diff --git a/repos/libports/run/nic_router.run b/repos/libports/run/nic_router.run
index ff0d04e260..360afc2290 100644
--- a/repos/libports/run/nic_router.run
+++ b/repos/libports/run/nic_router.run
@@ -83,7 +83,7 @@ append config {
 	<start name="nic_router" caps="200" priority="-1">
 		<resource name="RAM" quantum="10M"/>
 		<provides><service name="Nic"/></provides>
-		<config rtt_sec="6" verbose="no">
+		<config rtt_sec="12" verbose="no">
 
 			<policy label_prefix="udp_client_1"  domain="udp_client_1"  />
 			<policy label_prefix="http_client_3" domain="http_client_3" />
@@ -157,4 +157,4 @@ install_config $config
 
 build_boot_image $boot_modules
 
-run_genode_until {.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n} 120
+run_genode_until {.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n} 240
diff --git a/repos/libports/src/test/lwip/udp/client/main.cc b/repos/libports/src/test/lwip/udp/client/main.cc
index db385748f2..b372bea08d 100644
--- a/repos/libports/src/test/lwip/udp/client/main.cc
+++ b/repos/libports/src/test/lwip/udp/client/main.cc
@@ -39,7 +39,7 @@ void Libc::Component::construct(Libc::Env &env)
 {
 	/* wait a while for the server to come up */
 	Timer::Connection timer(env);
-	timer.msleep(3000);
+	timer.msleep(6000);
 
 	/* create socket */
 	int s = socket(AF_INET, SOCK_DGRAM, 0 );