diff --git a/tests/bsdtestharness.c b/tests/bsdtestharness.c
index ca52d6e97..38ef26ac9 100644
--- a/tests/bsdtestharness.c
+++ b/tests/bsdtestharness.c
@@ -152,6 +152,7 @@ main(int argc, char *argv[])
 	assert(pid > 0);
 
 #if defined(__linux__)
+      (void)to;
 	int status;
 	struct rusage usage;
 	struct timeval tv_stop, tv_wall;
diff --git a/tests/dispatch_apply.c b/tests/dispatch_apply.c
index fa7fab53f..2c52da993 100644
--- a/tests/dispatch_apply.c
+++ b/tests/dispatch_apply.c
@@ -57,6 +57,8 @@ static void busythread(void *ignored)
 	/* prevent i and j been optimized out */
 	volatile uint64_t i = 0, j = 0;
 
+	(void)i;
+	(void)j;
 	OSAtomicIncrement32(&busy_threads_started);
 
 	while(!all_done)