diff --git a/dust-lang/src/abstract_tree/logic.rs b/dust-lang/src/abstract_tree/logic.rs
index c103d25..ce1008a 100644
--- a/dust-lang/src/abstract_tree/logic.rs
+++ b/dust-lang/src/abstract_tree/logic.rs
@@ -258,7 +258,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0)))
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -270,7 +270,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(43).with_position((0, 0)))
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -282,7 +282,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(43).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0)))
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -294,7 +294,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(43).with_position((0, 0)))
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -306,7 +306,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(41).with_position((0, 0)))
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         );
 
@@ -315,7 +315,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         );
     }
@@ -327,7 +327,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(41).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         );
 
@@ -336,7 +336,7 @@ mod tests {
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
                 Expression::Value(ValueNode::Integer(42).with_position((0, 0))),
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         );
     }
@@ -348,7 +348,7 @@ mod tests {
                 Expression::Value(ValueNode::Boolean(true).with_position((0, 0))),
                 Expression::Value(ValueNode::Boolean(true).with_position((0, 0))),
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -360,7 +360,7 @@ mod tests {
                 Expression::Value(ValueNode::Boolean(true).with_position((0, 0))),
                 Expression::Value(ValueNode::Boolean(false).with_position((0, 0))),
             )
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
@@ -371,7 +371,7 @@ mod tests {
             Logic::Not(Expression::Value(
                 ValueNode::Boolean(false).with_position((0, 0))
             ))
-            .evaluate(&mut Context::new(), true, SourcePosition(0, 0)),
+            .evaluate(&Context::new(), true, SourcePosition(0, 0)),
             Ok(Some(Evaluation::Return(Value::boolean(true))))
         )
     }
diff --git a/dust-lang/src/abstract_tree/value_node.rs b/dust-lang/src/abstract_tree/value_node.rs
index a5e17a8..59a04de 100644
--- a/dust-lang/src/abstract_tree/value_node.rs
+++ b/dust-lang/src/abstract_tree/value_node.rs
@@ -128,8 +128,7 @@ impl AbstractNode for ValueNode {
 
                     let found = variants
                         .into_iter()
-                        .find(|(identifier, _)| identifier == &variant.node)
-                        .is_some();
+                        .any(|(identifier, _)| identifier == variant.node);
 
                     if !found {
                         return Err(ValidationError::EnumVariantNotFound {
diff --git a/dust-lang/src/parser/mod.rs b/dust-lang/src/parser/mod.rs
index b8cd75f..7155117 100644
--- a/dust-lang/src/parser/mod.rs
+++ b/dust-lang/src/parser/mod.rs
@@ -345,7 +345,7 @@ pub fn parser<'src>(
                             type_name,
                             type_arguments,
                             variant,
-                            content: content.map(|expression| Box::new(expression)),
+                            content: content.map(Box::new),
                         }
                         .with_position(state.span()),
                     )
diff --git a/dust-lang/src/parser/tests.rs b/dust-lang/src/parser/tests.rs
index 9103cbb..5d993fc 100644
--- a/dust-lang/src/parser/tests.rs
+++ b/dust-lang/src/parser/tests.rs
@@ -286,7 +286,7 @@ fn built_in_function() {
         .map_err(|errors| {
             errors
                 .into_iter()
-                .map(|error| DustError::from(error))
+                .map(DustError::from)
                 .collect::<Vec<DustError>>()
         })
         .unwrap();
@@ -308,7 +308,7 @@ fn built_in_function_with_arg() {
         .map_err(|errors| {
             errors
                 .into_iter()
-                .map(|error| DustError::from(error))
+                .map(DustError::from)
                 .collect::<Vec<DustError>>()
         })
         .unwrap();
diff --git a/dust-lang/src/value.rs b/dust-lang/src/value.rs
index e08831d..3dcfc67 100644
--- a/dust-lang/src/value.rs
+++ b/dust-lang/src/value.rs
@@ -649,7 +649,7 @@ impl ValueInner {
                 }
             }
             ValueInner::Structure { name, .. } => {
-                if let Some(r#type) = context.get_type(&name)? {
+                if let Some(r#type) = context.get_type(name)? {
                     r#type
                 } else {
                     return Err(ValidationError::StructDefinitionNotFound {