diff --git a/schala-lang/language/src/ast/visualize.rs b/schala-lang/language/src/ast/visualize.rs
index a6c312e..5957cbf 100644
--- a/schala-lang/language/src/ast/visualize.rs
+++ b/schala-lang/language/src/ast/visualize.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::single_char_add_str)]
 use super::{
     Block, Declaration, Expression, ExpressionKind, ImportSpecifier, InvocationArgument, ModuleSpecifier,
     Signature, Statement, StatementKind, AST,
@@ -18,8 +19,8 @@ fn newline(buf: &mut String) {
 pub(super) fn render_ast(ast: &AST) -> String {
     let AST { statements, .. } = ast;
 
-    let mut buf = format!("(AST\n");
-    render_block(&statements, LEVEL, &mut buf);
+    let mut buf = "(AST\n".to_string();
+    render_block(statements, LEVEL, &mut buf);
 
     buf.push(')');
 
@@ -168,12 +169,12 @@ fn render_declaration(decl: &Declaration, indent: usize, buf: &mut String) {
                      */
     }
     do_indent(indent, buf);
-    buf.push_str(")");
+    buf.push(')');
 }
 
 fn render_block(block: &Block, indent: usize, buf: &mut String) {
     for stmt in block.statements.iter() {
-        render_statement(&stmt, indent, buf);
+        render_statement(stmt, indent, buf);
         newline(buf);
     }
 }
diff --git a/schala-lang/language/src/symbol_table/resolver.rs b/schala-lang/language/src/symbol_table/resolver.rs
index b589399..3ea516c 100644
--- a/schala-lang/language/src/symbol_table/resolver.rs
+++ b/schala-lang/language/src/symbol_table/resolver.rs
@@ -161,7 +161,7 @@ impl<'a> ASTVisitor for ScopeResolver<'a> {
                 let mut new_scope =
                     ScopeStack::new(Some(ScopeType::Function { name: signature.name.clone() }));
 
-                for (n, param) in param_names.enumerate().into_iter() {
+                for (n, param) in param_names.enumerate() {
                     new_scope.insert(param, NameType::Param(n as u8));
                 }
 
@@ -198,7 +198,7 @@ impl<'a> ASTVisitor for ScopeResolver<'a> {
                 //let mut new_scope = self.lexical_scopes.new_scope(Some(ScopeType::Function { name: signature.name.clone() }));
                 let mut new_scope = ScopeStack::new(Some(ScopeType::Lambda));
 
-                for (n, param) in param_names.enumerate().into_iter() {
+                for (n, param) in param_names.enumerate() {
                     new_scope.insert(param, NameType::Param(n as u8));
                 }
 
diff --git a/schala-lang/language/src/tree_walk_eval/evaluator.rs b/schala-lang/language/src/tree_walk_eval/evaluator.rs
index 1d6adf8..8beabc5 100644
--- a/schala-lang/language/src/tree_walk_eval/evaluator.rs
+++ b/schala-lang/language/src/tree_walk_eval/evaluator.rs
@@ -25,7 +25,7 @@ impl<'a, 'b> Evaluator<'a, 'b> {
 
         for statement in reduced.entrypoint.into_iter() {
             match self.statement(statement) {
-                Ok(Some(output)) if repl => acc.push(Ok(output.to_repl(&self.type_context))),
+                Ok(Some(output)) if repl => acc.push(Ok(output.to_repl(self.type_context))),
                 Ok(_) => (),
                 Err(error) => {
                     acc.push(Err(error.msg));
diff --git a/schala-lang/language/src/tree_walk_eval/mod.rs b/schala-lang/language/src/tree_walk_eval/mod.rs
index af443d8..6e0fda1 100644
--- a/schala-lang/language/src/tree_walk_eval/mod.rs
+++ b/schala-lang/language/src/tree_walk_eval/mod.rs
@@ -137,8 +137,7 @@ impl Primitive {
                 )
             }
             Primitive::Object { type_id, items, tag, ordered_fields: Some(fields) } => {
-                let mut buf = format!("{}", type_context.variant_local_name(type_id, *tag).unwrap());
-                write!(buf, " {{ ").unwrap();
+                let mut buf = format!("{} {{ ", type_context.variant_local_name(type_id, *tag).unwrap());
                 for item in fields.iter().zip(items.iter()).map(Some).intersperse(None) {
                     match item {
                         Some((name, val)) => write!(buf, "{}: {}", name, val.to_repl(type_context)).unwrap(),