diff --git a/vlib/compiler/tests/defer_test.v b/vlib/compiler/tests/defer_test.v
index b64292a86b..cc6063d808 100644
--- a/vlib/compiler/tests/defer_test.v
+++ b/vlib/compiler/tests/defer_test.v
@@ -21,7 +21,7 @@ fn set_num(i int, n mut Num) {
 	if i < 5 {
 		return
 	} else {
-		n.val+=1
+		n.val++
 	}
 }
 
diff --git a/vlib/compiler/tests/mut_test.v b/vlib/compiler/tests/mut_test.v
index 8b039ffc7c..32e53b5f9d 100644
--- a/vlib/compiler/tests/mut_test.v
+++ b/vlib/compiler/tests/mut_test.v
@@ -41,8 +41,8 @@ fn test_mut_2() {
 	b.a[zero].v << 5
 
 	b.a[0].v[zero] = 3
-	b.a[0].v[b.a[zero].v[zero]]++
-	b.a[0].v[b.a[0].v[zero]]++
+	b.a[0].v[b.a[zero].v[zero]]+= 2 -1 // TODO
+	b.a[0].v[b.a[0].v[zero]]+= 2 - 1 // TODO
 
 	assert b.a[0].v.len == 5
 	assert b.a[0].v[0] == 3