diff --git a/invalidstring/src/lib.rs b/invalidstring/src/lib.rs
index 9d245997..99415dcf 100644
--- a/invalidstring/src/lib.rs
+++ b/invalidstring/src/lib.rs
@@ -3,6 +3,6 @@ pub fn invalid_utf8(prefix: &str) -> String {
 	let bytes = b"\xc3\x73";
 
 	unsafe {
-		format!("{}{}", prefix, std::str::from_utf8_unchecked(bytes))
+		format!("{prefix}{}", std::str::from_utf8_unchecked(bytes))
 	}
 }