diff --git a/crates/oxc_span/src/span/mod.rs b/crates/oxc_span/src/span/mod.rs
index 8fb94109c..4d66624b0 100644
--- a/crates/oxc_span/src/span/mod.rs
+++ b/crates/oxc_span/src/span/mod.rs
@@ -401,6 +401,17 @@ impl<'a> CloneIn<'a> for Span {
 mod test {
     use super::Span;
 
+    #[test]
+    fn test_size() {
+        let s = Span::sized(0, 5);
+        assert_eq!(s.size(), 5);
+        assert!(!s.is_empty());
+
+        let s = Span::sized(5, 0);
+        assert_eq!(s.size(), 0);
+        assert!(s.is_empty());
+    }
+
     #[test]
     fn test_hash() {
         use std::hash::{DefaultHasher, Hash, Hasher};
@@ -410,6 +421,7 @@ mod test {
         Span::new(0, 5).hash(&mut second);
         assert_eq!(first.finish(), second.finish());
     }
+
     #[test]
     fn test_eq() {
         assert_eq!(Span::new(0, 0), Span::new(0, 0));