diff --git a/src/extensions.rs b/src/extensions.rs
index ed598ff..6630476 100644
--- a/src/extensions.rs
+++ b/src/extensions.rs
@@ -85,6 +85,7 @@ impl fmt::Display for Extensions {
     }
 }
 
+#[allow(dead_code)]
 pub fn parse_extensions(chunk: &str) -> Result<Extensions, ParserError> {
     // check empty
     if chunk.is_empty() {
diff --git a/src/locale.rs b/src/locale.rs
index 8f550ec..4c0fb34 100644
--- a/src/locale.rs
+++ b/src/locale.rs
@@ -1,6 +1,6 @@
 use crate::constants::SEP;
 use crate::errors::ParserError;
-use crate::extensions::{self, parse_extensions_from_iter, Extensions};
+use crate::extensions::{parse_extensions_from_iter, Extensions};
 use crate::lang::{parse_unicode_language_id_from_iter, UnicodeLanguageIdentifier};
 use crate::shared::split_str;
 
diff --git a/src/measure.rs b/src/measure.rs
index c3cab17..b1aa33e 100644
--- a/src/measure.rs
+++ b/src/measure.rs
@@ -54,7 +54,7 @@ fn parse_unicode_measure_unit_from_iter<'a>(
             return Err(ParserError::InvalidSubtag);
         }
 
-        values.push(String::from(subtag.to_string()));
+        values.push(subtag.to_string());
         iter.next();
     }