diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 03e74e0..c646ac4 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -3152,7 +3152,8 @@
     }
 
     @AppModeFull(reason = "Need WiFi support to test the default active network")
-    @Test
+    // NetworkActivityTracker is not mainlined before S.
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
     public void testDefaultNetworkActiveListener() throws Exception {
         final boolean supportWifi = mPackageManager.hasSystemFeature(FEATURE_WIFI);
         final boolean supportTelephony = mPackageManager.hasSystemFeature(FEATURE_TELEPHONY);