diff --git a/Cargo.toml b/Cargo.toml
index fe6af39..2df6c6a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,3 +60,7 @@ stylish-plain.optional = true
 all-features = true
 targets = ["x86_64-unknown-linux-gnu"]
 rustdoc-args = ["--cfg", "docsrs"]
+
+[lints.rust]
+unexpected_cfgs.level = "warn"
+unexpected_cfgs.check-cfg = ['cfg(stylish_proc_macro_expand)']
diff --git a/core/Cargo.toml b/core/Cargo.toml
index ff54981..bef2257 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -33,3 +33,7 @@ stylish.version = "0.1.0"
 all-features = true
 targets = ["x86_64-unknown-linux-gnu"]
 rustdoc-args = ["--cfg", "docsrs"]
+
+[lints.rust]
+unexpected_cfgs.level = "warn"
+unexpected_cfgs.check-cfg = ['cfg(stylish_proc_macro_expand)']
diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 77a3207..d44f288 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -32,3 +32,7 @@ unicode-ident.version = "1.0.3"
 all-features = true
 targets = ["x86_64-unknown-linux-gnu"]
 rustdoc-args = ["--cfg", "docsrs"]
+
+[lints.rust]
+unexpected_cfgs.level = "warn"
+unexpected_cfgs.check-cfg = ['cfg(stylish_proc_macro_expand)']
diff --git a/macros/src/format.rs b/macros/src/format.rs
index cca8725..896a3eb 100644
--- a/macros/src/format.rs
+++ b/macros/src/format.rs
@@ -19,11 +19,11 @@ fn identifier(input: &str) -> IResult<&str, &str> {
 }
 
 pub trait Parse<'a>: Sized {
-    fn parse(input: &'a str) -> IResult<&str, Self>;
+    fn parse(input: &'a str) -> IResult<&'a str, Self>;
 }
 
 impl<'a> Parse<'a> for Color {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             value(Color::Black, tag("black")),
             value(Color::Red, tag("red")),
@@ -39,7 +39,7 @@ impl<'a> Parse<'a> for Color {
 }
 
 impl<'a> Parse<'a> for Intensity {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             value(Intensity::Normal, tag("normal")),
             value(Intensity::Bold, tag("bold")),
@@ -50,7 +50,7 @@ impl<'a> Parse<'a> for Intensity {
 
 impl<'a> Parse<'a> for Box<dyn Restyle> {
     #[allow(trivial_casts)]
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             map(
                 preceded(tag("fg"), cut(preceded(tag("="), Color::parse))),
@@ -66,7 +66,7 @@ impl<'a> Parse<'a> for Box<dyn Restyle> {
 }
 
 impl<'a> Parse<'a> for StyleDiff {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         // TODO: This should only allow each variant once, but there's no sort of
         // optional-permutation helper in nom
         map(
@@ -88,7 +88,7 @@ pub enum Align {
 }
 
 impl<'a> Parse<'a> for Align {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             value(Self::Left, tag("<")),
             value(Self::Center, tag("^")),
@@ -104,7 +104,7 @@ pub enum Sign {
 }
 
 impl<'a> Parse<'a> for Sign {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((value(Self::Plus, tag("+")), value(Self::Minus, tag("-"))))(input)
     }
 }
@@ -153,7 +153,7 @@ pub enum Count<'a> {
 }
 
 impl<'a> Parse<'a> for Count<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             map(terminated(FormatArgRef::parse, tag("$")), Self::Parameter),
             map(map_res(digit1, usize::from_str), Self::Integer),
@@ -169,7 +169,7 @@ pub struct FormatSpec<'a> {
 }
 
 impl<'a> Parse<'a> for FormatSpec<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         let (input, align) = opt(alt((
             pair(anychar, Align::parse),
             map(Align::parse, |align| (' ', align)),
@@ -227,7 +227,7 @@ pub enum FormatArgRef<'a> {
 }
 
 impl<'a> Parse<'a> for FormatArgRef<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             map(map_res(digit1, usize::from_str), FormatArgRef::Positional),
             map(identifier, FormatArgRef::Named),
@@ -242,7 +242,7 @@ pub struct FormatArg<'a> {
 }
 
 impl<'a> Parse<'a> for FormatArg<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         let (input, arg) = opt(FormatArgRef::parse)(input)?;
         let (input, format_spec) = opt(preceded(tag(":"), FormatSpec::parse))(input)?;
         Ok((
@@ -263,7 +263,7 @@ pub enum Piece<'a> {
 }
 
 impl<'a> Piece<'a> {
-    pub fn parse_lit(input: &'a str) -> IResult<&str, Self> {
+    pub fn parse_lit(input: &'a str) -> IResult<&'a str, Self> {
         alt((
             map(recognize(many1(none_of("{}"))), Self::Lit),
             value(Self::Lit("{"), tag("{{")),
@@ -271,7 +271,7 @@ impl<'a> Piece<'a> {
         ))(input)
     }
 
-    pub fn parse_arg(input: &'a str) -> IResult<&str, Self> {
+    pub fn parse_arg(input: &'a str) -> IResult<&'a str, Self> {
         map(
             delimited(tag("{"), cut(FormatArg::parse), tag("}")),
             Self::Arg,
@@ -280,7 +280,7 @@ impl<'a> Piece<'a> {
 }
 
 impl<'a> Parse<'a> for Piece<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         alt((Self::parse_lit, Self::parse_arg))(input)
     }
 }
@@ -291,7 +291,7 @@ pub struct Format<'a> {
 }
 
 impl<'a> Parse<'a> for Format<'a> {
-    fn parse(input: &'a str) -> IResult<&str, Self> {
+    fn parse(input: &'a str) -> IResult<&'a str, Self> {
         all_consuming(map(many0(Piece::parse), |pieces| Self { pieces }))(input)
     }
 }
diff --git a/macros/src/to_tokens.rs b/macros/src/to_tokens.rs
index 84d3cae..5a6d4ea 100644
--- a/macros/src/to_tokens.rs
+++ b/macros/src/to_tokens.rs
@@ -142,7 +142,7 @@ impl<'a> ToTokens for Scoped<'a, Sign> {
 impl<'a, 'b: 'a> ToTokens for Scoped<'a, Count<'b>> {
     fn to_tokens(&self, tokens: &mut TokenStream) {
         match self.as_ref() {
-            Count::Parameter(_) => todo!(),
+            Count::Parameter(_value) => todo!("parameter reference counts are not yet supported"),
             Count::Integer(value) => quote!(&#value).to_tokens(tokens),
         }
     }
diff --git a/plain/tests/tests.rs b/plain/tests/tests.rs
index 81beaa9..d4885f8 100644
--- a/plain/tests/tests.rs
+++ b/plain/tests/tests.rs
@@ -45,6 +45,7 @@ mod tests {
 
     #[test]
     fn large() {
+        #[allow(dead_code)]
         struct Foo([usize; 24]);
 
         impl stylish_core::Display for Foo {
diff --git a/tests/tests.rs b/tests/tests.rs
index 5c0d18c..1914e3b 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -74,6 +74,7 @@ mod tests {
 
     #[test]
     fn large() {
+        #[allow(dead_code)]
         struct Foo([usize; 24]);
 
         impl stylish::Display for Foo {