diff --git a/libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionServiceTest.java b/libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionServiceTest.java
index e54c1191b8..989d1cddf7 100644
--- a/libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionServiceTest.java
+++ b/libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionServiceTest.java
@@ -367,6 +367,8 @@ public class MediaSessionServiceTest {
     MediaSessionService service = TestServiceRegistry.getInstance().getServiceInstance();
     MediaSession session = createMediaSession("testAddSessions_removedWhenReleased");
     service.addSession(session);
+    // Wait until connection of session is propagated.
+    MainLooperTestRule.runOnMainSync(() -> {});
     List<MediaSession> sessions = service.getSessions();
     assertThat(sessions.contains(session)).isTrue();
     assertThat(sessions.size()).isEqualTo(2);