diff --git a/benches/benchmarks.rs b/benches/benchmarks.rs
index b656e09858..913c87e899 100644
--- a/benches/benchmarks.rs
+++ b/benches/benchmarks.rs
@@ -145,7 +145,7 @@ mod record {
     fn create_nested_record_string(depth: i32) -> String {
         let mut s = String::from("let record = {");
         for _ in 0..depth {
-            s.push_str("col: {{");
+            s.push_str("col: {");
         }
         s.push_str("col_final: 0");
         for _ in 0..depth {