diff --git a/testutils/src/test/java/com/google/android/exoplayer2/testutil/TestUtilTest.java b/testutils/src/test/java/com/google/android/exoplayer2/testutil/TestUtilTest.java
index 0a999c4161a..379f3ebd62d 100644
--- a/testutils/src/test/java/com/google/android/exoplayer2/testutil/TestUtilTest.java
+++ b/testutils/src/test/java/com/google/android/exoplayer2/testutil/TestUtilTest.java
@@ -41,6 +41,6 @@ public void createRobolectricConditionVariable_blockWithTimeout_blocksForAtLeast
     long startTimeMs = System.currentTimeMillis();
     assertThat(conditionVariable.block(/* timeoutMs= */ 500)).isFalse();
     long endTimeMs = System.currentTimeMillis();
-    assertThat(endTimeMs - startTimeMs).isAtLeast(500);
+    assertThat(endTimeMs - startTimeMs).isAtLeast(500L);
   }
 }