diff --git a/tests/ui/absurd-extreme-comparisons.rs b/tests/ui/absurd-extreme-comparisons.rs
index ae0727fe2ba3..d205b383d1ff 100644
--- a/tests/ui/absurd-extreme-comparisons.rs
+++ b/tests/ui/absurd-extreme-comparisons.rs
@@ -16,17 +16,17 @@ fn main() {
     u < Z;
     Z >= u;
     Z > u;
-    u > std::u32::MAX;
-    u >= std::u32::MAX;
-    std::u32::MAX < u;
-    std::u32::MAX <= u;
+    u > u32::MAX;
+    u >= u32::MAX;
+    u32::MAX < u;
+    u32::MAX <= u;
     1-1 > u;
     u >= !0;
     u <= 12 - 2*6;
     let i: i8 = 0;
     i < -127 - 1;
-    std::i8::MAX >= i;
-    3-7 < std::i32::MIN;
+    i8::MAX >= i;
+    3-7 < i32::MIN;
     let b = false;
     b >= true;
     false > b;
@@ -52,10 +52,10 @@ impl PartialOrd<u32> for U {
 }
 
 pub fn foo(val: U) -> bool {
-    val > std::u32::MAX
+    val > u32::MAX
 }
 
 pub fn bar(len: u64) -> bool {
     // This is OK as we are casting from target sized to fixed size
-    len >= std::usize::MAX as u64
+    len >= usize::MAX as u64
 }
diff --git a/tests/ui/absurd-extreme-comparisons.stderr b/tests/ui/absurd-extreme-comparisons.stderr
index 4ef364148cda..6de554378aaa 100644
--- a/tests/ui/absurd-extreme-comparisons.stderr
+++ b/tests/ui/absurd-extreme-comparisons.stderr
@@ -42,34 +42,34 @@ LL |     Z > u;
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:19:5
    |
-LL |     u > std::u32::MAX;
-   |     ^^^^^^^^^^^^^^^^^
+LL |     u > u32::MAX;
+   |     ^^^^^^^^^^^^
    |
-   = help: because `std::u32::MAX` is the maximum value for this type, this comparison is always false
+   = help: because `u32::MAX` is the maximum value for this type, this comparison is always false
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:20:5
    |
-LL |     u >= std::u32::MAX;
-   |     ^^^^^^^^^^^^^^^^^^
+LL |     u >= u32::MAX;
+   |     ^^^^^^^^^^^^^
    |
-   = help: because `std::u32::MAX` is the maximum value for this type, the case where the two sides are not equal never occurs, consider using `u == std::u32::MAX` instead
+   = help: because `u32::MAX` is the maximum value for this type, the case where the two sides are not equal never occurs, consider using `u == u32::MAX` instead
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:21:5
    |
-LL |     std::u32::MAX < u;
-   |     ^^^^^^^^^^^^^^^^^
+LL |     u32::MAX < u;
+   |     ^^^^^^^^^^^^
    |
-   = help: because `std::u32::MAX` is the maximum value for this type, this comparison is always false
+   = help: because `u32::MAX` is the maximum value for this type, this comparison is always false
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:22:5
    |
-LL |     std::u32::MAX <= u;
-   |     ^^^^^^^^^^^^^^^^^^
+LL |     u32::MAX <= u;
+   |     ^^^^^^^^^^^^^
    |
-   = help: because `std::u32::MAX` is the maximum value for this type, the case where the two sides are not equal never occurs, consider using `std::u32::MAX == u` instead
+   = help: because `u32::MAX` is the maximum value for this type, the case where the two sides are not equal never occurs, consider using `u32::MAX == u` instead
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:23:5
@@ -106,18 +106,18 @@ LL |     i < -127 - 1;
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:28:5
    |
-LL |     std::i8::MAX >= i;
-   |     ^^^^^^^^^^^^^^^^^
+LL |     i8::MAX >= i;
+   |     ^^^^^^^^^^^^
    |
-   = help: because `std::i8::MAX` is the maximum value for this type, this comparison is always true
+   = help: because `i8::MAX` is the maximum value for this type, this comparison is always true
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:29:5
    |
-LL |     3-7 < std::i32::MIN;
-   |     ^^^^^^^^^^^^^^^^^^^
+LL |     3-7 < i32::MIN;
+   |     ^^^^^^^^^^^^^^
    |
-   = help: because `std::i32::MIN` is the minimum value for this type, this comparison is always false
+   = help: because `i32::MIN` is the minimum value for this type, this comparison is always false
 
 error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> $DIR/absurd-extreme-comparisons.rs:31:5
diff --git a/tests/ui/crashes/mut_mut_macro.rs b/tests/ui/crashes/mut_mut_macro.rs
index 14219f574c59..d8fbaa541466 100644
--- a/tests/ui/crashes/mut_mut_macro.rs
+++ b/tests/ui/crashes/mut_mut_macro.rs
@@ -16,7 +16,7 @@
 const BAA: *const i32 = 0 as *const i32;
 static mut BAR: *const i32 = BAA;
 static mut FOO: *const i32 = 0 as *const i32;
-static mut BUH: bool = 42.0 < std::f32::NAN;
+static mut BUH: bool = 42.0 < f32::NAN;
 
 #[allow(unused_variables, unused_mut)]
 fn main() {
@@ -32,5 +32,5 @@ fn main() {
     assert_eq!(*MUT_COUNT, 1);
     */
     // FIXME: don't lint in array length, requires `check_body`
-    //let _ = [""; (42.0 < std::f32::NAN) as usize];
+    //let _ = [""; (42.0 < f32::NAN) as usize];
 }
diff --git a/tests/ui/enum_clike_unportable_variant.rs b/tests/ui/enum_clike_unportable_variant.rs
index 7379ad99f4af..7d6842f5b542 100644
--- a/tests/ui/enum_clike_unportable_variant.rs
+++ b/tests/ui/enum_clike_unportable_variant.rs
@@ -24,8 +24,8 @@ enum NonPortableSigned {
     Y = 0x7FFF_FFFF,
     Z = 0xFFFF_FFFF,
     A = 0x1_0000_0000,
-    B = std::i32::MIN as isize,
-    C = (std::i32::MIN as isize) - 1,
+    B = i32::MIN as isize,
+    C = (i32::MIN as isize) - 1,
 }
 
 enum NonPortableSignedNoHint {
diff --git a/tests/ui/enum_clike_unportable_variant.stderr b/tests/ui/enum_clike_unportable_variant.stderr
index bd729683e4ce..71f3f5e083e0 100644
--- a/tests/ui/enum_clike_unportable_variant.stderr
+++ b/tests/ui/enum_clike_unportable_variant.stderr
@@ -33,8 +33,8 @@ LL |     A = 0x1_0000_0000,
 error: Clike enum variant discriminant is not portable to 32-bit targets
   --> $DIR/enum_clike_unportable_variant.rs:28:5
    |
-LL |     C = (std::i32::MIN as isize) - 1,
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |     C = (i32::MIN as isize) - 1,
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: Clike enum variant discriminant is not portable to 32-bit targets
   --> $DIR/enum_clike_unportable_variant.rs:34:5
diff --git a/tests/ui/float_cmp.rs b/tests/ui/float_cmp.rs
index 207c1bcbbc67..c8248723bc9d 100644
--- a/tests/ui/float_cmp.rs
+++ b/tests/ui/float_cmp.rs
@@ -45,8 +45,8 @@ impl PartialEq for X {
 
 fn main() {
     ZERO == 0f32; //no error, comparison with zero is ok
-    1.0f32 != ::std::f32::INFINITY; // also comparison with infinity
-    1.0f32 != ::std::f32::NEG_INFINITY; // and negative infinity
+    1.0f32 != f32::INFINITY; // also comparison with infinity
+    1.0f32 != f32::NEG_INFINITY; // and negative infinity
     ZERO == 0.0; //no error, comparison with zero is ok
     ZERO + ZERO != 1.0; //no error, comparison with zero is ok
 
diff --git a/tests/ui/float_cmp_const.rs b/tests/ui/float_cmp_const.rs
index 8f4ad15720b0..a338040e19be 100644
--- a/tests/ui/float_cmp_const.rs
+++ b/tests/ui/float_cmp_const.rs
@@ -37,8 +37,8 @@ fn main() {
     // no errors, zero and infinity values
     ONE != 0f32;
     TWO == 0f32;
-    ONE != ::std::f32::INFINITY;
-    ONE == ::std::f32::NEG_INFINITY;
+    ONE != f32::INFINITY;
+    ONE == f32::NEG_INFINITY;
 
     // no errors, but will warn clippy::float_cmp if '#![allow(float_cmp)]' above is removed
     let w = 1.1;
diff --git a/tests/ui/if_same_then_else.rs b/tests/ui/if_same_then_else.rs
index 67b4c311085e..6bbf79edfcf7 100644
--- a/tests/ui/if_same_then_else.rs
+++ b/tests/ui/if_same_then_else.rs
@@ -78,7 +78,7 @@ fn if_same_then_else() {
     let _ = if true { 0.0 } else { -0.0 };
 
     // Different NaNs
-    let _ = if true { 0.0 / 0.0 } else { std::f32::NAN };
+    let _ = if true { 0.0 / 0.0 } else { f32::NAN };
 
     if true {
         foo();
diff --git a/tests/ui/if_same_then_else2.rs b/tests/ui/if_same_then_else2.rs
index 8e61bf3830be..cbec56324dca 100644
--- a/tests/ui/if_same_then_else2.rs
+++ b/tests/ui/if_same_then_else2.rs
@@ -87,10 +87,10 @@ fn if_same_then_else2() -> Result<&'static str, ()> {
 
     // Same NaNs
     let _ = if true {
-        std::f32::NAN
+        f32::NAN
     } else {
         //~ ERROR same body as `if` block
-        std::f32::NAN
+        f32::NAN
     };
 
     if true {
diff --git a/tests/ui/if_same_then_else2.stderr b/tests/ui/if_same_then_else2.stderr
index c6da3c6be645..da2be6c8aa5a 100644
--- a/tests/ui/if_same_then_else2.stderr
+++ b/tests/ui/if_same_then_else2.stderr
@@ -69,7 +69,7 @@ error: this `if` has identical blocks
 LL |       } else {
    |  ____________^
 LL | |         //~ ERROR same body as `if` block
-LL | |         std::f32::NAN
+LL | |         f32::NAN
 LL | |     };
    | |_____^
    |
@@ -78,7 +78,7 @@ note: same as this
    |
 LL |       let _ = if true {
    |  _____________________^
-LL | |         std::f32::NAN
+LL | |         f32::NAN
 LL | |     } else {
    | |_____^