diff --git a/tests/ui/missing_colon.stderr b/tests/ui/missing_colon.stderr
index 3cebc4fd3..1515211ad 100644
--- a/tests/ui/missing_colon.stderr
+++ b/tests/ui/missing_colon.stderr
@@ -4,4 +4,9 @@ error: unexpected end of macro invocation
 4 |     json!({ "a" });
   |     ^^^^^^^^^^^^^^ missing tokens in macro arguments
   |
+note: while trying to match `@`
+ --> src/macros.rs
+  |
+  |     (@array [$($elems:expr,)*]) => {
+  |      ^
   = note: this error originates in the macro `json_internal` which comes from the expansion of the macro `json` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/tests/ui/missing_comma.stderr b/tests/ui/missing_comma.stderr
index bd911d035..bafa0f891 100644
--- a/tests/ui/missing_comma.stderr
+++ b/tests/ui/missing_comma.stderr
@@ -5,3 +5,9 @@ error: no rules expected the token `"2"`
   |                    -^^^ no rules expected this token in macro call
   |                    |
   |                    help: missing comma here
+  |
+note: while trying to match `,`
+ --> src/macros.rs
+  |
+  |     ($e:expr , $($tt:tt)*) => {};
+  |              ^
diff --git a/tests/ui/missing_value.stderr b/tests/ui/missing_value.stderr
index a1edbc37b..9c9de99ca 100644
--- a/tests/ui/missing_value.stderr
+++ b/tests/ui/missing_value.stderr
@@ -4,4 +4,9 @@ error: unexpected end of macro invocation
 4 |     json!({ "a" : });
   |     ^^^^^^^^^^^^^^^^ missing tokens in macro arguments
   |
+note: while trying to match `@`
+ --> src/macros.rs
+  |
+  |     (@array [$($elems:expr,)*]) => {
+  |      ^
   = note: this error originates in the macro `json_internal` which comes from the expansion of the macro `json` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/tests/ui/parse_expr.stderr b/tests/ui/parse_expr.stderr
index 6959673d9..cd3e1c94d 100644
--- a/tests/ui/parse_expr.stderr
+++ b/tests/ui/parse_expr.stderr
@@ -3,3 +3,9 @@ error: no rules expected the token `~`
   |
 4 |     json!({ "a" : ~ });
   |                   ^ no rules expected this token in macro call
+  |
+note: while trying to match meta-variable `$e:expr`
+ --> src/macros.rs
+  |
+  |     ($e:expr , $($tt:tt)*) => {};
+  |      ^^^^^^^
diff --git a/tests/ui/unexpected_after_array_element.stderr b/tests/ui/unexpected_after_array_element.stderr
index f745a212d..ef449f764 100644
--- a/tests/ui/unexpected_after_array_element.stderr
+++ b/tests/ui/unexpected_after_array_element.stderr
@@ -3,3 +3,5 @@ error: no rules expected the token `=>`
   |
 4 |     json!([ true => ]);
   |                  ^^ no rules expected this token in macro call
+  |
+  = note: while trying to match end of macro
diff --git a/tests/ui/unexpected_after_map_entry.stderr b/tests/ui/unexpected_after_map_entry.stderr
index a18c9b4cd..c62d90ba0 100644
--- a/tests/ui/unexpected_after_map_entry.stderr
+++ b/tests/ui/unexpected_after_map_entry.stderr
@@ -3,3 +3,5 @@ error: no rules expected the token `=>`
   |
 4 |     json!({ "k": true => });
   |                       ^^ no rules expected this token in macro call
+  |
+  = note: while trying to match end of macro
diff --git a/tests/ui/unexpected_colon.stderr b/tests/ui/unexpected_colon.stderr
index ed038f608..7e47726bc 100644
--- a/tests/ui/unexpected_colon.stderr
+++ b/tests/ui/unexpected_colon.stderr
@@ -3,3 +3,5 @@ error: no rules expected the token `:`
   |
 4 |     json!({ : true });
   |             ^ no rules expected this token in macro call
+  |
+  = note: while trying to match end of macro
diff --git a/tests/ui/unexpected_comma.stderr b/tests/ui/unexpected_comma.stderr
index a4309c4e5..552f399a5 100644
--- a/tests/ui/unexpected_comma.stderr
+++ b/tests/ui/unexpected_comma.stderr
@@ -3,3 +3,5 @@ error: no rules expected the token `,`
   |
 4 |     json!({ "a" , "b": true });
   |                 ^ no rules expected this token in macro call
+  |
+  = note: while trying to match end of macro