diff --git a/test/test-network/conf/ipv6-prefix-veth-token-prefixstable.network b/test/test-network/conf/ipv6-prefix-veth-token-prefixstable.network
index b0afecdc2b..02056d335b 100644
--- a/test/test-network/conf/ipv6-prefix-veth-token-prefixstable.network
+++ b/test/test-network/conf/ipv6-prefix-veth-token-prefixstable.network
@@ -7,3 +7,8 @@ IPv6AcceptRA=true
 
 [IPv6AcceptRA]
 Token=prefixstable:2002:da8:1::
+# invalid tokens
+Token=prefixstable@
+Token=static
+Token=static:
+Token=static:::