diff --git a/tests/ui/literals.rs b/tests/ui/literals.rs
index 4b5188af3fdc..5f3f95bab980 100644
--- a/tests/ui/literals.rs
+++ b/tests/ui/literals.rs
@@ -39,21 +39,7 @@ fn main() {
 
     let fail13 = 0x1_23456_78901_usize;
 
-    let fail14 = 2_32;
-    let fail15 = 4_64;
-    let fail16 = 7_8;
-    let fail17 = 23_16;
-    let ok18 = 23_128;
     let fail19 = 12_3456_21;
-    let fail20 = 2__8;
-    let fail21 = 4___16;
     let fail22 = 3__4___23;
     let fail23 = 3__16___23;
-
-    let fail24 = 12.34_64;
-    let fail25 = 1E2_32;
-    let fail26 = 43E7_64;
-    let fail27 = 243E17_32;
-    let fail28 = 241251235E723_64;
-    let fail29 = 42279.911_32;
 }
diff --git a/tests/ui/literals.stderr b/tests/ui/literals.stderr
index 1c26bf03cdee..22692160d73a 100644
--- a/tests/ui/literals.stderr
+++ b/tests/ui/literals.stderr
@@ -94,99 +94,25 @@ LL |     let fail13 = 0x1_23456_78901_usize;
    |
    = note: `-D clippy::large-digit-groups` implied by `-D warnings`
 
-error: mistyped literal suffix
-  --> $DIR/literals.rs:42:18
-   |
-LL |     let fail14 = 2_32;
-   |                  ^^^^ help: did you mean to write: `2_i32`
-   |
-   = note: #[deny(clippy::mistyped_literal_suffixes)] on by default
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:43:18
-   |
-LL |     let fail15 = 4_64;
-   |                  ^^^^ help: did you mean to write: `4_i64`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:44:18
-   |
-LL |     let fail16 = 7_8;
-   |                  ^^^ help: did you mean to write: `7_i8`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:45:18
-   |
-LL |     let fail17 = 23_16;
-   |                  ^^^^^ help: did you mean to write: `23_i16`
-
 error: digits grouped inconsistently by underscores
-  --> $DIR/literals.rs:47:18
+  --> $DIR/literals.rs:42:18
    |
 LL |     let fail19 = 12_3456_21;
    |                  ^^^^^^^^^^ help: consider: `12_345_621`
    |
    = note: `-D clippy::inconsistent-digit-grouping` implied by `-D warnings`
 
-error: mistyped literal suffix
-  --> $DIR/literals.rs:48:18
-   |
-LL |     let fail20 = 2__8;
-   |                  ^^^^ help: did you mean to write: `2_i8`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:49:18
-   |
-LL |     let fail21 = 4___16;
-   |                  ^^^^^^ help: did you mean to write: `4_i16`
-
 error: digits grouped inconsistently by underscores
-  --> $DIR/literals.rs:50:18
+  --> $DIR/literals.rs:43:18
    |
 LL |     let fail22 = 3__4___23;
    |                  ^^^^^^^^^ help: consider: `3_423`
 
 error: digits grouped inconsistently by underscores
-  --> $DIR/literals.rs:51:18
+  --> $DIR/literals.rs:44:18
    |
 LL |     let fail23 = 3__16___23;
    |                  ^^^^^^^^^^ help: consider: `31_623`
 
-error: mistyped literal suffix
-  --> $DIR/literals.rs:53:18
-   |
-LL |     let fail24 = 12.34_64;
-   |                  ^^^^^^^^ help: did you mean to write: `12.34_f64`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:54:18
-   |
-LL |     let fail25 = 1E2_32;
-   |                  ^^^^^^ help: did you mean to write: `1E2_f32`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:55:18
-   |
-LL |     let fail26 = 43E7_64;
-   |                  ^^^^^^^ help: did you mean to write: `43E7_f64`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:56:18
-   |
-LL |     let fail27 = 243E17_32;
-   |                  ^^^^^^^^^ help: did you mean to write: `243E17_f32`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:57:18
-   |
-LL |     let fail28 = 241251235E723_64;
-   |                  ^^^^^^^^^^^^^^^^ help: did you mean to write: `241_251_235E723_f64`
-
-error: mistyped literal suffix
-  --> $DIR/literals.rs:58:18
-   |
-LL |     let fail29 = 42279.911_32;
-   |                  ^^^^^^^^^^^^ help: did you mean to write: `42_279.911_f32`
-
-error: aborting due to 27 previous errors
+error: aborting due to 15 previous errors
 
diff --git a/tests/ui/mistyped_literal_suffix.fixed b/tests/ui/mistyped_literal_suffix.fixed
new file mode 100644
index 000000000000..7d948d31c8a0
--- /dev/null
+++ b/tests/ui/mistyped_literal_suffix.fixed
@@ -0,0 +1,23 @@
+// run-rustfix
+
+#![allow(dead_code, unused_variables, clippy::excessive_precision)]
+
+
+fn main() {
+    let fail14 = 2_i32;
+    let fail15 = 4_i64;
+    let fail16 = 7_i8; //
+    let fail17 = 23_i16; //
+    let ok18 = 23_128;
+
+    let fail20 = 2_i8; //
+    let fail21 = 4_i16; //
+
+    let fail24 = 12.34_f64;
+    let fail25 = 1E2_f32;
+    let fail26 = 43E7_f64;
+    let fail27 = 243E17_f32;
+    #[allow(overflowing_literals)]
+    let fail28 = 241_251_235E723_f64;
+    let fail29 = 42_279.911_f32;
+}
diff --git a/tests/ui/mistyped_literal_suffix.rs b/tests/ui/mistyped_literal_suffix.rs
new file mode 100644
index 000000000000..779a7bcdaba8
--- /dev/null
+++ b/tests/ui/mistyped_literal_suffix.rs
@@ -0,0 +1,23 @@
+// run-rustfix
+
+#![allow(dead_code, unused_variables, clippy::excessive_precision)]
+
+
+fn main() {
+    let fail14 = 2_32;
+    let fail15 = 4_64;
+    let fail16 = 7_8; //
+    let fail17 = 23_16; //
+    let ok18 = 23_128;
+
+    let fail20 = 2__8; //
+    let fail21 = 4___16; //
+
+    let fail24 = 12.34_64;
+    let fail25 = 1E2_32;
+    let fail26 = 43E7_64;
+    let fail27 = 243E17_32;
+    #[allow(overflowing_literals)]
+    let fail28 = 241251235E723_64;
+    let fail29 = 42279.911_32;
+}
diff --git a/tests/ui/mistyped_literal_suffix.stderr b/tests/ui/mistyped_literal_suffix.stderr
new file mode 100644
index 000000000000..ad99bb106d47
--- /dev/null
+++ b/tests/ui/mistyped_literal_suffix.stderr
@@ -0,0 +1,76 @@
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:7:18
+   |
+LL |     let fail14 = 2_32;
+   |                  ^^^^ help: did you mean to write: `2_i32`
+   |
+   = note: #[deny(clippy::mistyped_literal_suffixes)] on by default
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:8:18
+   |
+LL |     let fail15 = 4_64;
+   |                  ^^^^ help: did you mean to write: `4_i64`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:9:18
+   |
+LL |     let fail16 = 7_8; //
+   |                  ^^^ help: did you mean to write: `7_i8`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:10:18
+   |
+LL |     let fail17 = 23_16; //
+   |                  ^^^^^ help: did you mean to write: `23_i16`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:13:18
+   |
+LL |     let fail20 = 2__8; //
+   |                  ^^^^ help: did you mean to write: `2_i8`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:14:18
+   |
+LL |     let fail21 = 4___16; //
+   |                  ^^^^^^ help: did you mean to write: `4_i16`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:16:18
+   |
+LL |     let fail24 = 12.34_64;
+   |                  ^^^^^^^^ help: did you mean to write: `12.34_f64`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:17:18
+   |
+LL |     let fail25 = 1E2_32;
+   |                  ^^^^^^ help: did you mean to write: `1E2_f32`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:18:18
+   |
+LL |     let fail26 = 43E7_64;
+   |                  ^^^^^^^ help: did you mean to write: `43E7_f64`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:19:18
+   |
+LL |     let fail27 = 243E17_32;
+   |                  ^^^^^^^^^ help: did you mean to write: `243E17_f32`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:21:18
+   |
+LL |     let fail28 = 241251235E723_64;
+   |                  ^^^^^^^^^^^^^^^^ help: did you mean to write: `241_251_235E723_f64`
+
+error: mistyped literal suffix
+  --> $DIR/mistyped_literal_suffix.rs:22:18
+   |
+LL |     let fail29 = 42279.911_32;
+   |                  ^^^^^^^^^^^^ help: did you mean to write: `42_279.911_f32`
+
+error: aborting due to 12 previous errors
+