diff --git a/library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheUtil.java b/library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheUtil.java
index 8da2fb1def..55347e6143 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheUtil.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheUtil.java
@@ -109,7 +109,6 @@ public final class CacheUtil {
    *
    * @param dataSpec Defines the data to be cached.
    * @param cache A {@link Cache} to store the data.
-   * @param cacheKeyFactory An optional factory for cache keys.
    * @param upstream A {@link DataSource} for reading data not in the cache.
    * @param progressListener A listener to receive progress updates, or {@code null}.
    * @param isCanceled An optional flag that will interrupt caching if set to true.
@@ -120,7 +119,6 @@ public final class CacheUtil {
   public static void cache(
       DataSpec dataSpec,
       Cache cache,
-      @Nullable CacheKeyFactory cacheKeyFactory,
       DataSource upstream,
       @Nullable ProgressListener progressListener,
       @Nullable AtomicBoolean isCanceled)
@@ -128,7 +126,7 @@ public final class CacheUtil {
     cache(
         dataSpec,
         cache,
-        cacheKeyFactory,
+        /* cacheKeyFactory= */ null,
         new CacheDataSource(cache, upstream),
         new byte[DEFAULT_BUFFER_SIZE_BYTES],
         /* priorityTaskManager= */ null,
@@ -139,14 +137,14 @@ public final class CacheUtil {
   }
 
   /**
-   * Caches the data defined by {@code dataSpec} while skipping already cached data. Caching stops
-   * early if end of input is reached and {@code enableEOFException} is false.
+   * Caches the data defined by {@code dataSpec}, skipping already cached data. Caching stops early
+   * if end of input is reached and {@code enableEOFException} is false.
    *
-   * <p>If a {@link PriorityTaskManager} is given, it's used to pause and resume caching depending
-   * on {@code priority} and the priority of other tasks registered to the PriorityTaskManager.
-   * Please note that it's the responsibility of the calling code to call {@link
-   * PriorityTaskManager#add} to register with the manager before calling this method, and to call
-   * {@link PriorityTaskManager#remove} afterwards to unregister.
+   * <p>If a {@link PriorityTaskManager} is provided, it's used to pause and resume caching
+   * depending on {@code priority} and the priority of other tasks registered to the
+   * PriorityTaskManager. Please note that it's the responsibility of the calling code to call
+   * {@link PriorityTaskManager#add} to register with the manager before calling this method, and to
+   * call {@link PriorityTaskManager#remove} afterwards to unregister.
    *
    * <p>This method may be slow and shouldn't normally be called on the main thread.
    *
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest.java b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest.java
index 707ea929b7..5ffa25be46 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheDataSourceTest.java
@@ -360,7 +360,6 @@ public final class CacheDataSourceTest {
     CacheUtil.cache(
         unboundedDataSpec,
         cache,
-        /* cacheKeyFactory= */ null,
         upstream2,
         /* progressListener= */ null,
         /* isCanceled= */ null);
@@ -409,7 +408,6 @@ public final class CacheDataSourceTest {
     CacheUtil.cache(
         unboundedDataSpec,
         cache,
-        /* cacheKeyFactory= */ null,
         upstream2,
         /* progressListener= */ null,
         /* isCanceled= */ null);
@@ -433,7 +431,6 @@ public final class CacheDataSourceTest {
     CacheUtil.cache(
         dataSpec,
         cache,
-        /* cacheKeyFactory= */ null,
         upstream,
         /* progressListener= */ null,
         /* isCanceled= */ null);
@@ -469,7 +466,6 @@ public final class CacheDataSourceTest {
     CacheUtil.cache(
         dataSpec,
         cache,
-        /* cacheKeyFactory= */ null,
         upstream,
         /* progressListener= */ null,
         /* isCanceled= */ null);
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheUtilTest.java b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheUtilTest.java
index 65c9c4d9e5..79d18f25a6 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheUtilTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CacheUtilTest.java
@@ -203,7 +203,6 @@ public final class CacheUtilTest {
     CacheUtil.cache(
         new DataSpec(Uri.parse("test_data")),
         cache,
-        /* cacheKeyFactory= */ null,
         dataSource,
         counters,
         /* isCanceled= */ null);
@@ -220,8 +219,7 @@ public final class CacheUtilTest {
     Uri testUri = Uri.parse("test_data");
     DataSpec dataSpec = new DataSpec(testUri, /* position= */ 10, /* length= */ 20);
     CachingCounters counters = new CachingCounters();
-    CacheUtil.cache(
-        dataSpec, cache, /* cacheKeyFactory= */ null, dataSource, counters, /* isCanceled= */ null);
+    CacheUtil.cache(dataSpec, cache, dataSource, counters, /* isCanceled= */ null);
 
     counters.assertValues(0, 20, 20);
     counters.reset();
@@ -229,7 +227,6 @@ public final class CacheUtilTest {
     CacheUtil.cache(
         new DataSpec(testUri),
         cache,
-        /* cacheKeyFactory= */ null,
         dataSource,
         counters,
         /* isCanceled= */ null);
@@ -247,8 +244,7 @@ public final class CacheUtilTest {
 
     DataSpec dataSpec = new DataSpec(Uri.parse("test_data"));
     CachingCounters counters = new CachingCounters();
-    CacheUtil.cache(
-        dataSpec, cache, /* cacheKeyFactory= */ null, dataSource, counters, /* isCanceled= */ null);
+    CacheUtil.cache(dataSpec, cache, dataSource, counters, /* isCanceled= */ null);
 
     counters.assertValues(0, 100, 100);
     assertCachedData(cache, fakeDataSet);
@@ -264,8 +260,7 @@ public final class CacheUtilTest {
     Uri testUri = Uri.parse("test_data");
     DataSpec dataSpec = new DataSpec(testUri, /* position= */ 10, /* length= */ 20);
     CachingCounters counters = new CachingCounters();
-    CacheUtil.cache(
-        dataSpec, cache, /* cacheKeyFactory= */ null, dataSource, counters, /* isCanceled= */ null);
+    CacheUtil.cache(dataSpec, cache, dataSource, counters, /* isCanceled= */ null);
 
     counters.assertValues(0, 20, 20);
     counters.reset();
@@ -273,7 +268,6 @@ public final class CacheUtilTest {
     CacheUtil.cache(
         new DataSpec(testUri),
         cache,
-        /* cacheKeyFactory= */ null,
         dataSource,
         counters,
         /* isCanceled= */ null);
@@ -290,8 +284,7 @@ public final class CacheUtilTest {
     Uri testUri = Uri.parse("test_data");
     DataSpec dataSpec = new DataSpec(testUri, /* position= */ 0, /* length= */ 1000);
     CachingCounters counters = new CachingCounters();
-    CacheUtil.cache(
-        dataSpec, cache, /* cacheKeyFactory= */ null, dataSource, counters, /* isCanceled= */ null);
+    CacheUtil.cache(dataSpec, cache, dataSource, counters, /* isCanceled= */ null);
 
     counters.assertValues(0, 100, 1000);
     assertCachedData(cache, fakeDataSet);
@@ -340,7 +333,6 @@ public final class CacheUtilTest {
     CacheUtil.cache(
         new DataSpec(Uri.parse("test_data")),
         cache,
-        /* cacheKeyFactory= */ null,
         dataSource,
         counters,
         /* isCanceled= */ null);