diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index 6626fead774d6..38dda5b744e05 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -321,11 +321,9 @@ macro_rules! tool_check_step {
                 }
 
                 // Enable internal lints for clippy and rustdoc
-                // NOTE: this intentionally doesn't enable lints for any other tools,
-                // see https://github.com/rust-lang/rust/pull/80573#issuecomment-754010776
-                if $path == "src/tools/rustdoc" || $path == "src/tools/clippy" {
-                    cargo.rustflag("-Zunstable-options");
-                }
+                // NOTE: this doesn't enable lints for any other tools unless they explicitly add `#![warn(rustc::internal)]`
+                // See https://github.com/rust-lang/rust/pull/80573#issuecomment-754010776
+                cargo.rustflag("-Zunstable-options");
 
                 builder.info(&format!(
                     "Checking stage{} {} artifacts ({} -> {})",
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 26aaf0db6f620..985aeedabb106 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -16,7 +16,7 @@
 #![feature(type_ascription)]
 #![feature(iter_intersperse)]
 #![recursion_limit = "256"]
-#![deny(rustc::internal)]
+#![warn(rustc::internal)]
 
 #[macro_use]
 extern crate lazy_static;
diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs
index 757d7669bd806..8c74284fa46ea 100644
--- a/src/tools/clippy/clippy_lints/src/lib.rs
+++ b/src/tools/clippy/clippy_lints/src/lib.rs
@@ -17,7 +17,7 @@
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 // warn on rustc internal lints
-#![deny(rustc::internal)]
+#![warn(rustc::internal)]
 
 // FIXME: switch to something more ergonomic here, once available.
 // (Currently there is no way to opt into sysroot crates without `extern crate`.)
diff --git a/src/tools/clippy/src/driver.rs b/src/tools/clippy/src/driver.rs
index fa0c5f01430b6..750a23e8c9841 100644
--- a/src/tools/clippy/src/driver.rs
+++ b/src/tools/clippy/src/driver.rs
@@ -4,7 +4,7 @@
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 // warn on rustc internal lints
-#![deny(rustc::internal)]
+#![warn(rustc::internal)]
 
 // FIXME: switch to something more ergonomic here, once available.
 // (Currently there is no way to opt into sysroot crates without `extern crate`.)