diff --git a/testing/tests/ikev2/net2net-rsa/hosts/moon/etc/ipsec.secrets b/testing/tests/ikev2/net2net-rsa/hosts/moon/etc/ipsec.secrets
index b9ec17dbcb..e86d6aa5cb 100644
--- a/testing/tests/ikev2/net2net-rsa/hosts/moon/etc/ipsec.secrets
+++ b/testing/tests/ikev2/net2net-rsa/hosts/moon/etc/ipsec.secrets
@@ -1,3 +1,3 @@
 # /etc/ipsec.secrets - strongSwan IPsec secrets file
 
-: RSA moonKey.der
+: RSA moonKey.pem
diff --git a/testing/tests/ikev2/net2net-rsa/hosts/sun/etc/ipsec.secrets b/testing/tests/ikev2/net2net-rsa/hosts/sun/etc/ipsec.secrets
index 6aa9ed5620..25a8d737ae 100644
--- a/testing/tests/ikev2/net2net-rsa/hosts/sun/etc/ipsec.secrets
+++ b/testing/tests/ikev2/net2net-rsa/hosts/sun/etc/ipsec.secrets
@@ -1,3 +1,3 @@
 # /etc/ipsec.secrets - strongSwan IPsec secrets file
 
-: RSA sunKey.der
+: RSA sunKey.pem