diff --git a/vlib/v/checker/tests/invalid_insert_references_test.out b/vlib/v/checker/tests/invalid_insert_references_test.out
index a0f28a019dfd5c..fb47f1a0508e38 100644
--- a/vlib/v/checker/tests/invalid_insert_references_test.out
+++ b/vlib/v/checker/tests/invalid_insert_references_test.out
@@ -1,3 +1,10 @@
+vlib/v/checker/tests/invalid_insert_references_test.vv:4:12: warning: cannot add a referenece to an immutable object to a mutable array
+    2 | fn test_invalid_insert_references() {
+    3 |     b := 0
+    4 |     mut a := [&b]
+      |               ^
+    5 |     mut c := 1
+    6 |     a << &c
 vlib/v/checker/tests/invalid_insert_references_test.vv:8:7: error: cannot append `int literal` to `[]&int`
     6 |     a << &c
     7 |     c = 2