diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index 5b2c9f7..57bc2be 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -1069,6 +1069,9 @@
 
     @Test
     fun testSetTetheringInterfaceMode_disableEnableEthernet() {
+        // do not run this test if an interface that can be used for tethering already exists.
+        assumeNoInterfaceForTetheringAvailable()
+
         val listener = EthernetStateListener()
         addInterfaceStateListener(listener)