diff --git a/src/builtin/functions/color/hsl.rs b/src/builtin/functions/color/hsl.rs
index 83b2543..f26d1ec 100644
--- a/src/builtin/functions/color/hsl.rs
+++ b/src/builtin/functions/color/hsl.rs
@@ -480,14 +480,15 @@ pub(crate) fn invert(mut args: CallArgs, parser: &mut Parser<'_>) -> SassResult<
     };
     match args.get_err(0, "color")? {
         Value::Color(c) => Ok(Value::Color(Box::new(
-            c.invert(weight.unwrap_or(Number::one())),
+            c.invert(weight.unwrap_or_else(Number::one)),
         ))),
         Value::Dimension(Some(n), u, _) => {
             if weight.is_some() {
-                Err((
+                return Err((
                     "Only one argument may be passed to the plain-CSS invert() function.",
                     args.span(),
-                ))?;
+                )
+                    .into());
             }
             Ok(Value::String(
                 format!("invert({}{})", n, u),
diff --git a/src/lib.rs b/src/lib.rs
index cf0e540..e4ae280 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -52,6 +52,12 @@ grass input.scss
     clippy::single_match,
     clippy::float_arithmetic,
     clippy::unimplemented,
+    clippy::pattern_type_mismatch,
+    clippy::blanket_clippy_restriction_lints,
+    clippy::option_if_let_else,
+    clippy::panic_in_result_fn,
+    clippy::unwrap_in_result,
+    clippy::map_err_ignore,
 
     // temporarily allowed while under heavy development.
     // eventually these allows should be refactored away
@@ -69,6 +75,7 @@ grass input.scss
     clippy::redundant_pub_crate,
     // the api is changing too often to allot this
     clippy::missing_errors_doc,
+    clippy::missing_const_for_fn,
 
     clippy::integer_arithmetic,
     clippy::string_add,
diff --git a/src/parse/control_flow.rs b/src/parse/control_flow.rs
index 308a764..7f85522 100644
--- a/src/parse/control_flow.rs
+++ b/src/parse/control_flow.rs
@@ -188,10 +188,7 @@ impl<'a> Parser<'a> {
                     Err(..) => return false,
                 };
                 ident.node.make_ascii_lowercase();
-                let v = match ident.node.to_ascii_lowercase().as_str() {
-                    "to" | "through" => true,
-                    _ => false,
-                };
+                let v = matches!(ident.node.to_ascii_lowercase().as_str(), "to" | "through");
                 toks.reset_cursor();
                 v
             }
diff --git a/src/parse/ident.rs b/src/parse/ident.rs
index bfe9af0..7a60bd0 100644
--- a/src/parse/ident.rs
+++ b/src/parse/ident.rs
@@ -307,9 +307,7 @@ impl<'a> Parser<'a> {
                             self.toks.next();
                         }
 
-                        if value == 0
-                            || (value >= 0xD800 && value <= 0xDFFF)
-                            || value >= 0x0010_FFFF
+                        if value == 0 || (0xD800..=0xDFFF).contains(&value) || value >= 0x0010_FFFF
                         {
                             s.push('\u{FFFD}');
                         } else {
diff --git a/src/parse/media.rs b/src/parse/media.rs
index 3a4eafd..d7df971 100644
--- a/src/parse/media.rs
+++ b/src/parse/media.rs
@@ -82,9 +82,8 @@ impl<'a> Parser<'a> {
             buf.push(':');
             buf.push(' ');
 
-            let value = self.parse_value(false, &|toks| match toks.peek() {
-                Some(Token { kind: ')', .. }) => true,
-                _ => false,
+            let value = self.parse_value(false, &|toks| {
+                matches!(toks.peek(), Some(Token { kind: ')', .. }))
             })?;
             self.expect_char(')')?;
 
diff --git a/src/parse/module.rs b/src/parse/module.rs
index 04e44fc..bc14170 100644
--- a/src/parse/module.rs
+++ b/src/parse/module.rs
@@ -68,10 +68,10 @@ impl<'a> Parser<'a> {
                 self.expect_char(':')?;
                 self.whitespace_or_comment();
 
-                let value = self.parse_value(false, &|toks| match toks.peek() {
-                    Some(Token { kind: ',', .. }) | Some(Token { kind: ')', .. }) => true,
-                    _ => false,
-                })?;
+                let value = self.parse_value(
+                    false,
+                    &|toks| matches!(toks.peek(), Some(Token { kind: ',', .. }) | Some(Token { kind: ')', .. }))
+                )?;
 
                 config.insert(name.map_node(|n| n.into()), value)?;
 
diff --git a/src/parse/value/css_function.rs b/src/parse/value/css_function.rs
index c20b0c3..a8e8127 100644
--- a/src/parse/value/css_function.rs
+++ b/src/parse/value/css_function.rs
@@ -95,7 +95,7 @@ impl<'a> Parser<'a> {
             if kind == '!'
                 || kind == '%'
                 || kind == '&'
-                || (kind >= '*' && kind <= '~')
+                || ('*'..='~').contains(&kind)
                 || kind as u32 >= 0x0080
             {
                 buf.push(kind);
diff --git a/src/selector/parse.rs b/src/selector/parse.rs
index 46f47dc..b8575ac 100644
--- a/src/selector/parse.rs
+++ b/src/selector/parse.rs
@@ -560,10 +560,10 @@ fn is_fake_pseudo_element(name: &str) -> bool {
     match name.as_bytes().first() {
         Some(b'a') | Some(b'A') => name.to_ascii_lowercase() == "after",
         Some(b'b') | Some(b'B') => name.to_ascii_lowercase() == "before",
-        Some(b'f') | Some(b'F') => match name.to_ascii_lowercase().as_str() {
-            "first-line" | "first-letter" => true,
-            _ => false,
-        },
+        Some(b'f') | Some(b'F') => matches!(
+            name.to_ascii_lowercase().as_str(),
+            "first-line" | "first-letter"
+        ),
         _ => false,
     }
 }
diff --git a/src/value/mod.rs b/src/value/mod.rs
index 141c74e..f89a088 100644
--- a/src/value/mod.rs
+++ b/src/value/mod.rs
@@ -286,10 +286,7 @@ impl Value {
     }
 
     pub fn is_true(&self) -> bool {
-        match self {
-            Value::Null | Value::False => false,
-            _ => true,
-        }
+        !matches!(self, Value::Null | Value::False)
     }
 
     pub fn unquote(self) -> Self {