diff --git a/src/atrule/unknown.rs b/src/atrule/unknown.rs
index 93e639d..51a8e5e 100644
--- a/src/atrule/unknown.rs
+++ b/src/atrule/unknown.rs
@@ -1,6 +1,7 @@
 use crate::{parse::Stmt, selector::Selector};
 
 #[derive(Debug, Clone)]
+#[allow(dead_code)]
 pub(crate) struct UnknownAtRule {
     pub name: String,
     pub super_selector: Selector,
diff --git a/src/lib.rs b/src/lib.rs
index c545b06..199394b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,7 +48,6 @@ grass input.scss
     clippy::new_ret_no_self,
     renamed_and_removed_lints,
     clippy::unknown_clippy_lints,
-    clippy::replace_consts,
     clippy::single_match,
     clippy::float_arithmetic,
     clippy::unimplemented,
@@ -60,6 +59,12 @@ grass input.scss
     clippy::map_err_ignore,
     clippy::default_numeric_fallback,
     clippy::if_then_some_else_none,
+    clippy::string_slice,
+    clippy::separated_literal_suffix,
+    clippy::non_ascii_literal,
+    clippy::same_name_method,
+    clippy::undocumented_unsafe_blocks,
+    clippy::exhaustive_structs,
 
     // temporarily allowed while under heavy development.
     // eventually these allows should be refactored away
@@ -69,8 +74,7 @@ grass input.scss
     clippy::too_many_lines,
     clippy::panic,
     clippy::unwrap_used,
-    clippy::option_unwrap_used,
-    clippy::result_unwrap_used,
+    clippy::unwrap_used,
     clippy::cast_possible_truncation,
     clippy::single_match_else,
     clippy::indexing_slicing,
@@ -334,7 +338,11 @@ fn from_string_with_file_name(input: String, file_name: &str, options: &Options)
 #[cfg_attr(feature = "profiling", inline(never))]
 #[cfg_attr(not(feature = "profiling"), inline)]
 pub fn from_path(p: &str, options: &Options) -> Result<String> {
-    from_string_with_file_name(String::from_utf8(options.fs.read(Path::new(p))?)?, p, options)
+    from_string_with_file_name(
+        String::from_utf8(options.fs.read(Path::new(p))?)?,
+        p,
+        options,
+    )
 }
 
 /// Compile CSS from a string
diff --git a/src/parse/args.rs b/src/parse/args.rs
index f36cfdf..13dde73 100644
--- a/src/parse/args.rs
+++ b/src/parse/args.rs
@@ -75,8 +75,7 @@ impl<'a, 'b> Parser<'a, 'b> {
                                 };
                                 continue;
                             }
-                            q @ '"' | q @ '\'' => {
-                                let q = *q;
+                            &q @ '"' | &q @ '\'' => {
                                 default.push(self.toks.next().unwrap());
                                 default.extend(read_until_closing_quote(self.toks, q)?);
                                 continue;
diff --git a/src/parse/control_flow.rs b/src/parse/control_flow.rs
index 4b374d7..31bd62a 100644
--- a/src/parse/control_flow.rs
+++ b/src/parse/control_flow.rs
@@ -151,7 +151,7 @@ impl<'a, 'b> Parser<'a, 'b> {
 
         let var = self
             .parse_identifier_no_interpolation(false)?
-            .map_node(|n| n.into());
+            .map_node(Into::into);
 
         self.whitespace_or_comment();
         self.span_before = match self.toks.peek() {
@@ -257,7 +257,8 @@ impl<'a, 'b> Parser<'a, 'b> {
                 var.node,
                 Value::Dimension(Some(Number::from(i)), Unit::None, true),
             );
-            let mut these_stmts = self.subparser_with_in_control_flow_flag()
+            let mut these_stmts = self
+                .subparser_with_in_control_flow_flag()
                 .with_toks(&mut Lexer::new_ref(&body))
                 .parse_stmt()?;
             if self.flags.in_function() {
@@ -298,7 +299,8 @@ impl<'a, 'b> Parser<'a, 'b> {
         let mut val = self.parse_value_from_vec(&cond, true)?;
         self.scopes.enter_new_scope();
         while val.node.is_true() {
-            let mut these_stmts = self.subparser_with_in_control_flow_flag()
+            let mut these_stmts = self
+                .subparser_with_in_control_flow_flag()
                 .with_toks(&mut Lexer::new_ref(&body))
                 .parse_stmt()?;
             if self.flags.in_function() {
@@ -322,7 +324,7 @@ impl<'a, 'b> Parser<'a, 'b> {
         loop {
             self.expect_char('$')?;
 
-            vars.push(self.parse_identifier()?.map_node(|i| i.into()));
+            vars.push(self.parse_identifier()?.map_node(Into::into));
 
             self.whitespace_or_comment();
             if self
@@ -374,7 +376,8 @@ impl<'a, 'b> Parser<'a, 'b> {
                 }
             }
 
-            let mut these_stmts = self.subparser_with_in_control_flow_flag()
+            let mut these_stmts = self
+                .subparser_with_in_control_flow_flag()
                 .with_toks(&mut Lexer::new_ref(&body))
                 .parse_stmt()?;
             if self.flags.in_function() {
diff --git a/src/parse/import.rs b/src/parse/import.rs
index ebc0b5b..68a7858 100644
--- a/src/parse/import.rs
+++ b/src/parse/import.rs
@@ -64,12 +64,14 @@ impl<'a, 'b> Parser<'a, 'b> {
 
         for path in &self.options.load_paths {
             if self.options.fs.is_dir(path) {
-                try_path!(path.join(&path_buf)
-                         .with_file_name(name)
-                         .with_extension("scss"));
-                try_path!(path.join(&path_buf)
-                         .with_file_name(format!("_{}", name.to_str().unwrap()))
-                         .with_extension("scss"));
+                try_path!(path
+                    .join(&path_buf)
+                    .with_file_name(name)
+                    .with_extension("scss"));
+                try_path!(path
+                    .join(&path_buf)
+                    .with_file_name(format!("_{}", name.to_str().unwrap()))
+                    .with_extension("scss"));
                 try_path!(path.join(&path_buf).join("index.scss"));
                 try_path!(path.join(&path_buf).join("_index.scss"));
             } else {
diff --git a/src/parse/module.rs b/src/parse/module.rs
index 90f9d45..00674ee 100644
--- a/src/parse/module.rs
+++ b/src/parse/module.rs
@@ -85,7 +85,7 @@ impl<'a, 'b> Parser<'a, 'b> {
                 )
             })?;
 
-            config.insert(name.map_node(|n| n.into()), value)?;
+            config.insert(name.map_node(Into::into), value)?;
 
             match self.toks.next() {
                 Some(Token { kind: ',', .. }) => {
@@ -271,7 +271,7 @@ impl<'a, 'b> Parser<'a, 'b> {
     ) -> SassResult<()> {
         let variable = self
             .parse_identifier_no_interpolation(false)?
-            .map_node(|n| n.into());
+            .map_node(Into::into);
 
         self.whitespace_or_comment();
         self.expect_char(':')?;
diff --git a/src/parse/value/eval.rs b/src/parse/value/eval.rs
index 758d166..10ea34c 100644
--- a/src/parse/value/eval.rs
+++ b/src/parse/value/eval.rs
@@ -224,7 +224,7 @@ impl<'a, 'b: 'a, 'c> ValueVisitor<'a, 'b, 'c> {
             HigherIntermediateValue::Function(function, args, module) => {
                 HigherIntermediateValue::Literal(self.parser.call_function(function, args, module)?)
             }
-            val => val,
+            _ => val,
         })
     }
 
diff --git a/src/parse/value/parse.rs b/src/parse/value/parse.rs
index bec9b22..ca0caca 100644
--- a/src/parse/value/parse.rs
+++ b/src/parse/value/parse.rs
@@ -200,35 +200,36 @@ impl<'a, 'b> Parser<'a, 'b> {
         &mut self,
         mut module: Spanned<Identifier>,
     ) -> SassResult<Spanned<IntermediateValue>> {
-        Ok(
-            IntermediateValue::Value(if self.consume_char_if_exists('$') {
-                let var = self
-                    .parse_identifier_no_interpolation(false)?
-                    .map_node(|i| i.into());
+        let is_var_start = self.consume_char_if_exists('$');
 
-                module.span = module.span.merge(var.span);
+        let var_or_fn_name = self
+            .parse_identifier_no_interpolation(false)?
+            .map_node(Into::into);
 
-                let value = self.modules.get(module.node, module.span)?.get_var(var)?;
-                HigherIntermediateValue::Literal(value.clone())
-            } else {
-                let fn_name = self
-                    .parse_identifier_no_interpolation(false)?
-                    .map_node(|i| i.into());
+        let value = if is_var_start {
+            module.span = module.span.merge(var_or_fn_name.span);
 
-                let function = self
-                    .modules
-                    .get(module.node, module.span)?
-                    .get_fn(fn_name)?
-                    .ok_or(("Undefined function.", fn_name.span))?;
+            let value = self
+                .modules
+                .get(module.node, module.span)?
+                .get_var(var_or_fn_name)?;
 
-                self.expect_char('(')?;
+            HigherIntermediateValue::Literal(value.clone())
+        } else {
+            let function = self
+                .modules
+                .get(module.node, module.span)?
+                .get_fn(var_or_fn_name)?
+                .ok_or(("Undefined function.", var_or_fn_name.span))?;
 
-                let call_args = self.parse_call_args()?;
+            self.expect_char('(')?;
 
-                HigherIntermediateValue::Function(function, call_args, Some(module))
-            })
-            .span(module.span),
-        )
+            let call_args = self.parse_call_args()?;
+
+            HigherIntermediateValue::Function(function, call_args, Some(module))
+        };
+
+        Ok(IntermediateValue::Value(value).span(module.span))
     }
 
     fn parse_fn_call(
@@ -532,8 +533,10 @@ impl<'a, 'b> Parser<'a, 'b> {
                     Unit::from(u.node)
                 }
                 '-' => {
-                    if let Some(Token { kind, .. }) = self.toks.peek_next() {
-                        self.toks.reset_cursor();
+                    let next_token = self.toks.peek_next();
+                    self.toks.reset_cursor();
+
+                    if let Some(Token { kind, .. }) = next_token {
                         if matches!(kind, 'a'..='z' | 'A'..='Z' | '_' | '\\' | '\u{7f}'..=std::char::MAX)
                         {
                             let u = self.parse_identifier_no_interpolation(true)?;
@@ -543,7 +546,6 @@ impl<'a, 'b> Parser<'a, 'b> {
                             Unit::None
                         }
                     } else {
-                        self.toks.reset_cursor();
                         Unit::None
                     }
                 }
@@ -889,7 +891,7 @@ impl<'a, 'b> Parser<'a, 'b> {
             '$' => {
                 self.toks.next();
                 let val = match self.parse_identifier_no_interpolation(false) {
-                    Ok(v) => v.map_node(|i| i.into()),
+                    Ok(v) => v.map_node(Into::into),
                     Err(e) => return Some(Err(e)),
                 };
                 IntermediateValue::Value(HigherIntermediateValue::Literal(
@@ -1168,9 +1170,10 @@ impl<'a, 'b: 'a, 'c> IntermediateValueIterator<'a, 'b, 'c> {
                 }
             }
             Op::Plus => {
+                self.whitespace();
+                let right = self.single_value(in_paren)?;
+
                 if let Some(left) = space_separated.pop() {
-                    self.whitespace();
-                    let right = self.single_value(in_paren)?;
                     space_separated.push(Spanned {
                         node: HigherIntermediateValue::BinaryOp(
                             Box::new(left.node),
@@ -1180,8 +1183,6 @@ impl<'a, 'b: 'a, 'c> IntermediateValueIterator<'a, 'b, 'c> {
                         span: left.span.merge(right.span),
                     });
                 } else {
-                    self.whitespace();
-                    let right = self.single_value(in_paren)?;
                     space_separated.push(Spanned {
                         node: HigherIntermediateValue::UnaryOp(op.node, Box::new(right.node)),
                         span: right.span,
diff --git a/src/selector/compound.rs b/src/selector/compound.rs
index 8b4ae07..3264fb1 100644
--- a/src/selector/compound.rs
+++ b/src/selector/compound.rs
@@ -134,13 +134,13 @@ impl CompoundSelector {
                             if !sel.contains_parent_selector() {
                                 return Ok(SimpleSelector::Pseudo(pseudo));
                             }
+
                             pseudo.selector = Some(Box::new(
                                 sel.resolve_parent_selectors(Some(parent.clone()), false)?,
                             ));
-                            Ok(SimpleSelector::Pseudo(pseudo))
-                        } else {
-                            Ok(SimpleSelector::Pseudo(pseudo))
                         }
+
+                        Ok(SimpleSelector::Pseudo(pseudo))
                     } else {
                         Ok(simple)
                     }
@@ -181,20 +181,17 @@ impl CompoundSelector {
                             .into());
                     };
 
-                    let last = if let Some(SimpleSelector::Parent(Some(suffix))) =
-                        self.components.first()
-                    {
-                        let mut components = last.components;
+                    let mut components = last.components;
+
+                    if let Some(SimpleSelector::Parent(Some(suffix))) = self.components.first() {
                         let mut end = components.pop().unwrap();
                         end.add_suffix(suffix, span)?;
                         components.push(end);
-                        components.extend(resolved_members.clone().into_iter().skip(1));
-                        CompoundSelector { components }
-                    } else {
-                        let mut components = last.components;
-                        components.extend(resolved_members.clone().into_iter().skip(1));
-                        CompoundSelector { components }
-                    };
+                    }
+
+                    components.extend(resolved_members.clone().into_iter().skip(1));
+
+                    let last = CompoundSelector { components };
 
                     complex.components.pop();
 
diff --git a/src/selector/extend/extension.rs b/src/selector/extend/extension.rs
index e6e416a..f766027 100644
--- a/src/selector/extend/extension.rs
+++ b/src/selector/extend/extension.rs
@@ -30,7 +30,10 @@ pub(crate) struct Extension {
     /// The span in which `extender` was defined.
     pub span: Span,
 
+    #[allow(dead_code)]
     pub left: Option<Box<Extension>>,
+
+    #[allow(dead_code)]
     pub right: Option<Box<Extension>>,
 }
 
diff --git a/src/selector/extend/rule.rs b/src/selector/extend/rule.rs
index f0d7a69..25da0eb 100644
--- a/src/selector/extend/rule.rs
+++ b/src/selector/extend/rule.rs
@@ -4,8 +4,10 @@ use crate::selector::Selector;
 
 #[derive(Clone, Debug)]
 pub(crate) struct ExtendRule {
+    #[allow(dead_code)]
     pub selector: Selector,
     pub is_optional: bool,
+    #[allow(dead_code)]
     pub span: Span,
 }
 
diff --git a/src/unit/mod.rs b/src/unit/mod.rs
index 26d0b6e..d413dae 100644
--- a/src/unit/mod.rs
+++ b/src/unit/mod.rs
@@ -107,7 +107,7 @@ pub(crate) enum Unit {
 
     /// Units multiplied together
     /// Boxed under the assumption that mul units are exceedingly rare
-    #[allow(clippy::box_vec)]
+    #[allow(clippy::box_collection)]
     Mul(Box<Vec<Unit>>),
 
     /// Units divided by each other
@@ -222,6 +222,7 @@ impl Mul<Unit> for Unit {
 
 impl Div<Unit> for Unit {
     type Output = Unit;
+    #[allow(clippy::if_same_then_else)]
     fn div(self, rhs: Unit) -> Self::Output {
         if let Unit::Div(..) = self {
             todo!()