diff --git a/src/api.rs b/src/api.rs
index 852fd2a7..899b1ab6 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -2,7 +2,7 @@
 
 use crate::any::{Dynamic, Variant};
 use crate::engine::{Engine, Imports, State};
-use crate::error::{ParseError, ParseErrorType};
+use crate::error::ParseError;
 use crate::fn_native::{IteratorFn, SendSync};
 use crate::module::{FuncReturn, Module};
 use crate::optimize::OptimizationLevel;
@@ -18,6 +18,7 @@ use crate::engine::{FN_IDX_GET, FN_IDX_SET};
 #[cfg(not(feature = "no_object"))]
 use crate::{
     engine::{make_getter, make_setter, Map},
+    error::ParseErrorType,
     fn_register::{RegisterFn, RegisterResultFn},
     token::Token,
 };
@@ -34,7 +35,6 @@ use crate::optimize::optimize_into_ast;
 use crate::stdlib::{
     any::{type_name, TypeId},
     boxed::Box,
-    string::ToString,
 };
 
 #[cfg(not(feature = "no_optimize"))]
@@ -944,8 +944,8 @@ impl Engine {
             ["#", json_text]
         } else {
             return Err(ParseErrorType::MissingToken(
-                Token::LeftBrace.syntax().to_string(),
-                "to start a JSON object hash".to_string(),
+                Token::LeftBrace.syntax().into(),
+                "to start a JSON object hash".into(),
             )
             .into_err(Position::new(1, (json.len() - json_text.len() + 1) as u16))
             .into());
diff --git a/tests/closures.rs b/tests/closures.rs
index 4eb8d81b..348aa162 100644
--- a/tests/closures.rs
+++ b/tests/closures.rs
@@ -1,12 +1,13 @@
 #![cfg(not(feature = "no_function"))]
-use rhai::{
-    Dynamic, Engine, EvalAltResult, FnPtr, Map, Module, ParseErrorType, RegisterFn, Scope, INT,
-};
+use rhai::{Dynamic, Engine, EvalAltResult, FnPtr, Module, ParseErrorType, RegisterFn, Scope, INT};
 use std::any::TypeId;
 use std::cell::RefCell;
 use std::mem::take;
 use std::rc::Rc;
 
+#[cfg(not(feature = "no_object"))]
+use rhai::Map;
+
 #[test]
 fn test_fn_ptr_curry_call() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();