diff --git a/clippy_lints/src/utils/attrs.rs b/clippy_lints/src/utils/attrs.rs
index 234ae37612b..a3975683cb3 100644
--- a/clippy_lints/src/utils/attrs.rs
+++ b/clippy_lints/src/utils/attrs.rs
@@ -80,7 +80,7 @@ pub fn get_attr<'a>(
                     },
                     |deprecation_status| {
                         let mut diag =
-                            sess.struct_span_err(attr_segments[1].ident.span, "Usage of deprecated attribute");
+                            sess.struct_span_err(attr_segments[1].ident.span, "usage of deprecated attribute");
                         match *deprecation_status {
                             DeprecationStatus::Deprecated => {
                                 diag.emit();
diff --git a/tests/ui/renamed_builtin_attr.stderr b/tests/ui/renamed_builtin_attr.stderr
index a399ff52fb8..88046762483 100644
--- a/tests/ui/renamed_builtin_attr.stderr
+++ b/tests/ui/renamed_builtin_attr.stderr
@@ -1,4 +1,4 @@
-error: Usage of deprecated attribute
+error: usage of deprecated attribute
   --> $DIR/renamed_builtin_attr.rs:3:11
    |
 LL | #[clippy::cyclomatic_complexity = "1"]