diff --git a/.cargo/config b/.cargo/config.toml
similarity index 100%
rename from .cargo/config
rename to .cargo/config.toml
diff --git a/Cargo.toml b/Cargo.toml
index 1da03661bb..995b2f1d9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -77,6 +77,9 @@ internal-tests = [
     "tokio/rt-multi-thread",
 ]
 
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs)'] }
+
 [dev-dependencies]
 safer-ffi.path = "."
 safer-ffi.features = ["internal-tests"]
@@ -110,7 +113,7 @@ scopeguard.default-features = false
 
 serde.version = "1.0.204"
 serde.optional = true
-serde.default_features = false
+serde.default-features = false
 
 stabby.version = "36.1.1"
 stabby.optional = true
diff --git a/src/proc_macro/derives/c_type/struct_.rs b/src/proc_macro/derives/c_type/struct_.rs
index 7005553431..59828315c8 100644
--- a/src/proc_macro/derives/c_type/struct_.rs
+++ b/src/proc_macro/derives/c_type/struct_.rs
@@ -2,6 +2,7 @@
 
 use super::*;
 
+#[allow(unexpected_cfgs)]
 pub(in crate)
 fn derive (
     args: Args,
diff --git a/src/proc_macro/derives/dyn_trait/args.rs b/src/proc_macro/derives/dyn_trait/args.rs
index cfa910d42e..b9c860a0c7 100644
--- a/src/proc_macro/derives/dyn_trait/args.rs
+++ b/src/proc_macro/derives/dyn_trait/args.rs
@@ -28,6 +28,7 @@ define_kws! {$
 
 pub
 struct Args {
+    #[allow(dead_code)]
     pub dyn_: sym![dyn],
     pub clone: Option<sym![Clone]>,
 }
diff --git a/src/proc_macro/derives/dyn_trait/coercions.rs b/src/proc_macro/derives/dyn_trait/coercions.rs
index 997002273a..066fff6a6a 100644
--- a/src/proc_macro/derives/dyn_trait/coercions.rs
+++ b/src/proc_macro/derives/dyn_trait/coercions.rs
@@ -283,6 +283,7 @@ match_! {(
     struct Env<'r> {
         // quote-interpolable/friendly stuff from the caller.
     $(
+        #[allow(dead_code)]
         pub
         $field : &'r dyn ToTokens,
     )*
diff --git a/src/proc_macro/ffi_export/const_.rs b/src/proc_macro/ffi_export/const_.rs
index 589ecd1052..93ab25774d 100644
--- a/src/proc_macro/ffi_export/const_.rs
+++ b/src/proc_macro/ffi_export/const_.rs
@@ -42,6 +42,7 @@ impl Parse for Args {
 }
 
 
+#[allow(unexpected_cfgs)]
 pub(in super)
 fn handle (
     Args { untyped }: Args,
diff --git a/src/proc_macro/ffi_export/fn_/args.rs b/src/proc_macro/ffi_export/fn_/args.rs
index e4abe899f0..c45c79b5e4 100644
--- a/src/proc_macro/ffi_export/fn_/args.rs
+++ b/src/proc_macro/ffi_export/fn_/args.rs
@@ -21,7 +21,7 @@ pub(in crate)
 struct Executor {
     pub(in crate) kw: kw::executor,
     pub(in crate) _eq: Token![=],
-    #[cfg_attr(not(feature = "async_fn"),
+    #[cfg_attr(not(feature = "async-fn"),
         allow(dead_code),
     )]
     pub(in crate) block_on: Expr,
diff --git a/src/proc_macro/ffi_export/static_.rs b/src/proc_macro/ffi_export/static_.rs
index a764f21987..fe6c9514b6 100644
--- a/src/proc_macro/ffi_export/static_.rs
+++ b/src/proc_macro/ffi_export/static_.rs
@@ -6,6 +6,5 @@ fn handle (
     _input: ItemStatic,
 ) -> Result<TokenStream2>
 {
-    #[cfg(not(TODO))]
     todo!("`#[ffi_export]`ing a `static`");
 }