diff --git a/testing/tests/ikev1/rw-cert/hosts/carol/etc/strongswan.conf b/testing/tests/ikev1/rw-cert/hosts/carol/etc/strongswan.conf
index c2d2b14ac..72ff765c3 100644
--- a/testing/tests/ikev1/rw-cert/hosts/carol/etc/strongswan.conf
+++ b/testing/tests/ikev1/rw-cert/hosts/carol/etc/strongswan.conf
@@ -1,7 +1,7 @@
 # /etc/strongswan.conf - strongSwan configuration file
 
 pluto {
-  load = test-vectors sha1 sha2 md5 aes des hmac pem pkcs1 x509 gmp random curl
+  load = test-vectors sha1 sha2 md5 aes des hmac pem pkcs1 x509 gmp random curl xauth
 }
 
 # pluto uses optimized DH exponent sizes (RFC 3526)
diff --git a/testing/tests/ikev1/rw-cert/hosts/moon/etc/strongswan.conf b/testing/tests/ikev1/rw-cert/hosts/moon/etc/strongswan.conf
index 3ec745baa..72ff765c3 100644
--- a/testing/tests/ikev1/rw-cert/hosts/moon/etc/strongswan.conf
+++ b/testing/tests/ikev1/rw-cert/hosts/moon/etc/strongswan.conf
@@ -1,7 +1,7 @@
 # /etc/strongswan.conf - strongSwan configuration file
 
 pluto {
-  load = test-vectors sha1 sha2 md5 aes des hmac pem pkcs1 x509 x509 gmp random curl
+  load = test-vectors sha1 sha2 md5 aes des hmac pem pkcs1 x509 gmp random curl xauth
 }
 
 # pluto uses optimized DH exponent sizes (RFC 3526)