diff --git a/.cargo/config b/.cargo/config.toml
similarity index 100%
rename from .cargo/config
rename to .cargo/config.toml
diff --git a/packages/stylist-core/Cargo.toml b/packages/stylist-core/Cargo.toml
index e65639cb..d24782fc 100644
--- a/packages/stylist-core/Cargo.toml
+++ b/packages/stylist-core/Cargo.toml
@@ -33,3 +33,9 @@ wasm-bindgen-test = "0.3.33"
 [features]
 parser = ["dep:nom"]
 __proc_macro_workaround = []
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = [
+    'cfg(releasing)',
+    'cfg(documenting)',
+] }
diff --git a/packages/stylist-macros/Cargo.toml b/packages/stylist-macros/Cargo.toml
index 5e3e0f45..a1421325 100644
--- a/packages/stylist-macros/Cargo.toml
+++ b/packages/stylist-macros/Cargo.toml
@@ -42,3 +42,9 @@ stylist-core = { path = "../stylist-core", version = "0.14", features = [
 
 [dev-dependencies]
 env_logger = "0.10.0"
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = [
+    'cfg(releasing)',
+    'cfg(documenting)',
+] }
diff --git a/packages/stylist/Cargo.toml b/packages/stylist/Cargo.toml
index 24c74859..546e655d 100644
--- a/packages/stylist/Cargo.toml
+++ b/packages/stylist/Cargo.toml
@@ -66,3 +66,9 @@ hydration = []
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "documenting"]
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = [
+    'cfg(releasing)',
+    'cfg(documenting)',
+] }
diff --git a/packages/stylist/src/lib.rs b/packages/stylist/src/lib.rs
index e1a3871a..c1ac508c 100644
--- a/packages/stylist/src/lib.rs
+++ b/packages/stylist/src/lib.rs
@@ -4,7 +4,6 @@
 #![deny(clippy::all)]
 #![deny(clippy::cognitive_complexity)]
 #![cfg_attr(documenting, feature(doc_cfg))]
-#![cfg_attr(documenting, feature(doc_auto_cfg))]
 #![cfg_attr(any(releasing, not(debug_assertions)), deny(dead_code, unused_imports))]
 
 //! Stylist is a CSS-in-Rust styling solution for WebAssembly Applications.
diff --git a/packages/stylist/src/manager/registry.rs b/packages/stylist/src/manager/registry.rs
index 31ac89d0..41109596 100644
--- a/packages/stylist/src/manager/registry.rs
+++ b/packages/stylist/src/manager/registry.rs
@@ -82,7 +82,7 @@ mod tests {
             let reg = mgr.get_registry();
             let reg = reg.borrow_mut();
 
-            assert!(reg.styles.get(style.key()).is_some());
+            assert!(reg.styles.contains_key(style.key()));
         }
 
         style.unregister();
@@ -92,7 +92,7 @@ mod tests {
             let reg = mgr.get_registry();
             let reg = reg.borrow_mut();
 
-            assert!(reg.styles.get(style.key()).is_none());
+            assert!(!reg.styles.contains_key(style.key()));
         }
     }
 }