diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 11b493d555..664a22e15e 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -7,6 +7,8 @@
   `httpRequestHeaders`.
 * DASH: Support negative @r values in segment timelines
   ([#1787](https://github.com/google/ExoPlayer/issues/1787)).
+* Remove `DefaultDrmSessionManager` factory methods that leak `ExoMediaDrm`
+  instances ([#4721](https://github.com/google/ExoPlayer/issues/4721)).
 * Add `allowedCapturePolicy` field to `AudioAttributes` wrapper to allow to
   opt-out of audio recording.
 * Add `DataSpec.httpRequestHeaders` to set HTTP request headers when connecting
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
index 759f88cdab..6c90a3660d 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
@@ -20,7 +20,6 @@ import android.annotation.TargetApi;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
-import android.text.TextUtils;
 import androidx.annotation.IntDef;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.C;
@@ -106,65 +105,6 @@ public class DefaultDrmSessionManager<T extends ExoMediaCrypto>
 
   /* package */ volatile @Nullable MediaDrmHandler mediaDrmHandler;
 
-  /**
-   * Instantiates a new instance using the Widevine scheme.
-   *
-   * @param callback Performs key and provisioning requests.
-   * @param optionalKeyRequestParameters An optional map of parameters to pass as the last argument
-   *     to {@link ExoMediaDrm#getKeyRequest(byte[], List, int, HashMap)}. May be null.
-   * @throws UnsupportedDrmException If the specified DRM scheme is not supported.
-   */
-  public static DefaultDrmSessionManager<FrameworkMediaCrypto> newWidevineInstance(
-      MediaDrmCallback callback, @Nullable HashMap<String, String> optionalKeyRequestParameters)
-      throws UnsupportedDrmException {
-    return newFrameworkInstance(C.WIDEVINE_UUID, callback, optionalKeyRequestParameters);
-  }
-
-  /**
-   * Instantiates a new instance using the PlayReady scheme.
-   *
-   * <p>Note that PlayReady is unsupported by most Android devices, with the exception of Android TV
-   * devices, which do provide support.
-   *
-   * @param callback Performs key and provisioning requests.
-   * @param customData Optional custom data to include in requests generated by the instance.
-   * @throws UnsupportedDrmException If the specified DRM scheme is not supported.
-   */
-  public static DefaultDrmSessionManager<FrameworkMediaCrypto> newPlayReadyInstance(
-      MediaDrmCallback callback, @Nullable String customData) throws UnsupportedDrmException {
-    HashMap<String, String> optionalKeyRequestParameters;
-    if (!TextUtils.isEmpty(customData)) {
-      optionalKeyRequestParameters = new HashMap<>();
-      optionalKeyRequestParameters.put(PLAYREADY_CUSTOM_DATA_KEY, customData);
-    } else {
-      optionalKeyRequestParameters = null;
-    }
-    return newFrameworkInstance(C.PLAYREADY_UUID, callback, optionalKeyRequestParameters);
-  }
-
-  /**
-   * Instantiates a new instance.
-   *
-   * @param uuid The UUID of the drm scheme.
-   * @param callback Performs key and provisioning requests.
-   * @param optionalKeyRequestParameters An optional map of parameters to pass as the last argument
-   *     to {@link ExoMediaDrm#getKeyRequest(byte[], List, int, HashMap)}. May be null.
-   * @throws UnsupportedDrmException If the specified DRM scheme is not supported.
-   */
-  public static DefaultDrmSessionManager<FrameworkMediaCrypto> newFrameworkInstance(
-      UUID uuid,
-      MediaDrmCallback callback,
-      @Nullable HashMap<String, String> optionalKeyRequestParameters)
-      throws UnsupportedDrmException {
-    return new DefaultDrmSessionManager<>(
-        uuid,
-        FrameworkMediaDrm.newInstance(uuid),
-        callback,
-        optionalKeyRequestParameters,
-        /* multiSession= */ false,
-        INITIAL_DRM_REQUEST_RETRY_COUNT);
-  }
-
   /**
    * @param uuid The UUID of the drm scheme.
    * @param mediaDrm An underlying {@link ExoMediaDrm} for use by the manager.
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashTestRunner.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashTestRunner.java
index 0d966c9080..fb64a7d13b 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashTestRunner.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashTestRunner.java
@@ -30,6 +30,7 @@ import com.google.android.exoplayer2.decoder.DecoderCounters;
 import com.google.android.exoplayer2.drm.DefaultDrmSessionManager;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
 import com.google.android.exoplayer2.drm.FrameworkMediaCrypto;
+import com.google.android.exoplayer2.drm.FrameworkMediaDrm;
 import com.google.android.exoplayer2.drm.HttpMediaDrmCallback;
 import com.google.android.exoplayer2.drm.MediaDrmCallback;
 import com.google.android.exoplayer2.drm.UnsupportedDrmException;
@@ -266,7 +267,13 @@ public final class DashTestRunner {
         MediaDrmCallback drmCallback = new HttpMediaDrmCallback(widevineLicenseUrl,
             new DefaultHttpDataSourceFactory(userAgent));
         DefaultDrmSessionManager<FrameworkMediaCrypto> drmSessionManager =
-            DefaultDrmSessionManager.newWidevineInstance(drmCallback, null);
+            new DefaultDrmSessionManager<>(
+                C.WIDEVINE_UUID,
+                FrameworkMediaDrm.newInstance(C.WIDEVINE_UUID),
+                drmCallback,
+                /* optionalKeyRequestParameters= */ null,
+                /* multiSession= */ false,
+                DefaultDrmSessionManager.INITIAL_DRM_REQUEST_RETRY_COUNT);
         if (!useL1Widevine) {
           drmSessionManager.setPropertyString(
               SECURITY_LEVEL_PROPERTY, WIDEVINE_SECURITY_LEVEL_3);