diff --git a/signature_gen/.DS_Store b/signature_gen/.DS_Store
deleted file mode 100644
index 6d64501..0000000
Binary files a/signature_gen/.DS_Store and /dev/null differ
diff --git a/signature_gen/src/main.rs b/signature_gen/src/main.rs
index afa0ff9..5f8419c 100644
--- a/signature_gen/src/main.rs
+++ b/signature_gen/src/main.rs
@@ -1,12 +1,9 @@
 use num_bigint::BigUint;
 use rsa::pkcs1v15::Signature;
-use rsa::pkcs1v15::VerifyingKey;
 use rsa::{RsaPrivateKey, RsaPublicKey};
-use std::env;
 use toml::Value;
 
-use rand;
-use rsa::signature::{SignatureEncoding, Signer, Verifier};
+use rsa::signature::{SignatureEncoding, Signer};
 use rsa::traits::PublicKeyParts;
 use sha2::{Digest, Sha256};
 
@@ -45,7 +42,8 @@ fn generate_2048_bit_signature_parameters(msg: &str, as_toml: bool, exponent: u3
     let mut rng: rand::prelude::ThreadRng = rand::thread_rng();
     let bits: usize = 2048;
     let priv_key: RsaPrivateKey =
-        RsaPrivateKey::new_with_exp(&mut rng, bits, &BigUint::from(exponent)).expect("failed to generate a key");
+        RsaPrivateKey::new_with_exp(&mut rng, bits, &BigUint::from(exponent))
+            .expect("failed to generate a key");
     let pub_key: RsaPublicKey = priv_key.clone().into();
 
     let signing_key = rsa::pkcs1v15::SigningKey::<Sha256>::new(priv_key);
@@ -64,8 +62,6 @@ fn generate_2048_bit_signature_parameters(msg: &str, as_toml: bool, exponent: u3
     );
 
     if as_toml {
-        let hash_toml = toml::to_vec(&hashed_as_bytes).unwrap();
-
         let sig_limbs = split_into_120_bit_limbs(&sig_uint.clone(), 2048);
         let signature_toml = Value::Array(format_limbs_as_toml_value(&sig_limbs));
 
@@ -125,24 +121,30 @@ fn main() {
     generate_2048_bit_signature_parameters(msg, as_toml, e);
 }
 
-fn test_signature_generation_impl() {
-    let mut rng = rand::thread_rng();
-    let bits = 2048;
-    let priv_key = RsaPrivateKey::new(&mut rng, bits).expect("failed to generate a key");
-    let pub_key: RsaPublicKey = priv_key.clone().into();
-    let text: &str = "hello world";
-    let signing_key = rsa::pkcs1v15::SigningKey::<Sha256>::new(priv_key);
-    let sig: Vec<u8> = signing_key.sign(text.as_bytes()).to_vec();
-    let verifying_key = VerifyingKey::<Sha256>::new(pub_key);
-
-    let result = verifying_key.verify(
-        text.as_bytes(),
-        &Signature::try_from(sig.as_slice()).unwrap(),
-    );
-    result.expect("failed to verify");
-}
-
-#[test]
-fn test_signature_generation() {
-    test_signature_generation_impl();
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use rand::thread_rng;
+    use rsa::pkcs1v15::Signature;
+    use rsa::signature::{Signer, Verifier};
+    use rsa::{pkcs1v15::VerifyingKey, RsaPrivateKey, RsaPublicKey};
+    use sha2::Sha256;
+
+    #[test]
+    fn test_signature_generation() {
+        let mut rng = thread_rng();
+        let bits = 2048;
+        let priv_key = RsaPrivateKey::new(&mut rng, bits).expect("failed to generate a key");
+        let pub_key: RsaPublicKey = priv_key.clone().into();
+        let text: &str = "hello world";
+        let signing_key = rsa::pkcs1v15::SigningKey::<Sha256>::new(priv_key);
+        let sig: Vec<u8> = signing_key.sign(text.as_bytes()).to_vec();
+        let verifying_key = VerifyingKey::<Sha256>::new(pub_key);
+
+        let result = verifying_key.verify(
+            text.as_bytes(),
+            &Signature::try_from(sig.as_slice()).unwrap(),
+        );
+        result.expect("failed to verify");
+    }
 }