diff --git a/reg-tests/checks/s00003.vtc b/reg-tests/checks/s00003.vtc
index 6ce10b0..ffd3123 100644
--- a/reg-tests/checks/s00003.vtc
+++ b/reg-tests/checks/s00003.vtc
@@ -1,6 +1,8 @@
 varnishtest "Check: smptchk option"
 feature ignore_unknown_macro
 
+#REGTEST_TYPE=slow
+
 barrier b cond 3
 
 syslog S1 -level notice {