diff --git a/tests/ui/associated-types/associated-types-incomplete-object.stderr b/tests/ui/associated-types/associated-types-incomplete-object.stderr
index 0c9761afeb517..c1b0a4c500c48 100644
--- a/tests/ui/associated-types/associated-types-incomplete-object.stderr
+++ b/tests/ui/associated-types/associated-types-incomplete-object.stderr
@@ -25,7 +25,7 @@ LL |     type B;
    |     ------ `B` defined here
 ...
 LL |     let d = &42isize as &dyn Foo;
-   |                              ^^^ help: specify the associated types: `Foo<A = Type, B = Type>`
+   |                              ^^^ help: specify the associated types: `Foo::<A = Type, B = Type>`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/associated-types/issue-22560.stderr b/tests/ui/associated-types/issue-22560.stderr
index 46e6e3951a5bd..8911fe8ee6e83 100644
--- a/tests/ui/associated-types/issue-22560.stderr
+++ b/tests/ui/associated-types/issue-22560.stderr
@@ -25,8 +25,8 @@ LL | type Test = dyn Add + Sub;
    |
 help: specify the associated types
    |
-LL | type Test = dyn Add<Output = Type> + Sub<Output = Type>;
-   |                 ~~~~~~~~~~~~~~~~~~   ~~~~~~~~~~~~~~~~~~
+LL | type Test = dyn Add::<Output = Type> + Sub::<Output = Type>;
+   |                 ~~~~~~~~~~~~~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~
 
 error[E0393]: the type parameter `Rhs` must be explicitly specified
   --> $DIR/issue-22560.rs:9:17
diff --git a/tests/ui/associated-types/issue-23595-1.stderr b/tests/ui/associated-types/issue-23595-1.stderr
index 694b68ef0901a..1d6f6a284920d 100644
--- a/tests/ui/associated-types/issue-23595-1.stderr
+++ b/tests/ui/associated-types/issue-23595-1.stderr
@@ -6,7 +6,7 @@ LL |     type Value;
 LL |     type ChildKey;
    |     ------------- `ChildKey` defined here
 LL |     type Children = dyn Index<Self::ChildKey, Output = dyn Hierarchy>;
-   |     ------------- `Children` defined here                  ^^^^^^^^^ help: specify the associated types: `Hierarchy<Value = Type, ChildKey = Type, Children = Type>`
+   |     ------------- `Children` defined here                  ^^^^^^^^^ help: specify the associated types: `Hierarchy::<Value = Type, ChildKey = Type, Children = Type>`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/error-codes/E0191.stderr b/tests/ui/error-codes/E0191.stderr
index 63974fd6cbbbd..a2646a1d20041 100644
--- a/tests/ui/error-codes/E0191.stderr
+++ b/tests/ui/error-codes/E0191.stderr
@@ -5,7 +5,7 @@ LL |     type Bar;
    |     -------- `Bar` defined here
 ...
 LL | type Foo = dyn Trait;
-   |                ^^^^^ help: specify the associated type: `Trait<Bar = Type>`
+   |                ^^^^^ help: specify the associated type: `Trait::<Bar = Type>`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/impl-trait/associated-type-cycle.stderr b/tests/ui/impl-trait/associated-type-cycle.stderr
index 7eef8d1e33893..fb057647bd067 100644
--- a/tests/ui/impl-trait/associated-type-cycle.stderr
+++ b/tests/ui/impl-trait/associated-type-cycle.stderr
@@ -5,7 +5,7 @@ LL |     type Bar;
    |     -------- `Bar` defined here
 ...
 LL | impl Foo for Box<dyn Foo> {
-   |                      ^^^ help: specify the associated type: `Foo<Bar = Type>`
+   |                      ^^^ help: specify the associated type: `Foo::<Bar = Type>`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-19482.stderr b/tests/ui/issues/issue-19482.stderr
index 903a9f98c7588..50a886f7ad96a 100644
--- a/tests/ui/issues/issue-19482.stderr
+++ b/tests/ui/issues/issue-19482.stderr
@@ -5,7 +5,7 @@ LL |     type A;
    |     ------ `A` defined here
 ...
 LL | fn bar(x: &dyn Foo) {}
-   |                ^^^ help: specify the associated type: `Foo<A = Type>`
+   |                ^^^ help: specify the associated type: `Foo::<A = Type>`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-21950.stderr b/tests/ui/issues/issue-21950.stderr
index e498565d4e653..fa29a41d2ba17 100644
--- a/tests/ui/issues/issue-21950.stderr
+++ b/tests/ui/issues/issue-21950.stderr
@@ -5,7 +5,7 @@ LL |     type Output;
    |     ----------- `Output` defined here
 ...
 LL |     let x = &10 as &dyn Add;
-   |                         ^^^ help: specify the associated type: `Add<Output = Type>`
+   |                         ^^^ help: specify the associated type: `Add::<Output = Type>`
 
 error[E0393]: the type parameter `Rhs` must be explicitly specified
   --> $DIR/issue-21950.rs:10:25
diff --git a/tests/ui/issues/issue-22434.stderr b/tests/ui/issues/issue-22434.stderr
index 172ae386c3e4a..63b5ad65c4ba5 100644
--- a/tests/ui/issues/issue-22434.stderr
+++ b/tests/ui/issues/issue-22434.stderr
@@ -5,7 +5,7 @@ LL |     type A;
    |     ------ `A` defined here
 ...
 LL | type I<'a> = &'a (dyn Foo + 'a);
-   |                       ^^^ help: specify the associated type: `Foo<A = Type>`
+   |                       ^^^ help: specify the associated type: `Foo::<A = Type>`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-23024.stderr b/tests/ui/issues/issue-23024.stderr
index 1672622d8b723..62278a51be635 100644
--- a/tests/ui/issues/issue-23024.stderr
+++ b/tests/ui/issues/issue-23024.stderr
@@ -23,7 +23,7 @@ error[E0191]: the value of the associated type `Output` in `FnOnce` must be spec
   --> $DIR/issue-23024.rs:8:39
    |
 LL |     println!("{:?}",(vfnfer[0] as dyn Fn)(3));
-   |                                       ^^ help: specify the associated type: `Fn<Output = Type>`
+   |                                       ^^ help: specify the associated type: `Fn::<Output = Type>`
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/issues/issue-28344.stderr b/tests/ui/issues/issue-28344.stderr
index d30fb3cfe58ab..b7e0790f67964 100644
--- a/tests/ui/issues/issue-28344.stderr
+++ b/tests/ui/issues/issue-28344.stderr
@@ -16,7 +16,7 @@ error[E0191]: the value of the associated type `Output` in `BitXor` must be spec
   --> $DIR/issue-28344.rs:4:17
    |
 LL |     let x: u8 = BitXor::bitor(0 as u8, 0 as u8);
-   |                 ^^^^^^ help: specify the associated type: `BitXor<Output = Type>`
+   |                 ^^^^^^ help: specify the associated type: `BitXor::<Output = Type>`
 
 error[E0599]: no function or associated item named `bitor` found for trait object `dyn BitXor<_>` in the current scope
   --> $DIR/issue-28344.rs:4:25
@@ -44,7 +44,7 @@ error[E0191]: the value of the associated type `Output` in `BitXor` must be spec
   --> $DIR/issue-28344.rs:10:13
    |
 LL |     let g = BitXor::bitor;
-   |             ^^^^^^ help: specify the associated type: `BitXor<Output = Type>`
+   |             ^^^^^^ help: specify the associated type: `BitXor::<Output = Type>`
 
 error[E0599]: no function or associated item named `bitor` found for trait object `dyn BitXor<_>` in the current scope
   --> $DIR/issue-28344.rs:10:21
diff --git a/tests/ui/object-safety/assoc_type_bounds_sized_others.stderr b/tests/ui/object-safety/assoc_type_bounds_sized_others.stderr
index 5438faaaf0546..384f1224e6488 100644
--- a/tests/ui/object-safety/assoc_type_bounds_sized_others.stderr
+++ b/tests/ui/object-safety/assoc_type_bounds_sized_others.stderr
@@ -5,7 +5,7 @@ LL |     type Bop;
    |     -------- `Bop` defined here
 ...
 LL | fn foo(_: &dyn Foo) {}
-   |                ^^^ help: specify the associated type: `Foo<Bop = Type>`
+   |                ^^^ help: specify the associated type: `Foo::<Bop = Type>`
 
 error[E0191]: the value of the associated type `Bop` in `Bar` must be specified
   --> $DIR/assoc_type_bounds_sized_others.rs:22:16
@@ -14,7 +14,7 @@ LL |     type Bop;
    |     -------- `Bop` defined here
 ...
 LL | fn bar(_: &dyn Bar) {}
-   |                ^^^ help: specify the associated type: `Bar<Bop = Type>`
+   |                ^^^ help: specify the associated type: `Bar::<Bop = Type>`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/suggestions/trait-hidden-method.stderr b/tests/ui/suggestions/trait-hidden-method.stderr
index 5dec20718467c..97fff64cac3fb 100644
--- a/tests/ui/suggestions/trait-hidden-method.stderr
+++ b/tests/ui/suggestions/trait-hidden-method.stderr
@@ -2,7 +2,7 @@ error[E0191]: the value of the associated type `Item` in `Iterator` must be spec
   --> $DIR/trait-hidden-method.rs:6:33
    |
 LL |     Box::new(1..=10) as Box<dyn Iterator>
-   |                                 ^^^^^^^^ help: specify the associated type: `Iterator<Item = Type>`
+   |                                 ^^^^^^^^ help: specify the associated type: `Iterator::<Item = Type>`
 
 error[E0271]: expected `Box<dyn Iterator>` to be an iterator that yields `u32`, but it yields `<dyn Iterator as Iterator>::Item`
   --> $DIR/trait-hidden-method.rs:3:32
diff --git a/tests/ui/traits/alias/object-fail.stderr b/tests/ui/traits/alias/object-fail.stderr
index a27a3ea0ec03e..ab3c93b09f01c 100644
--- a/tests/ui/traits/alias/object-fail.stderr
+++ b/tests/ui/traits/alias/object-fail.stderr
@@ -13,7 +13,7 @@ error[E0191]: the value of the associated type `Item` in `Iterator` must be spec
   --> $DIR/object-fail.rs:9:17
    |
 LL |     let _: &dyn IteratorAlias = &vec![123].into_iter();
-   |                 ^^^^^^^^^^^^^ help: specify the associated type: `IteratorAlias<Item = Type>`
+   |                 ^^^^^^^^^^^^^ help: specify the associated type: `IteratorAlias::<Item = Type>`
 
 error: aborting due to 2 previous errors