diff --git a/cargo-miri/src/main.rs b/cargo-miri/src/main.rs
index f809eecf96a..7b16af6f0c6 100644
--- a/cargo-miri/src/main.rs
+++ b/cargo-miri/src/main.rs
@@ -1,5 +1,5 @@
 #![feature(let_else)]
-#![allow(clippy::useless_format, clippy::derive_partial_eq_without_eq)]
+#![allow(clippy::useless_format, clippy::derive_partial_eq_without_eq, rustc::internal)]
 
 mod arg;
 mod phases;
diff --git a/miri b/miri
index 0295fc3ab3a..5893d0ca05f 100755
--- a/miri
+++ b/miri
@@ -124,6 +124,8 @@ fi
 if [ -z "$CARGO_PROFILE_DEV_OPT_LEVEL" ]; then
     export CARGO_PROFILE_DEV_OPT_LEVEL=2
 fi
+# Enable rustc-specific lints
+export RUSTFLAGS="-Zunstable-options -Wrustc::internal $RUSTFLAGS"
 # We set the rpath so that Miri finds the private rustc libraries it needs.
 export RUSTFLAGS="-C link-args=-Wl,-rpath,$LIBDIR $RUSTFLAGS"
 
diff --git a/ui_test/src/lib.rs b/ui_test/src/lib.rs
index 9206c0f3d8e..871574c4936 100644
--- a/ui_test/src/lib.rs
+++ b/ui_test/src/lib.rs
@@ -1,4 +1,9 @@
-#![allow(clippy::enum_variant_names, clippy::useless_format, clippy::too_many_arguments)]
+#![allow(
+    clippy::enum_variant_names,
+    clippy::useless_format,
+    clippy::too_many_arguments,
+    rustc::internal
+)]
 
 use std::collections::VecDeque;
 use std::ffi::OsString;