diff --git a/src/lib.rs b/src/lib.rs
index 9d73013..bbf790d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -56,13 +56,11 @@ pub mod test_util {
         pub fn get_filename(track: i32) -> String {
             const FLAC_EXTENSION: &str = ".flac";
 
-            let filename = if track < 10 {
-                format!("track0{}{}", track, FLAC_EXTENSION)
+            if track < 10 {
+                format!("track0{track}{FLAC_EXTENSION}")
             } else {
-                format!("track{}{}", track, FLAC_EXTENSION)
-            };
-
-            filename
+                format!("track{track}{FLAC_EXTENSION}")
+            }
         }
     }
 }