diff --git a/tests/ui/inefficient_to_string.stderr b/tests/ui/inefficient_to_string.stderr
index 1c0490ffa..4be46161e 100644
--- a/tests/ui/inefficient_to_string.stderr
+++ b/tests/ui/inefficient_to_string.stderr
@@ -35,21 +35,21 @@ LL |     let _: String = rrrstring.to_string();
    |
    = help: `&&std::string::String` implements `ToString` through a slower blanket impl, but `std::string::String` has a fast specialization of `ToString`
 
-error: calling `to_string` on `&&std::borrow::Cow<'_, str>`
+error: calling `to_string` on `&&std::borrow::Cow<str>`
   --> $DIR/inefficient_to_string.rs:29:21
    |
 LL |     let _: String = rrcow.to_string();
    |                     ^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(*rrcow).to_string()`
    |
-   = help: `&std::borrow::Cow<'_, str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<'_, str>` has a fast specialization of `ToString`
+   = help: `&std::borrow::Cow<str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<str>` has a fast specialization of `ToString`
 
-error: calling `to_string` on `&&&std::borrow::Cow<'_, str>`
+error: calling `to_string` on `&&&std::borrow::Cow<str>`
   --> $DIR/inefficient_to_string.rs:30:21
    |
 LL |     let _: String = rrrcow.to_string();
    |                     ^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(**rrrcow).to_string()`
    |
-   = help: `&&std::borrow::Cow<'_, str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<'_, str>` has a fast specialization of `ToString`
+   = help: `&&std::borrow::Cow<str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<str>` has a fast specialization of `ToString`
 
 error: aborting due to 6 previous errors
 
diff --git a/tests/ui/transmute.stderr b/tests/ui/transmute.stderr
index 37162ecf4..858208049 100644
--- a/tests/ui/transmute.stderr
+++ b/tests/ui/transmute.stderr
@@ -1,4 +1,4 @@
-error: transmute from a type (`&'a T`) to itself
+error: transmute from a type (`&T`) to itself
   --> $DIR/transmute.rs:19:20
    |
 LL |     let _: &'a T = core::intrinsics::transmute(t);
diff --git a/tests/ui/transmute_ptr_to_ptr.stderr b/tests/ui/transmute_ptr_to_ptr.stderr
index 4d1b8fcc1..61fbea1c1 100644
--- a/tests/ui/transmute_ptr_to_ptr.stderr
+++ b/tests/ui/transmute_ptr_to_ptr.stderr
@@ -1,3 +1,17 @@
+error: transmute from a type (`&T`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:8:5
+   |
+LL |     std::mem::transmute::<&'a T, &'static T>(t)
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::useless-transmute` implied by `-D warnings`
+
+error: transmute from a type (`&T`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:13:5
+   |
+LL |     std::mem::transmute::<&'a T, &'b T>(t)
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
 error: transmute from a pointer to a pointer
   --> $DIR/transmute_ptr_to_ptr.rs:29:29
    |
@@ -36,5 +50,17 @@ error: transmute from a reference to a reference
 LL |         let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t: 1u32 });
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>)`
 
-error: aborting due to 6 previous errors
+error: transmute from a type (`&LifetimeParam`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:50:47
+   |
+LL |     let _: &LifetimeParam<'static> = unsafe { std::mem::transmute(&lp) };
+   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: transmute from a type (`&GenericParam<&LifetimeParam>`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:51:62
+   |
+LL |     let _: &GenericParam<&LifetimeParam<'static>> = unsafe { std::mem::transmute(&GenericParam { t: &lp }) };
+   |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 10 previous errors
 
diff --git a/tests/ui/transmute_ptr_to_ref.stderr b/tests/ui/transmute_ptr_to_ref.stderr
index 2d52e4218..df0598a58 100644
--- a/tests/ui/transmute_ptr_to_ref.stderr
+++ b/tests/ui/transmute_ptr_to_ref.stderr
@@ -42,13 +42,13 @@ error: transmute from a pointer type (`*mut U`) to a reference type (`&T`)
 LL |     let _: &T = std::mem::transmute(om);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(om as *const T)`
 
-error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<'_, u8>`)
+error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<u8>`)
   --> $DIR/transmute_ptr_to_ref.rs:32:32
    |
 LL |     let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(raw as *const Foo<_>)`
 
-error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<'_, &u8>`)
+error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<&u8>`)
   --> $DIR/transmute_ptr_to_ref.rs:34:33
    |
 LL |     let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };