT < 22) {
       return; // Pass.
@@ -103,6 +109,7 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
     assertThat(offlineLicenseKeySetId).isNotNull();
   }
 
+  @Test
   public void testWidevineOfflineReleasedLicenseV22() throws Throwable {
     if (Util.SDK_INT < 22) {
       return; // Pass.
@@ -129,6 +136,7 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
     }
   }
 
+  @Test
   public void testWidevineOfflineExpiredLicenseV22() throws Exception {
     if (Util.SDK_INT < 22) {
       return; // Pass.
@@ -158,6 +166,7 @@ public final class DashWidevineOfflineTest extends ActivityInstrumentationTestCa
     testRunner.run();
   }
 
+  @Test
   public void testWidevineOfflineLicenseExpiresOnPauseV22() throws Exception {
     if (Util.SDK_INT < 22) {
       return; // Pass.
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
index 5157ab672c..669a5a5a0d 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
@@ -15,11 +15,13 @@
  */
 package com.google.android.exoplayer2.playbacktests.gts;
 
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
+
 import android.media.MediaCodecInfo.AudioCapabilities;
 import android.media.MediaCodecInfo.CodecCapabilities;
 import android.media.MediaCodecInfo.CodecProfileLevel;
 import android.media.MediaCodecInfo.VideoCapabilities;
-import android.test.InstrumentationTestCase;
+import androidx.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.mediacodec.MediaCodecInfo;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil.DecoderQueryException;
@@ -29,9 +31,13 @@ import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
 import java.util.Arrays;
 import java.util.List;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 /** Tests enumeration of decoders using {@link MediaCodecUtil}. */
-public class EnumerateDecodersTest extends InstrumentationTestCase {
+@RunWith(AndroidJUnit4.class)
+public class EnumerateDecodersTest {
 
   private static final String TAG = "EnumerateDecodersTest";
 
@@ -40,14 +46,14 @@ public class EnumerateDecodersTest extends InstrumentationTestCase {
 
   private MetricsLogger metricsLogger;
 
-  @Override
-  protected void setUp() throws Exception {
-    super.setUp();
+  @Before
+  public void setUp() {
     metricsLogger =
         MetricsLogger.Factory.createDefault(
             getInstrumentation(), TAG, REPORT_NAME, REPORT_OBJECT_NAME);
   }
 
+  @Test
   public void testEnumerateDecoders() throws Exception {
     enumerateDecoders(MimeTypes.VIDEO_H263);
     enumerateDecoders(MimeTypes.VIDEO_H264);