diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed
index 4d3eba93bb3e..98288dde6d84 100644
--- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed
+++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed
@@ -4,12 +4,13 @@
 // would otherwise be responsible for
 #![warn(clippy::useless_transmute)]
 #![warn(clippy::transmute_ptr_to_ptr)]
+#![allow(unused_unsafe)]
+#![allow(dead_code)]
 
 use std::mem::{size_of, transmute};
 
 // rustc_typeck::check::cast contains documentation about when a cast `e as U` is 
 // valid, which we quote from below.
-
 fn main() {
     // We should see an error message for each transmute, and no error messages for
     // the casts, since the casts are the recommended fixes.
diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs
index 874812106433..fd5055c08f63 100644
--- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs
+++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs
@@ -4,12 +4,13 @@
 // would otherwise be responsible for
 #![warn(clippy::useless_transmute)]
 #![warn(clippy::transmute_ptr_to_ptr)]
+#![allow(unused_unsafe)]
+#![allow(dead_code)]
 
 use std::mem::{size_of, transmute};
 
 // rustc_typeck::check::cast contains documentation about when a cast `e as U` is 
 // valid, which we quote from below.
-
 fn main() {
     // We should see an error message for each transmute, and no error messages for
     // the casts, since the casts are the recommended fixes.
diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr
index 72fb8689d657..46597acc6c0d 100644
--- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr
+++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr
@@ -1,5 +1,5 @@
 error: transmute from an integer to a pointer
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:19:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:20:9
    |
 LL |         transmute::<usize, *const i32>(usize::MAX)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `usize::MAX as *const i32`
@@ -7,7 +7,7 @@ LL |         transmute::<usize, *const i32>(usize::MAX)
    = note: `-D clippy::useless-transmute` implied by `-D warnings`
 
 error: transmute from a pointer to a pointer
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:25:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:26:9
    |
 LL |         transmute::<*const i32, *const i8>(ptr_i32)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr_i32 as *const i8`
@@ -15,13 +15,13 @@ LL |         transmute::<*const i32, *const i8>(ptr_i32)
    = note: `-D clippy::transmute-ptr-to-ptr` implied by `-D warnings`
 
 error: transmute from a pointer to a pointer
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:33:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:34:9
    |
 LL |         transmute::<*const [i32], *const [u16]>(slice_ptr)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `slice_ptr as *const [u16]`
 
 error: transmute from `*const i32` to `usize` which could be expressed as a pointer cast instead
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:41:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:42:9
    |
 LL |         transmute::<*const i32, usize>(ptr_i32)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr_i32 as usize`
@@ -29,25 +29,25 @@ LL |         transmute::<*const i32, usize>(ptr_i32)
    = note: `-D clippy::transmutes-expressible-as-ptr-casts` implied by `-D warnings`
 
 error: transmute from a reference to a pointer
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:49:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:50:9
    |
 LL |         transmute::<&[i32; 4], *const [i32; 4]>(array_ref)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `array_ref as *const [i32; 4]`
 
 error: transmute from `fn(usize) -> u8 {main::foo}` to `*const usize` which could be expressed as a pointer cast instead
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:57:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:58:9
    |
 LL |         transmute::<fn(usize) -> u8, *const usize>(foo)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `foo as *const usize`
 
 error: transmute from `fn(usize) -> u8 {main::foo}` to `usize` which could be expressed as a pointer cast instead
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:63:9
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:64:9
    |
 LL |         transmute::<fn(usize) -> u8, usize>(foo)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `foo as usize`
 
 error: transmute from a reference to a pointer
-  --> $DIR/transmutes_expressible_as_ptr_casts.rs:76:14
+  --> $DIR/transmutes_expressible_as_ptr_casts.rs:77:14
    |
 LL |     unsafe { transmute::<&[i32; 1], *const u8>(in_param) }
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `in_param as *const [i32; 1] as *const u8`