diff --git a/mopro-core/src/middleware/gpu_explorations/arkworks_pippenger.rs b/mopro-core/src/middleware/gpu_explorations/arkworks_pippenger.rs
index 6bedadc5..18167784 100644
--- a/mopro-core/src/middleware/gpu_explorations/arkworks_pippenger.rs
+++ b/mopro-core/src/middleware/gpu_explorations/arkworks_pippenger.rs
@@ -1,7 +1,5 @@
-use ark_bn254::{Fr as ScalarField, G1Affine as GAffine, G1Projective as G};
-use ark_ec::{AffineRepr, VariableBaseMSM};
-use ark_ff::BigInt;
-use ark_serialize::CanonicalDeserialize;
+use ark_bn254::{Fr as ScalarField, G1Projective as G};
+use ark_ec::VariableBaseMSM;
 use std::time::{Duration, Instant};
 
 use crate::middleware::gpu_explorations::utils::{benchmark::BenchmarkResult, preprocess};
@@ -135,7 +133,7 @@ mod tests {
             "arkworks_pippenger"
         );
         let mut output_file = File::create(output_path).expect("output file creation failed");
-        writeln!(output_file, "msm_size,num_msm,avg_processing_time(ms)");
+        writeln!(output_file, "msm_size,num_msm,avg_processing_time(ms)").unwrap();
 
         let instance_size = vec![8, 12, 16, 18, 20, 22];
         let num_instance = vec![10];
@@ -154,7 +152,8 @@ mod tests {
                     output_file,
                     "{},{},{}",
                     result.instance_size, result.num_instance, result.avg_processing_time
-                );
+                )
+                .unwrap();
             }
         }
     }
diff --git a/mopro-core/src/middleware/gpu_explorations/metal/abstraction/limbs_conversion.rs b/mopro-core/src/middleware/gpu_explorations/metal/abstraction/limbs_conversion.rs
index ad7c410e..4c5f4493 100644
--- a/mopro-core/src/middleware/gpu_explorations/metal/abstraction/limbs_conversion.rs
+++ b/mopro-core/src/middleware/gpu_explorations/metal/abstraction/limbs_conversion.rs
@@ -1,4 +1,4 @@
-use ark_bn254::{Fq, FqConfig};
+use ark_bn254::Fq;
 use ark_ff::biginteger::{BigInteger, BigInteger256};
 
 use crate::middleware::gpu_explorations::metal::abstraction::mont_reduction;
diff --git a/mopro-core/src/middleware/gpu_explorations/metal/msm.rs b/mopro-core/src/middleware/gpu_explorations/metal/msm.rs
index 9266bdd0..3225c053 100644
--- a/mopro-core/src/middleware/gpu_explorations/metal/msm.rs
+++ b/mopro-core/src/middleware/gpu_explorations/metal/msm.rs
@@ -1,13 +1,9 @@
 use ark_bn254::{Fq, Fr as ScalarField, G1Affine as GAffine, G1Projective as G};
-use ark_ec::{AffineRepr, CurveGroup, Group, VariableBaseMSM};
-use ark_ff::{
-    biginteger::{BigInteger, BigInteger256},
-    PrimeField, UniformRand,
-};
+use ark_ec::{AffineRepr, Group, VariableBaseMSM};
+use ark_ff::PrimeField;
 use ark_std::{cfg_into_iter, vec::Vec, One, Zero};
 
 // For benchmarking
-use ark_serialize::CanonicalDeserialize;
 use std::time::{Duration, Instant};
 
 use crate::middleware::gpu_explorations::metal::abstraction::{
@@ -336,7 +332,7 @@ mod tests {
             "metal_msm"
         );
         let mut output_file = File::create(output_path).expect("output file creation failed");
-        writeln!(output_file, "msm_size,num_msm,avg_processing_time(ms)");
+        writeln!(output_file, "msm_size,num_msm,avg_processing_time(ms)").unwrap();
 
         let instance_size = vec![8, 12, 16, 18, 20, 22];
         let num_instance = vec![10];
@@ -355,7 +351,8 @@ mod tests {
                     output_file,
                     "{},{},{}",
                     result.instance_size, result.num_instance, result.avg_processing_time
-                );
+                )
+                .unwrap();
             }
         }
     }
diff --git a/mopro-core/src/middleware/gpu_explorations/metal/tests/test_bn254.rs b/mopro-core/src/middleware/gpu_explorations/metal/tests/test_bn254.rs
index 6c530c0a..c580d6fa 100644
--- a/mopro-core/src/middleware/gpu_explorations/metal/tests/test_bn254.rs
+++ b/mopro-core/src/middleware/gpu_explorations/metal/tests/test_bn254.rs
@@ -6,10 +6,7 @@ mod tests {
     };
 
     use ark_bn254::{Fq, G1Projective as G};
-    use ark_ff::{
-        biginteger::{BigInteger, BigInteger256},
-        BigInt, Field, PrimeField,
-    };
+    use ark_ff::{BigInt, Field};
     use ark_std::Zero;
 
     use metal::MTLSize;
@@ -342,7 +339,7 @@ mod tests {
         }
 
         prop_compose! {
-            fn rand_point()(n in any::<u8>()) -> G {
+            fn rand_point()(_n in any::<u8>()) -> G {
                 let rng = &mut thread_rng();
                 G::rand(rng)
             }
diff --git a/mopro-core/src/middleware/gpu_explorations/utils/preprocess.rs b/mopro-core/src/middleware/gpu_explorations/utils/preprocess.rs
index ce1b6754..8cae1865 100644
--- a/mopro-core/src/middleware/gpu_explorations/utils/preprocess.rs
+++ b/mopro-core/src/middleware/gpu_explorations/utils/preprocess.rs
@@ -1,10 +1,7 @@
-use ark_bn254::{Fr as ScalarField, G1Affine as GAffine, G1Projective as G};
-use ark_ff::{Field, PrimeField};
+use ark_bn254::{Fr as ScalarField, G1Affine as GAffine};
+use ark_ff::PrimeField;
 use ark_serialize::{CanonicalDeserialize, CanonicalSerialize, SerializationError};
-use ark_std::{
-    rand::{Rng, RngCore},
-    UniformRand,
-};
+use ark_std::{rand::RngCore, UniformRand};
 use std::collections::VecDeque;
 use std::fs::File;
 use thiserror::Error;