diff --git a/tests/openpgp/defs.scm b/tests/openpgp/defs.scm
index a6347fe1f..9f780fe23 100644
--- a/tests/openpgp/defs.scm
+++ b/tests/openpgp/defs.scm
@@ -351,6 +351,7 @@
 	       "allow-preset-passphrase"
 	       "no-grab"
 	       "enable-ssh-support"
+               "s2k-count 65536"
 	       (if (flag "--extended-key-format" *args*)
 		   "enable-extended-key-format" "#enable-extended-key-format")
 	       (string-append "pinentry-program " (tool 'pinentry))