diff --git a/tests/ui/parser/attribute/attr-unquoted-ident.rs b/tests/ui/parser/attribute/attr-unquoted-ident.rs
index 152448bf8a0f..6207662a6e19 100644
--- a/tests/ui/parser/attribute/attr-unquoted-ident.rs
+++ b/tests/ui/parser/attribute/attr-unquoted-ident.rs
@@ -26,7 +26,10 @@ fn main() {
 
 macro_rules! make {
     ($name:ident) => { #[doc(alias = $name)] pub struct S; }
-    //~^ ERROR: expected unsuffixed literal, found identifier `nickname`
+    //~^ ERROR: expected a literal (`1u8`, `1.0f32`, `"string"`, etc.) here, found expression
+    //~| NOTE: expressions are not allowed here
+    //~| HELP: surround the identifier with quotation marks to make it into a string literal
 }
 
 make!(nickname); //~ NOTE: in this expansion
+//~^ NOTE in this expansion of make
diff --git a/tests/ui/parser/attribute/attr-unquoted-ident.stderr b/tests/ui/parser/attribute/attr-unquoted-ident.stderr
index 00fb539f8a86..48ca499ba78f 100644
--- a/tests/ui/parser/attribute/attr-unquoted-ident.stderr
+++ b/tests/ui/parser/attribute/attr-unquoted-ident.stderr
@@ -20,14 +20,31 @@ help: surround the identifier with quotation marks to make it into a string lite
 LL |     #[cfg(key="foo bar baz")]
    |               +           +
 
+error: expected a literal (`1u8`, `1.0f32`, `"string"`, etc.) here, found expression
+  --> $DIR/attr-unquoted-ident.rs:18:15
+   |
+LL |     #[cfg(key=foo 1 bar 2.0 baz.)]
+   |               ^^^ expressions are not allowed here
+   |
+help: surround the identifier with quotation marks to make it into a string literal
+   |
+LL |     #[cfg(key="foo 1 bar 2.0 baz.")]
+   |               +                  +
+
+error: expected a literal (`1u8`, `1.0f32`, `"string"`, etc.) here, found expression
+  --> $DIR/attr-unquoted-ident.rs:28:38
    |
 LL |     ($name:ident) => { #[doc(alias = $name)] pub struct S; }
-   |                                      ^^^^^
+   |                                      ^^^^^ expressions are not allowed here
 ...
 LL | make!(nickname);
    | --------------- in this macro invocation
    |
    = note: this error originates in the macro `make` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: surround the identifier with quotation marks to make it into a string literal
+   |
+LL |     ($name:ident) => { #[doc(alias = "$name")] pub struct S; }
+   |                                      +     +
 
 error: aborting due to 4 previous errors