diff --git a/tests/ui/crashes/ice-4775.rs b/tests/ui/crashes/ice-4775.rs
index 31e53e846d5..405e3039e7d 100644
--- a/tests/ui/crashes/ice-4775.rs
+++ b/tests/ui/crashes/ice-4775.rs
@@ -1,6 +1,3 @@
-#![feature(const_generics)]
-#![allow(incomplete_features)]
-
 pub struct ArrayWrapper<const N: usize>([usize; N]);
 
 impl<const N: usize> ArrayWrapper<{ N }> {
diff --git a/tests/ui/crashes/ice-5223.rs b/tests/ui/crashes/ice-5223.rs
index 9bb2e227fc1..e3b3b27a6fc 100644
--- a/tests/ui/crashes/ice-5223.rs
+++ b/tests/ui/crashes/ice-5223.rs
@@ -1,7 +1,4 @@
 // Regression test for #5233
-
-#![feature(const_generics)]
-#![allow(incomplete_features)]
 #![warn(clippy::indexing_slicing, clippy::iter_cloned_collect)]
 
 pub struct KotomineArray<T, const N: usize> {
diff --git a/tests/ui/doc/doc.rs b/tests/ui/doc/doc.rs
index 8b20997fdf8..8b0c0f304fc 100644
--- a/tests/ui/doc/doc.rs
+++ b/tests/ui/doc/doc.rs
@@ -2,7 +2,7 @@
 
 #![allow(dead_code, incomplete_features)]
 #![warn(clippy::doc_markdown)]
-#![feature(custom_inner_attributes, const_generics, generic_const_exprs, const_option)]
+#![feature(custom_inner_attributes, generic_const_exprs, const_option)]
 #![rustfmt::skip]
 
 /// The foo_bar function does _nothing_. See also foo::bar. (note the dot there)
diff --git a/tests/ui/missing_const_for_fn/cant_be_const.rs b/tests/ui/missing_const_for_fn/cant_be_const.rs
index 6d2cbb6ad96..aa60d0504e5 100644
--- a/tests/ui/missing_const_for_fn/cant_be_const.rs
+++ b/tests/ui/missing_const_for_fn/cant_be_const.rs
@@ -5,8 +5,7 @@
 // aux-build:helper.rs
 
 #![warn(clippy::missing_const_for_fn)]
-#![allow(incomplete_features)]
-#![feature(start, const_generics)]
+#![feature(start)]
 #![feature(custom_inner_attributes)]
 
 extern crate helper;
diff --git a/tests/ui/missing_const_for_fn/could_be_const.rs b/tests/ui/missing_const_for_fn/could_be_const.rs
index 0accb516f5f..baa7eec0546 100644
--- a/tests/ui/missing_const_for_fn/could_be_const.rs
+++ b/tests/ui/missing_const_for_fn/could_be_const.rs
@@ -1,6 +1,5 @@
 #![warn(clippy::missing_const_for_fn)]
 #![allow(incomplete_features, clippy::let_and_return)]
-#![feature(const_generics)]
 #![feature(custom_inner_attributes)]
 
 use std::mem::transmute;
diff --git a/tests/ui/missing_const_for_fn/could_be_const.stderr b/tests/ui/missing_const_for_fn/could_be_const.stderr
index 63c211f39fa..b89cc6451bb 100644
--- a/tests/ui/missing_const_for_fn/could_be_const.stderr
+++ b/tests/ui/missing_const_for_fn/could_be_const.stderr
@@ -1,5 +1,5 @@
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:14:5
+  --> $DIR/could_be_const.rs:13:5
    |
 LL | /     pub fn new() -> Self {
 LL | |         Self { guess: 42 }
@@ -9,7 +9,7 @@ LL | |     }
    = note: `-D clippy::missing-const-for-fn` implied by `-D warnings`
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:18:5
+  --> $DIR/could_be_const.rs:17:5
    |
 LL | /     fn const_generic_params<'a, T, const N: usize>(&self, b: &'a [T; N]) -> &'a [T; N] {
 LL | |         b
@@ -17,7 +17,7 @@ LL | |     }
    | |_____^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:24:1
+  --> $DIR/could_be_const.rs:23:1
    |
 LL | / fn one() -> i32 {
 LL | |     1
@@ -25,7 +25,7 @@ LL | | }
    | |_^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:29:1
+  --> $DIR/could_be_const.rs:28:1
    |
 LL | / fn two() -> i32 {
 LL | |     let abc = 2;
@@ -34,7 +34,7 @@ LL | | }
    | |_^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:35:1
+  --> $DIR/could_be_const.rs:34:1
    |
 LL | / fn string() -> String {
 LL | |     String::new()
@@ -42,7 +42,7 @@ LL | | }
    | |_^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:40:1
+  --> $DIR/could_be_const.rs:39:1
    |
 LL | / unsafe fn four() -> i32 {
 LL | |     4
@@ -50,7 +50,7 @@ LL | | }
    | |_^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:45:1
+  --> $DIR/could_be_const.rs:44:1
    |
 LL | / fn generic<T>(t: T) -> T {
 LL | |     t
@@ -58,7 +58,7 @@ LL | | }
    | |_^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:68:9
+  --> $DIR/could_be_const.rs:67:9
    |
 LL | /         pub fn b(self, a: &A) -> B {
 LL | |             B
@@ -66,7 +66,7 @@ LL | |         }
    | |_________^
 
 error: this could be a `const fn`
-  --> $DIR/could_be_const.rs:78:5
+  --> $DIR/could_be_const.rs:77:5
    |
 LL | /     fn const_fn_stabilized_before_msrv(byte: u8) {
 LL | |         byte.is_ascii_digit();