diff --git a/test/test-network/conf/25-ipv6-address-label-section.network b/test/test-network/conf/25-ipv6-address-label-section.network
index 1e3f47b567..89a5c2a6bc 100644
--- a/test/test-network/conf/25-ipv6-address-label-section.network
+++ b/test/test-network/conf/25-ipv6-address-label-section.network
@@ -8,3 +8,27 @@ IPv6AcceptRA=no
 [IPv6AddressLabel]
 Label=4444
 Prefix=2004:da8:1:0::/64
+
+# invalid sections
+[IPv6AddressLabel]
+# No Label=
+Prefix=2004:da8:1:1::/64
+
+[IPv6AddressLabel]
+# No Prefix=
+Label=4445
+
+[IPv6AddressLabel]
+# Invalid label
+Label=0xffffffff
+Prefix=2004:da8:1:2::/64
+
+[IPv6AddressLabel]
+# IPv4 mapped prefix
+Label=4446
+Prefix=::ffff:c0a8:0/120
+
+[IPv6AddressLabel]
+# Invalid prefix
+Label=4447
+Prefix=192.168.1.0/24