diff --git a/src/gadgets/arithmetic_extension.rs b/src/gadgets/arithmetic_extension.rs
index de608be5..af838ab6 100644
--- a/src/gadgets/arithmetic_extension.rs
+++ b/src/gadgets/arithmetic_extension.rs
@@ -510,7 +510,6 @@ mod tests {
     use crate::plonk::circuit_builder::CircuitBuilder;
     use crate::plonk::circuit_data::CircuitConfig;
     use crate::plonk::verifier::verify;
-    use crate::util::serialization::Buffer;
 
     #[test]
     fn test_mul_many() -> Result<()> {
@@ -584,7 +583,7 @@ mod tests {
         let config = CircuitConfig::large_config();
 
         let pw = PartialWitness::new();
-        let mut builder = CircuitBuilder::<F, D>::new(config.clone());
+        let mut builder = CircuitBuilder::<F, D>::new(config);
 
         let x = FF::rand_vec(4);
         let y = FF::rand_vec(4);
@@ -603,13 +602,6 @@ mod tests {
         let data = builder.build();
         let proof = data.prove(pw)?;
 
-        let mut buffer = Buffer::new(Vec::new());
-        buffer.write_proof(&proof.proof).unwrap();
-        dbg!(buffer.len());
-        let mut buffer = Buffer::new(buffer.bytes());
-        let oproof = buffer.read_proof(&data.common, &config).unwrap();
-        assert_eq!(proof.proof, oproof);
-
         verify(proof, &data.verifier_only, &data.common)
     }
 }