diff --git a/tests/ui/for_loop.stderr b/tests/ui/for_loop.stderr
index a18eb20774d5..14082e8790b4 100644
--- a/tests/ui/for_loop.stderr
+++ b/tests/ui/for_loop.stderr
@@ -66,7 +66,7 @@ error: it is more concise to loop over references to containers instead of using
   --> $DIR/for_loop.rs:107:15
    |
 LL |     for _v in vec.iter() {}
-   |               ^^^^^^^^^^
+   |               ^^^^^^^^^^ help: to write this more concisely, try: `&vec`
    |
    = note: `-D clippy::explicit-iter-loop` implied by `-D warnings`
 
@@ -74,13 +74,13 @@ error: it is more concise to loop over references to containers instead of using
   --> $DIR/for_loop.rs:109:15
    |
 LL |     for _v in vec.iter_mut() {}
-   |               ^^^^^^^^^^^^^^
+   |               ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut vec`
 
 error: it is more concise to loop over containers instead of using explicit iteration methods`
   --> $DIR/for_loop.rs:112:15
    |
 LL |     for _v in out_vec.into_iter() {}
-   |               ^^^^^^^^^^^^^^^^^^^
+   |               ^^^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `out_vec`
    |
    = note: `-D clippy::explicit-into-iter-loop` implied by `-D warnings`
 
@@ -88,61 +88,61 @@ error: it is more concise to loop over references to containers instead of using
   --> $DIR/for_loop.rs:115:15
    |
 LL |     for _v in array.into_iter() {}
-   |               ^^^^^^^^^^^^^^^^^
+   |               ^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&array`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:120:15
    |
 LL |     for _v in [1, 2, 3].iter() {}
-   |               ^^^^^^^^^^^^^^^^
+   |               ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[1, 2, 3]`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:124:15
    |
 LL |     for _v in [0; 32].iter() {}
-   |               ^^^^^^^^^^^^^^
+   |               ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[0; 32]`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:129:15
    |
 LL |     for _v in ll.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&ll`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:132:15
    |
 LL |     for _v in vd.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&vd`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:135:15
    |
 LL |     for _v in bh.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&bh`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:138:15
    |
 LL |     for _v in hm.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&hm`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:141:15
    |
 LL |     for _v in bt.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&bt`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:144:15
    |
 LL |     for _v in hs.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&hs`
 
 error: it is more concise to loop over references to containers instead of using explicit iteration methods
   --> $DIR/for_loop.rs:147:15
    |
 LL |     for _v in bs.iter() {}
-   |               ^^^^^^^^^
+   |               ^^^^^^^^^ help: to write this more concisely, try: `&bs`
 
 error: you are iterating over `Iterator::next()` which is an Option; this will compile but is probably not what you want
   --> $DIR/for_loop.rs:149:15