2 files changed, 5 insertions, 1 deletions
diff --git a/clippy_dev/src/lib.rs b/clippy_dev/src/lib.rs
index 1e5a140e964..69f42aca8b6 100644
--- a/clippy_dev/src/lib.rs
+++ b/clippy_dev/src/lib.rs
@@ -1,5 +1,7 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![feature(once_cell)]
+#![cfg_attr(feature = "deny-warnings", deny(warnings))]
+// warn on lints, that are included in `rust-lang/rust`s bootstrap
+#![warn(rust_2018_idioms, unused_lifetimes)]
 
 use itertools::Itertools;
 use regex::Regex;
diff --git a/clippy_dev/src/main.rs b/clippy_dev/src/main.rs
index f4da783502c..7040c257c83 100644
--- a/clippy_dev/src/main.rs
+++ b/clippy_dev/src/main.rs
@@ -1,4 +1,6 @@
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
+// warn on lints, that are included in `rust-lang/rust`s bootstrap
+#![warn(rust_2018_idioms, unused_lifetimes)]
 
 use clap::{App, Arg, ArgMatches, SubCommand};
 use clippy_dev::{bless, fmt, ide_setup, new_lint, serve, stderr_length_check, update_lints};