diff --git a/android/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java b/android/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
index dc2c40d37492..38aa327c8332 100644
--- a/android/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
+++ b/android/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
@@ -88,9 +88,9 @@ public static ListeningScheduledExecutorService noOpScheduledExecutor() {
    * invokeAll/invokeAny} throwing RejectedExecutionException, although a subset of the tasks may
    * already have been executed.
    *
-   * @since 15.0
+   * @since NEXT (taking the place of a method with a different return type from 15.0)
    */
-  public static SameThreadScheduledExecutorService sameThreadScheduledExecutor() {
+  public static ListeningScheduledExecutorService sameThreadScheduledExecutor() {
     return new SameThreadScheduledExecutorService();
   }
 
diff --git a/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java b/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
index dc2c40d37492..38aa327c8332 100644
--- a/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
+++ b/guava-testlib/src/com/google/common/util/concurrent/testing/TestingExecutors.java
@@ -88,9 +88,9 @@ public static ListeningScheduledExecutorService noOpScheduledExecutor() {
    * invokeAll/invokeAny} throwing RejectedExecutionException, although a subset of the tasks may
    * already have been executed.
    *
-   * @since 15.0
+   * @since NEXT (taking the place of a method with a different return type from 15.0)
    */
-  public static SameThreadScheduledExecutorService sameThreadScheduledExecutor() {
+  public static ListeningScheduledExecutorService sameThreadScheduledExecutor() {
     return new SameThreadScheduledExecutorService();
   }