diff --git a/testing/tests/ikev1/dpd-restart/hosts/carol/etc/strongswan.conf b/testing/tests/ikev1/dpd-restart/hosts/carol/etc/strongswan.conf
index ddddb951c..42e9025a0 100644
--- a/testing/tests/ikev1/dpd-restart/hosts/carol/etc/strongswan.conf
+++ b/testing/tests/ikev1/dpd-restart/hosts/carol/etc/strongswan.conf
@@ -2,5 +2,5 @@
 
 charon {
   load = random nonce openssl pem pkcs1 curl revocation vici kernel-netlink socket-default
-  retransmit_timeout = 4.0
+  retransmit_tries = 6
 }