diff --git a/test/asprintf.c b/test/asprintf.c
index 2640337..c33a43a 100644
--- a/test/asprintf.c
+++ b/test/asprintf.c
@@ -61,5 +61,5 @@ Theory((struct format_test *fmt), asprintf, valid) {
 
 Test(asprintf, invalid) {
     char *actual;
-    cr_expect_eq(cr_asprintf(&actual, "%"), -1);
+    cr_expect_lt(cr_asprintf(&actual, "%"), 0);
 }