diff --git a/test.sh b/test.sh
index 21b8afd..70906d5 100755
--- a/test.sh
+++ b/test.sh
@@ -1,4 +1,12 @@
 #!/bin/sh
-LIBEXECDIR=. make &&
-test -n "$(getcap ethermess-backend)" || sudo setcap CAP_NET_RAW=ep ethermess-backend &&
+LIBEXECDIR=. CFLAGS=-Werror make || exit 1
+test -n "$(getcap ethermess-backend)" || sudo setcap CAP_NET_RAW=ep ethermess-backend || exit 1
+if ip link show veth0a > /dev/null 2>&1 || ip link show veth0b > /dev/null 2>&1
+then
+	true
+else
+	sudo ip link add veth0a type veth peer name veth0b || exit 1
+	sudo ip link set veth0a up || exit 1
+	sudo ip link set veth0b up || exit 1
+fi
 ./ethermess "$@"