diff --git a/src/tests.asm b/src/tests.asm
index dafadc5..15760df 100644
--- a/src/tests.asm
+++ b/src/tests.asm
@@ -294,7 +294,7 @@ _start:
 	; TEST 7: perror('Test') ;rax=-999
 	printTest(perror_invalid2)
 	mov	rax, -999
-	xor	rdi, rdi
+	lea	rdi, [rel perrorStr]
 	call	perror
 	assert_eq(-999)
 %endif