diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index 458d225..20d4f78 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -68,14 +68,15 @@
 import com.android.testutils.runAsShell
 import com.android.testutils.waitForIdle
 import org.junit.After
-import org.junit.Assume.assumeTrue
 import org.junit.Assume.assumeFalse
+import org.junit.Assume.assumeTrue
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import java.net.Inet6Address
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.ExecutionException
+import java.util.concurrent.TimeoutException
 import java.util.concurrent.TimeUnit
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
@@ -458,6 +459,21 @@
         }
     }
 
+    private fun assumeNoInterfaceForTetheringAvailable() {
+        // Interfaces that have configured NetworkCapabilities will never be used for tethering,
+        // see aosp/2123900.
+        try {
+            // assumeException does not exist.
+            requestTetheredInterface().expectOnAvailable()
+            // interface used for tethering is available, throw an assumption error.
+            assumeTrue(false)
+        } catch (e: TimeoutException) {
+            // do nothing -- the TimeoutException indicates that no interface is available for
+            // tethering.
+            releaseTetheredInterface()
+        }
+    }
+
     // TODO: this function is now used in two places (EthernetManagerTest and
     // EthernetTetheringTest), so it should be moved to testutils.
     private fun isAdbOverNetwork(): Boolean {
@@ -469,6 +485,7 @@
     @Test
     fun testCallbacks_forServerModeInterfaces() {
         // do not run this test when adb might be connected over ethernet.
+        // TODO: Consider using assumeNoInterfaceForTetheringAvailable() instead, so this runs on CF
         assumeFalse(isAdbOverNetwork())
 
         val listener = EthernetStateListener()
@@ -651,4 +668,26 @@
         iface.setCarrierEnabled(false)
         cb.eventuallyExpectLost()
     }
+
+    @Test
+    fun testRemoveInterface_whileInServerMode() {
+        assumeNoInterfaceForTetheringAvailable()
+
+        val listener = EthernetStateListener()
+        addInterfaceStateListener(listener)
+
+        val iface = createInterface()
+        val ifaceName = requestTetheredInterface().expectOnAvailable()
+
+        assertEquals(iface.name, ifaceName)
+        listener.eventuallyExpect(iface, STATE_LINK_UP, ROLE_SERVER)
+
+        removeInterface(iface)
+
+        // Note: removeInterface already verifies that a STATE_ABSENT, ROLE_NONE callback is
+        // received, but it can't hurt to explicitly check for it.
+        listener.expectCallback(iface, STATE_ABSENT, ROLE_NONE)
+        releaseTetheredInterface()
+        listener.assertNoCallback()
+    }
 }