diff --git a/staticlibs/testutils/devicetests/com/android/testutils/AutoCloseTestInterfaceRule.kt b/staticlibs/testutils/devicetests/com/android/testutils/AutoCloseTestInterfaceRule.kt
index 89de0b3d7a..2b625f6573 100644
--- a/staticlibs/testutils/devicetests/com/android/testutils/AutoCloseTestInterfaceRule.kt
+++ b/staticlibs/testutils/devicetests/com/android/testutils/AutoCloseTestInterfaceRule.kt
@@ -20,6 +20,7 @@ import android.Manifest.permission.MANAGE_TEST_NETWORKS
 import android.content.Context
 import android.net.TestNetworkInterface
 import android.net.TestNetworkManager
+import android.net.TestNetworkManager.TestInterfaceRequest
 import org.junit.rules.TestRule
 import org.junit.runner.Description
 import org.junit.runners.model.Statement
@@ -40,6 +41,14 @@ class AutoCloseTestInterfaceRule(
         }
     }
 
+    fun createTestInterface(req: TestInterfaceRequest): TestNetworkInterface {
+        return runAsShell(MANAGE_TEST_NETWORKS) {
+            tnm.createTestInterface(req)
+        }.also {
+            ifaces.add(it)
+        }
+    }
+
     private fun closeAllInterfaces() {
         // TODO: wait on RTM_DELLINK before proceeding.
         for (iface in ifaces) {