diff --git a/tools/website-test/build.rs b/tools/website-test/build.rs
index e8bb565bfec..8620d1100c1 100644
--- a/tools/website-test/build.rs
+++ b/tools/website-test/build.rs
@@ -62,7 +62,7 @@ impl Level {
 
     fn write_into(&self, dst: &mut String, name: &str, level: usize) -> fmt::Result {
         self.write_space(dst, level);
-        let name = name.replace(&['-', '.'], "_");
+        let name = name.replace(['-', '.'], "_");
         writeln!(dst, "pub mod {name} {{")?;
 
         self.write_inner(dst, level + 1)?;