diff --git a/tests/sys/vm/stack/stack_mprotect_exec_test.c b/tests/sys/vm/stack/stack_mprotect_exec_test.c
index d12d99ea39e..ba5a1d5cb85 100644
--- a/tests/sys/vm/stack/stack_mprotect_exec_test.c
+++ b/tests/sys/vm/stack/stack_mprotect_exec_test.c
@@ -12,8 +12,15 @@
 #include <vm/vm_param.h>
 
 #include <atf-c.h>
+#include <signal.h>
 #include <unistd.h>
 
+static void
+sigsegv_handler(int sig __unused)
+{
+
+	atf_tc_fail("Invalid stack protection mode after grows");
+}
 
 ATF_TC_WITHOUT_HEAD(mprotect_exec_test);
 ATF_TC_BODY(mprotect_exec_test, tc)
@@ -22,6 +29,8 @@ ATF_TC_BODY(mprotect_exec_test, tc)
 	char *addr, *guard;
 	size_t alloc_size;
 
+	signal(SIGSEGV, sigsegv_handler);
+
 	pagesize = sysconf(_SC_PAGESIZE);
 	ATF_REQUIRE(pagesize > 0);