diff --git a/library/core/src/test/java/com/google/android/exoplayer2/AudioFocusManagerTest.java b/library/core/src/test/java/com/google/android/exoplayer2/AudioFocusManagerTest.java
index 9a44d6def6..26b990ef77 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/AudioFocusManagerTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/AudioFocusManagerTest.java
@@ -21,6 +21,7 @@ import static com.google.android.exoplayer2.AudioFocusManager.PLAYER_COMMAND_WAI
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.fail;
 import static org.robolectric.annotation.Config.TARGET_SDK;
+import static org.robolectric.annotation.LooperMode.Mode.LEGACY;
 
 import android.content.Context;
 import android.media.AudioFocusRequest;
@@ -36,9 +37,11 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.Shadows;
 import org.robolectric.annotation.Config;
+import org.robolectric.annotation.LooperMode;
 import org.robolectric.shadows.ShadowAudioManager;
 
 /** Unit tests for {@link AudioFocusManager}. */
+@LooperMode(LEGACY)
 @RunWith(AndroidJUnit4.class)
 public class AudioFocusManagerTest {
   private static final int NO_COMMAND_RECEIVED = ~PLAYER_COMMAND_WAIT_FOR_CALLBACK;
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java b/library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java
index eb4f046e9b..4c65e9d546 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java
@@ -18,6 +18,7 @@ package com.google.android.exoplayer2;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertNull;
 import static org.mockito.Mockito.mock;
+import static org.robolectric.annotation.LooperMode.Mode.LEGACY;
 
 import android.net.Uri;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -37,8 +38,10 @@ import java.util.Collections;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.robolectric.annotation.LooperMode;
 
 /** Unit tests for {@link MediaPeriodQueue}. */
+@LooperMode(LEGACY)
 @RunWith(AndroidJUnit4.class)
 public final class MediaPeriodQueueTest {
 
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/DedicatedThreadAsyncMediaCodecAdapterTest.java b/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/DedicatedThreadAsyncMediaCodecAdapterTest.java
index 66b2911349..7ea55b1d82 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/DedicatedThreadAsyncMediaCodecAdapterTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/DedicatedThreadAsyncMediaCodecAdapterTest.java
@@ -20,6 +20,7 @@ import static com.google.android.exoplayer2.testutil.TestUtil.assertBufferInfosE
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertThrows;
 import static org.robolectric.Shadows.shadowOf;
+import static org.robolectric.annotation.LooperMode.Mode.LEGACY;
 
 import android.media.MediaCodec;
 import android.media.MediaFormat;
@@ -36,9 +37,11 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.Shadows;
+import org.robolectric.annotation.LooperMode;
 import org.robolectric.shadows.ShadowLooper;
 
 /** Unit tests for {@link DedicatedThreadAsyncMediaCodecAdapter}. */
+@LooperMode(LEGACY)
 @RunWith(AndroidJUnit4.class)
 public class DedicatedThreadAsyncMediaCodecAdapterTest {
   private DedicatedThreadAsyncMediaCodecAdapter adapter;
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/MultiLockAsyncMediaCodecAdapterTest.java b/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/MultiLockAsyncMediaCodecAdapterTest.java
index 1910d902d0..cfe9cf2900 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/MultiLockAsyncMediaCodecAdapterTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/mediacodec/MultiLockAsyncMediaCodecAdapterTest.java
@@ -20,6 +20,7 @@ import static com.google.android.exoplayer2.testutil.TestUtil.assertBufferInfosE
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertThrows;
 import static org.robolectric.Shadows.shadowOf;
+import static org.robolectric.annotation.LooperMode.Mode.LEGACY;
 
 import android.media.MediaCodec;
 import android.media.MediaFormat;
@@ -36,9 +37,11 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.Shadows;
+import org.robolectric.annotation.LooperMode;
 import org.robolectric.shadows.ShadowLooper;
 
 /** Unit tests for {@link MultiLockAsyncMediaCodecAdapter}. */
+@LooperMode(LEGACY)
 @RunWith(AndroidJUnit4.class)
 public class MultiLockAsyncMediaCodecAdapterTest {
   private MultiLockAsyncMediaCodecAdapter adapter;
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest2.java b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest2.java
index f1baab3b12..8702e887f8 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest2.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest2.java
@@ -18,6 +18,7 @@ package com.google.android.exoplayer2.upstream.cache;
 import static com.google.common.truth.Truth.assertThat;
 import static java.util.Arrays.copyOf;
 import static java.util.Arrays.copyOfRange;
+import static org.robolectric.annotation.LooperMode.Mode.LEGACY;
 
 import android.content.Context;
 import android.net.Uri;
@@ -39,8 +40,10 @@ import java.io.IOException;
 import java.util.Random;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.robolectric.annotation.LooperMode;
 
 /** Additional tests for {@link CacheDataSource}. */
+@LooperMode(LEGACY)
 @RunWith(AndroidJUnit4.class)
 public final class CacheDataSourceTest2 {