diff --git a/benches/engine.rs b/benches/engine.rs
index 1b04cd26..254288de 100644
--- a/benches/engine.rs
+++ b/benches/engine.rs
@@ -34,7 +34,7 @@ fn bench_engine_register_fn(bench: &mut Bencher) {
     }
 
     bench.iter(|| {
-        let mut engine = Engine::new();
+        let mut engine = Engine::new_raw();
         engine.register_fn("hello", hello);
     });
 }
diff --git a/benches/primes.rs b/benches/primes.rs
index 7fe3451d..1b1b022b 100644
--- a/benches/primes.rs
+++ b/benches/primes.rs
@@ -9,8 +9,6 @@ use test::Bencher;
 // This script uses the Sieve of Eratosthenes to calculate prime numbers.
 
 const SCRIPT: &str = r#"
-let now = timestamp();
-
 const MAX_NUMBER_TO_CHECK = 1_000;     // 168 primes <= 1000
 
 let prime_mask = [];