diff --git a/evm/src/cpu/kernel/interpreter.rs b/evm/src/cpu/kernel/interpreter.rs
index 70b65ee1..e53b4cae 100644
--- a/evm/src/cpu/kernel/interpreter.rs
+++ b/evm/src/cpu/kernel/interpreter.rs
@@ -118,7 +118,7 @@ impl<'a> Interpreter<'a> {
         let mut tot = 0;
         for i in 0..0x100 {
             if self.opcode_count[i] > 0 {
-                tot = tot + self.opcode_count[i];
+                tot += self.opcode_count[i];
                 println!("{}: {}", get_mnemonic(i as u8), self.opcode_count[i])
             }
         }
diff --git a/evm/src/cpu/kernel/tests/fields.rs b/evm/src/cpu/kernel/tests/fields.rs
index 6afe3064..70d339e9 100644
--- a/evm/src/cpu/kernel/tests/fields.rs
+++ b/evm/src/cpu/kernel/tests/fields.rs
@@ -162,7 +162,7 @@ fn make_initial_stack(
     input.extend(vec![in1]);
     input.extend(f1);
     input.extend(g0);
-    input.extend(vec![U256::from(in2)]);
+    input.extend(vec![in2]);
     input.extend(g1);
     input.extend(vec![in2, out, in1]);
     input.reverse();