diff --git a/src/test/ui/lint/use_suggestion_json.rs b/src/test/ui/lint/use_suggestion_json.rs
new file mode 100644
index 00000000000..20c24d64050
--- /dev/null
+++ b/src/test/ui/lint/use_suggestion_json.rs
@@ -0,0 +1,21 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: --error-format json
+
+// The output for humans should just highlight the whole span without showing
+// the suggested replacement, but we also want to test that suggested
+// replacement only removes one set of parentheses, rather than naïvely
+// stripping away any starting or ending parenthesis characters—hence this
+// test of the JSON error format.
+
+fn main() {
+    let x: Iter;
+}
diff --git a/src/test/ui/lint/use_suggestion_json.stderr b/src/test/ui/lint/use_suggestion_json.stderr
new file mode 100644
index 00000000000..6dd82ad1eb4
--- /dev/null
+++ b/src/test/ui/lint/use_suggestion_json.stderr
@@ -0,0 +1,2 @@
+{"message":"cannot find type `Iter` in this scope","code":{"code":"E0412","explanation":"/nThe type name used is not in scope./n/nErroneous code examples:/n/n```compile_fail,E0412/nimpl Something {} // error: type name `Something` is not in scope/n/n// or:/n/ntrait Foo {/n    fn bar(N); // error: type name `N` is not in scope/n}/n/n// or:/n/nfn foo(x: T) {} // type name `T` is not in scope/n```/n/nTo fix this error, please verify you didn't misspell the type name, you did/ndeclare it or imported it into the scope. Examples:/n/n```/nstruct Something;/n/nimpl Something {} // ok!/n/n// or:/n/ntrait Foo {/n    type N;/n/n    fn bar(_: Self::N); // ok!/n}/n/n// or:/n/nfn foo<T>(x: T) {} // ok!/n```/n/nAnother case that causes this error is when a type is imported into a parent/nmodule. To fix this, you can follow the suggestion and use File directly or/n`use super::File;` which will import the types from the parent namespace. An/nexample that causes this error is below:/n/n```compile_fail,E0412/nuse std::fs::File;/n/nmod foo {/n    fn some_function(f: File) {}/n}/n```/n/n```/nuse std::fs::File;/n/nmod foo {/n    // either/n    use super::File;/n    // or/n    // use std::fs::File;/n    fn foo(f: File) {}/n}/n# fn main() {} // don't insert it for us; that'll break imports/n```/n"},"level":"error","spans":[{"file_name":"$DIR/use_suggestion_json.rs","byte_start":862,"byte_end":866,"line_start":20,"line_end":20,"column_start":12,"column_end":16,"is_primary":true,"text":[{"text":"    let x: Iter;","highlight_start":12,"highlight_end":16}],"label":"not found in this scope","suggested_replacement":null,"expansion":null}],"children":[{"message":"possible candidates are found in other modules, you can import them into 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