diff --git a/tests.c b/tests.c
index ac3e99a..fa08f9d 100644
--- a/tests.c
+++ b/tests.c
@@ -5,9 +5,8 @@
 
 void divide_by_zero() {
 	// here we can test the divide by zero without gcc noticing
-	int x = 0;
-	int y = 5;
-	int z = y/x;
+	__asm__("mov eax, 0");
+	__asm__("div al");
 }
 
 void test_serial_write() {