diff --git a/components/malloc_size_of/rustfmt.toml b/components/malloc_size_of/rustfmt.toml
new file mode 100644
index 00000000000..c7ad93bafe3
--- /dev/null
+++ b/components/malloc_size_of/rustfmt.toml
@@ -0,0 +1 @@
+disable_all_formatting = true
diff --git a/components/servo_arc/rustfmt.toml b/components/servo_arc/rustfmt.toml
new file mode 100644
index 00000000000..c7ad93bafe3
--- /dev/null
+++ b/components/servo_arc/rustfmt.toml
@@ -0,0 +1 @@
+disable_all_formatting = true
diff --git a/components/to_shmem/rustfmt.toml b/components/to_shmem/rustfmt.toml
new file mode 100644
index 00000000000..c7ad93bafe3
--- /dev/null
+++ b/components/to_shmem/rustfmt.toml
@@ -0,0 +1 @@
+disable_all_formatting = true
diff --git a/servo-tidy.toml b/servo-tidy.toml
index 7bfe4b8698c..5c3713a78a3 100644
--- a/servo-tidy.toml
+++ b/servo-tidy.toml
@@ -69,6 +69,7 @@ files = [
     "./components/selectors/",
     "./components/style/",
     "./components/style_derive/parse.rs",
+    "./components/to_shmem/lib.rs",
     "./resources/hsts_preload.json",
     "./tests/wpt/meta/MANIFEST.json",
     "./tests/wpt/meta-legacy-layout/MANIFEST.json",