diff --git a/compiler/rustc_builtin_macros/src/format.rs b/compiler/rustc_builtin_macros/src/format.rs
index 63bc0d552c1..b2b7b9d75bd 100644
--- a/compiler/rustc_builtin_macros/src/format.rs
+++ b/compiler/rustc_builtin_macros/src/format.rs
@@ -638,7 +638,7 @@ macro_rules! check_foreign {
                 if show_doc_note {
                     diag.note(concat!(
                         stringify!($kind),
-                        " formatting not supported; see the documentation for `std::fmt`",
+                        " formatting is not supported; see the documentation for `std::fmt`",
                     ));
                 }
                 if suggestions.len() > 0 {
diff --git a/src/test/ui/fmt/ifmt-bad-arg.stderr b/src/test/ui/fmt/ifmt-bad-arg.stderr
index a8a2a47fe46..c2619d6df58 100644
--- a/src/test/ui/fmt/ifmt-bad-arg.stderr
+++ b/src/test/ui/fmt/ifmt-bad-arg.stderr
@@ -170,7 +170,7 @@ LL |     format!("foo %s baz", "bar");
    |                  |
    |                  help: format specifiers use curly braces: `{}`
    |
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: invalid format string: expected `'}'`, found `'t'`
   --> $DIR/ifmt-bad-arg.rs:75:1
diff --git a/src/test/ui/fmt/issue-89173.rs b/src/test/ui/fmt/issue-89173.rs
index 96277d4d0d9..fc99af40859 100644
--- a/src/test/ui/fmt/issue-89173.rs
+++ b/src/test/ui/fmt/issue-89173.rs
@@ -10,5 +10,5 @@ fn main() {
     //~| NOTE: argument never used
     //~| NOTE: argument never used
     //~| NOTE: format specifiers use curly braces, and you have to use a positional or named parameter for the width
-    //~| NOTE: printf formatting not supported
+    //~| NOTE: printf formatting is not supported
 }
diff --git a/src/test/ui/fmt/issue-89173.stderr b/src/test/ui/fmt/issue-89173.stderr
index 7b21e0a4fc8..ddeb769eadc 100644
--- a/src/test/ui/fmt/issue-89173.stderr
+++ b/src/test/ui/fmt/issue-89173.stderr
@@ -12,7 +12,7 @@ note: format specifiers use curly braces, and you have to use a positional or na
    |
 LL |     print!("%0*x", width, num);
    |             ^^^^
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/macros/format-foreign.stderr b/src/test/ui/macros/format-foreign.stderr
index ff5236dc949..7971c2ab2b9 100644
--- a/src/test/ui/macros/format-foreign.stderr
+++ b/src/test/ui/macros/format-foreign.stderr
@@ -8,7 +8,7 @@ LL |     println!("%.*3$s %s!\n", "Hello,", "World", 4);
    |              |               argument never used
    |              multiple missing formatting specifiers
    |
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 help: format specifiers use curly braces
    |
 LL |     println!("{:.2$} {}!\n", "Hello,", "World", 4);
@@ -22,7 +22,7 @@ LL |     println!("%1$*2$.*3$f", 123.456);
    |               |
    |               help: format specifiers use curly braces: `{0:1$.2$}`
    |
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: multiple unused formatting arguments
   --> $DIR/format-foreign.rs:6:7
@@ -37,7 +37,7 @@ LL | | "###, "Hello,", "World", 4);
    | |____|  argument never used
    |      multiple missing formatting specifiers
    |
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 help: format specifiers use curly braces
    |
 LL ~     println!(r###"{:.2$}
@@ -60,7 +60,7 @@ LL |     println!("Hi there, $NAME.", NAME="Tim");
    |                         |
    |                         help: format specifiers use curly braces: `{NAME}`
    |
-   = note: shell formatting not supported; see the documentation for `std::fmt`
+   = note: shell formatting is not supported; see the documentation for `std::fmt`
 
 error: multiple unused formatting arguments
   --> $DIR/format-foreign.rs:15:32
@@ -72,7 +72,7 @@ LL |     println!("$1 $0 $$ $NAME", 1, 2, NAME=3);
    |              |                 argument never used
    |              multiple missing formatting specifiers
    |
-   = note: shell formatting not supported; see the documentation for `std::fmt`
+   = note: shell formatting is not supported; see the documentation for `std::fmt`
 help: format specifiers use curly braces
    |
 LL |     println!("{1} {0} $$ {NAME}", 1, 2, NAME=3);
diff --git a/src/test/ui/macros/format-unused-lables.stderr b/src/test/ui/macros/format-unused-lables.stderr
index 7423c7b7c8b..fad87fa2aee 100644
--- a/src/test/ui/macros/format-unused-lables.stderr
+++ b/src/test/ui/macros/format-unused-lables.stderr
@@ -44,7 +44,7 @@ LL |        "things"
 LL |              , UNUSED="args");
    |                       ^^^^^^ named argument never used
    |
-   = note: shell formatting not supported; see the documentation for `std::fmt`
+   = note: shell formatting is not supported; see the documentation for `std::fmt`
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/macros/issue-92267.stderr b/src/test/ui/macros/issue-92267.stderr
index d2d66c81198..5359f68cd55 100644
--- a/src/test/ui/macros/issue-92267.stderr
+++ b/src/test/ui/macros/issue-92267.stderr
@@ -10,7 +10,7 @@ note: format specifiers use curly braces, and the conversion specifier `
    |
 LL | pub fn main() { println!("🦀%%%", 0) }
    |                               ^^
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: aborting due to previous error