diff --git a/src/circuit_tests/mod.rs b/src/circuit_tests/mod.rs
index 9f54895..f37f905 100644
--- a/src/circuit_tests/mod.rs
+++ b/src/circuit_tests/mod.rs
@@ -1,74 +1,74 @@
 pub mod utils;
 
-use ark_bn254::Bn254;
-use ark_circom::{CircomBuilder, CircomConfig};
-use ark_groth16::{
-    create_random_proof as prove, generate_random_parameters, prepare_inputs,
-    prepare_verifying_key, verify_proof_with_prepared_inputs, ProvingKey,
-};
-use ark_std::rand::rngs::ThreadRng;
-use ruint::aliases::U256;
-
-pub struct CircuitsTests {
-    builder: CircomBuilder<Bn254>,
-    params: ProvingKey<Bn254>,
-    rng: ThreadRng,
-}
-
-impl CircuitsTests {
-    pub fn new(wtns: String, r1cs: String) -> CircuitsTests {
-        let mut rng = ThreadRng::default();
-        let builder = CircomBuilder::new(CircomConfig::<Bn254>::new(wtns, r1cs).unwrap());
-        let params = generate_random_parameters::<Bn254, _, _>(builder.setup(), &mut rng).unwrap();
-
-        CircuitsTests {
-            builder,
-            params,
-            rng,
-        }
-    }
-
-    pub fn poseidon_hash(&mut self, elements: &[U256], hash: U256) {
-        let mut builder = self.builder.clone();
-
-        elements.iter().for_each(|c| builder.push_input("in", *c));
-        builder.push_input("hash", hash);
-
-        let circuit = builder.build().unwrap();
-        let inputs = circuit.get_public_inputs().unwrap();
-        let proof = prove(circuit, &self.params, &mut self.rng).unwrap();
-        let vk = prepare_verifying_key(&self.params.vk);
-        let public_inputs = prepare_inputs(&vk, &inputs).unwrap();
-
-        assert!(verify_proof_with_prepared_inputs(&vk, &proof, &public_inputs).is_ok());
-    }
-
-    pub fn poseidon_digest(&mut self, elements: &[U256], hash: U256) {
-        let mut builder = self.builder.clone();
-
-        elements
-            .iter()
-            .for_each(|c| builder.push_input("block", *c));
-        builder.push_input("hash", hash);
-
-        let circuit = builder.build().unwrap();
-        let inputs = circuit.get_public_inputs().unwrap();
-        let proof = prove(circuit, &self.params, &mut self.rng).unwrap();
-        let vk = prepare_verifying_key(&self.params.vk);
-        let public_inputs = prepare_inputs(&vk, &inputs).unwrap();
-
-        assert!(verify_proof_with_prepared_inputs(&vk, &proof, &public_inputs).is_ok());
-    }
-}
-
 #[cfg(test)]
 mod test {
-    use super::CircuitsTests;
+    use ark_bn254::Bn254;
+    use ark_circom::{CircomBuilder, CircomConfig};
+    use ark_groth16::{
+        create_random_proof as prove, generate_random_parameters, prepare_inputs,
+        prepare_verifying_key, verify_proof_with_prepared_inputs, ProvingKey,
+    };
+    use ark_std::rand::{distributions::Alphanumeric, rngs::ThreadRng, Rng};
+    use ruint::aliases::U256;
+
     use crate::{
-        circuit_tests::utils::digest, circuit_tests::utils::merkelize, poseidon::hash,
+        circuit_tests::utils::{digest, merkelize},
+        poseidon::hash,
         storage_proofs::StorageProofs,
     };
-    use ruint::aliases::U256;
+
+    pub struct CircuitsTests {
+        builder: CircomBuilder<Bn254>,
+        params: ProvingKey<Bn254>,
+        rng: ThreadRng,
+    }
+
+    impl CircuitsTests {
+        pub fn new(wtns: String, r1cs: String) -> CircuitsTests {
+            let mut rng = ThreadRng::default();
+            let builder = CircomBuilder::new(CircomConfig::<Bn254>::new(wtns, r1cs).unwrap());
+            let params =
+                generate_random_parameters::<Bn254, _, _>(builder.setup(), &mut rng).unwrap();
+
+            CircuitsTests {
+                builder,
+                params,
+                rng,
+            }
+        }
+
+        pub fn poseidon_hash(&mut self, elements: &[U256], hash: U256) -> bool {
+            let mut builder = self.builder.clone();
+
+            elements.iter().for_each(|c| builder.push_input("in", *c));
+            builder.push_input("hash", hash);
+
+            let circuit = builder.build().unwrap();
+            let inputs = circuit.get_public_inputs().unwrap();
+            let proof = prove(circuit, &self.params, &mut self.rng).unwrap();
+            let vk = prepare_verifying_key(&self.params.vk);
+            let public_inputs = prepare_inputs(&vk, &inputs).unwrap();
+            verify_proof_with_prepared_inputs(&vk, &proof, &public_inputs).is_ok()
+        }
+
+        pub fn poseidon_digest(&mut self, elements: &[U256], hash: U256) -> bool {
+            let mut builder = self.builder.clone();
+
+            elements
+                .iter()
+                .for_each(|c| builder.push_input("block", *c));
+            builder.push_input("hash", hash);
+
+            let circuit = builder.build().unwrap();
+            let inputs = circuit.get_public_inputs().unwrap();
+
+            let proof = prove(circuit, &self.params, &mut self.rng).unwrap();
+            let vk = prepare_verifying_key(&self.params.vk);
+            let public_inputs = prepare_inputs(&vk, &inputs).unwrap();
+
+            verify_proof_with_prepared_inputs(&vk, &proof, &public_inputs).is_ok()
+        }
+    }
 
     #[test]
     fn test_poseidon_hash() {
@@ -76,7 +76,7 @@ mod test {
         let wasm = "./src/circuit_tests/artifacts/poseidon-hash-test_js/poseidon-hash-test.wasm";
 
         let mut hasher = CircuitsTests::new(wasm.to_string(), r1cs.to_string());
-        hasher.poseidon_hash(&[U256::from(1)], hash(&[U256::from(1)]));
+        assert!(hasher.poseidon_hash(&[U256::from(1)], hash(&[U256::from(1)])));
     }
 
     #[test]
@@ -86,17 +86,26 @@ mod test {
             "./src/circuit_tests/artifacts/poseidon-digest-test_js/poseidon-digest-test.wasm";
 
         let mut hasher = CircuitsTests::new(wasm.to_string(), r1cs.to_string());
-        let input: Vec<U256> = (0..256).map(|_| U256::from(1)).collect();
-        hasher.poseidon_digest(&input, digest(&input, Some(16)));
+        let input: Vec<U256> = (0..256).map(|c| U256::from(c)).collect();
+        assert!(hasher.poseidon_digest(&input, digest(&input, Some(16))));
     }
 
     #[test]
     fn test_storer() {
+        let r1cs = "./src/circuit_tests/artifacts/storer-test.r1cs";
+        let wasm = "./src/circuit_tests/artifacts/storer-test_js/storer-test.wasm";
+        let mut prover = StorageProofs::new(wasm.to_string(), r1cs.to_string(), None);
+
         // generate a tuple of (preimages, hash), where preimages is a vector of 256 U256s
         // and hash is the hash of each vector generated using the digest function
         let data = (0..4)
             .map(|_| {
-                let preimages: Vec<U256> = (0..256).map(|_| U256::from(1)).collect();
+                let rng = ThreadRng::default();
+                let preimages: Vec<U256> = rng
+                    .sample_iter(Alphanumeric)
+                    .take(256)
+                    .map(|c| U256::from(c))
+                    .collect();
                 let hash = digest(&preimages, Some(16));
                 (preimages, hash)
             })
@@ -112,7 +121,7 @@ mod test {
         let siblings = &[
             hashes[1],
             parent_hash_r,
-            hashes[1],
+            hashes[0],
             parent_hash_r,
             hashes[3],
             parent_hash_l,
@@ -120,9 +129,8 @@ mod test {
             parent_hash_l,
         ];
 
-        let r1cs = "./src/circuit_tests/artifacts/storer-test.r1cs";
-        let wasm = "./src/circuit_tests/artifacts/storer-test_js/storer-test.wasm";
-        let mut prover = StorageProofs::new(wasm.to_string(), r1cs.to_string(), None);
+        println!("hashes: {:?}", hashes);
+        println!("siblings: {:?}", siblings);
 
         let root = merkelize(hashes.as_slice());
         let proof_bytes = &mut Vec::new();
diff --git a/src/circuit_tests/utils.rs b/src/circuit_tests/utils.rs
index a8faf69..4899b51 100644
--- a/src/circuit_tests/utils.rs
+++ b/src/circuit_tests/utils.rs
@@ -37,8 +37,7 @@ pub fn merkelize(leafs: &[U256]) -> U256 {
         }
 
         if merkle.len() % 2 == 1 {
-            new_merkle
-                .push(hash(&[merkle[merkle.len() - 2], merkle[merkle.len() - 2]]));
+            new_merkle.push(hash(&[merkle[merkle.len() - 2], merkle[merkle.len() - 2]]));
         }
 
         merkle = new_merkle;