diff --git a/test/unit/junk.c b/test/unit/junk.c
index 733f661e..01d314b3 100644
--- a/test/unit/junk.c
+++ b/test/unit/junk.c
@@ -244,7 +244,7 @@ int
 main(void)
 {
 
-	assert(opt_junk_alloc || opt_junk_free);
+	assert(!config_fill || opt_junk_alloc || opt_junk_free);
 	return (test(
 	    test_junk_small,
 	    test_junk_large,