diff --git a/bin/named/server.c b/bin/named/server.c
index e3cd057bb8..f50f4db850 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -9825,7 +9825,7 @@ run_server(isc_task_t *task, isc_event_t *event) {
 					  named_g_taskmgr, named_g_timermgr,
 					  named_g_netmgr, named_g_dispatchmgr,
 					  server->task, geoip, named_g_cpus,
-					  &server->interfacemgr),
+					  true, &server->interfacemgr),
 		   "creating interface manager");
 
 	CHECKFATAL(isc_timer_create(named_g_timermgr, isc_timertype_inactive,
diff --git a/lib/ns/include/ns/interfacemgr.h b/lib/ns/include/ns/interfacemgr.h
index fc9e10aadf..c52392156a 100644
--- a/lib/ns/include/ns/interfacemgr.h
+++ b/lib/ns/include/ns/interfacemgr.h
@@ -99,7 +99,7 @@ ns_interfacemgr_create(isc_mem_t *mctx, ns_server_t *sctx,
 		       isc_taskmgr_t *taskmgr, isc_timermgr_t *timermgr,
 		       isc_nm_t *nm, dns_dispatchmgr_t *dispatchmgr,
 		       isc_task_t *task, dns_geoip_databases_t *geoip,
-		       int ncpus, ns_interfacemgr_t **mgrp);
+		       int ncpus, bool scan, ns_interfacemgr_t **mgrp);
 /*%<
  * Create a new interface manager.
  *
diff --git a/lib/ns/interfacemgr.c b/lib/ns/interfacemgr.c
index fdb7338b1c..316d0142f4 100644
--- a/lib/ns/interfacemgr.c
+++ b/lib/ns/interfacemgr.c
@@ -190,7 +190,7 @@ ns_interfacemgr_create(isc_mem_t *mctx, ns_server_t *sctx,
 		       isc_taskmgr_t *taskmgr, isc_timermgr_t *timermgr,
 		       isc_nm_t *nm, dns_dispatchmgr_t *dispatchmgr,
 		       isc_task_t *task, dns_geoip_databases_t *geoip,
-		       int ncpus, ns_interfacemgr_t **mgrp) {
+		       int ncpus, bool scan, ns_interfacemgr_t **mgrp) {
 	isc_result_t result;
 	ns_interfacemgr_t *mgr = NULL;
 
@@ -242,11 +242,13 @@ ns_interfacemgr_create(isc_mem_t *mctx, ns_server_t *sctx,
 	UNUSED(geoip);
 #endif /* if defined(HAVE_GEOIP2) */
 
-	result = isc_nm_routeconnect(nm, route_connected, mgr, 0);
-	if (result != ISC_R_SUCCESS) {
-		isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_INFO,
-			      "unable to open route socket: %s",
-			      isc_result_totext(result));
+	if (scan) {
+		result = isc_nm_routeconnect(nm, route_connected, mgr, 0);
+		if (result != ISC_R_SUCCESS) {
+			isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_INFO,
+				      "unable to open route socket: %s",
+				      isc_result_totext(result));
+		}
 	}
 
 	isc_refcount_init(&mgr->references, 1);
diff --git a/lib/ns/tests/nstest.c b/lib/ns/tests/nstest.c
index 9c291e66bc..15614e1059 100644
--- a/lib/ns/tests/nstest.c
+++ b/lib/ns/tests/nstest.c
@@ -233,7 +233,7 @@ create_managers(void) {
 	CHECK(dns_dispatchmgr_create(mctx, netmgr, &dispatchmgr));
 
 	CHECK(ns_interfacemgr_create(mctx, sctx, taskmgr, timermgr, netmgr,
-				     dispatchmgr, maintask, NULL, ncpus,
+				     dispatchmgr, maintask, NULL, ncpus, false,
 				     &interfacemgr));
 
 	CHECK(ns_listenlist_default(mctx, port, -1, true, &listenon));
@@ -244,12 +244,6 @@ create_managers(void) {
 				   scan_interfaces, NULL, sizeof(isc_event_t));
 	isc_task_send(maintask, &event);
 
-	/*
-	 * There's no straightforward way to determine
-	 * whether the interfaces have been scanned,
-	 * we'll just sleep for a bit and hope.
-	 */
-	ns_test_nap(500000);
 	clientmgr = ns_interfacemgr_getclientmgr(interfacemgr);
 
 	atomic_store(&run_managers, true);