diff --git a/vlib/v/checker/tests/for_in_map_one_variable_err.out b/vlib/v/checker/tests/for_in_map_one_variable_err.out
index ef96d8da3a..ae4281b8cf 100644
--- a/vlib/v/checker/tests/for_in_map_one_variable_err.out
+++ b/vlib/v/checker/tests/for_in_map_one_variable_err.out
@@ -1,4 +1,5 @@
-vlib/v/checker/tests/for_in_map_one_variable_err.v:3:6: error: for in: cannot use one variable in map
+vlib/v/checker/tests/for_in_map_one_variable_err.v:3:6: error: declare a key and a value variable when ranging a map: `for key, val in map {`
+use `_` if you do not need the variable
     1 | fn main() {
     2 |     kvs := {'foo':'bar'}
     3 |     for k in kvs {