diff --git a/tests/sys/netinet/libalias/2_natout.c b/tests/sys/netinet/libalias/2_natout.c
index 9eb9148f8377..513ff359b1d9 100644
--- a/tests/sys/netinet/libalias/2_natout.c
+++ b/tests/sys/netinet/libalias/2_natout.c
@@ -311,7 +311,7 @@ ATF_TC_BODY(7_stress, dummy)
 		struct in_addr src, dst;
 		uint16_t sport, dport, aport;
 	} *batch;
-	size_t const batch_size = 12000;
+	size_t const batch_size = 1200;
 	size_t const rounds = 25;
 	size_t i, j;