diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index b62db04..0e9ea0c 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -3061,6 +3061,7 @@
 
         try {
             final Network cellNetwork = networkCallbackRule.requestCell();
+            ensureCellIsValidatedBeforeMockingValidationUrls();
             final Network wifiNetwork = prepareValidatedNetwork();
 
             final TestableNetworkCallback defaultCb =