diff --git a/src/tools.rs b/src/tools.rs
index 722cdb7..40ac4ee 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -242,7 +242,7 @@ mod tests {
 
     use primitive_types::U256;
 
-    use crate::static_values::BEGINNING_DIFFICULTY;
+    
 
     use super::{dump_u256, load_u256, recalculate_difficulty};
 
diff --git a/tests/block_test.rs b/tests/block_test.rs
index 150ee4f..7fce1fe 100644
--- a/tests/block_test.rs
+++ b/tests/block_test.rs
@@ -171,7 +171,7 @@ fn dump_parse_derivative_block() {
         payment_transaction,
     };
     let dumped_block = derivative_block.dump().unwrap();
-    let parsed_block = DerivativeBlock::parse(&dumped_block[1..].to_vec()).unwrap();
+    let parsed_block = DerivativeBlock::parse(&dumped_block[1..]).unwrap();
 
     assert_eq!(
         derivative_block.default_info.timestamp,
@@ -216,7 +216,7 @@ fn validate_derivative_block() {
     };
     let prev_block = DerivativeBlock {
         default_info: basic_data,
-        payment_transaction: payment_transaction,
+        payment_transaction,
     };
     let payment_transaction = [0; 32];
     let basic_data = block::BasicInfo {
@@ -229,7 +229,7 @@ fn validate_derivative_block() {
     };
     let derivative_block = DerivativeBlock {
         default_info: basic_data,
-        payment_transaction: payment_transaction,
+        payment_transaction,
     };
 
     assert!(!derivative_block
diff --git a/tests/chain_test.rs b/tests/chain_test.rs
index aea8311..e684fba 100644
--- a/tests/chain_test.rs
+++ b/tests/chain_test.rs
@@ -1,7 +1,6 @@
 use blockchaintree::{
     block,
-    chain::{self, Chain, DerivativeChain},
-    static_values::{BEGINNING_DIFFICULTY, INCEPTION_TIMESTAMP, ROOT_PUBLIC_ADDRESS},
+    chain::{self, Chain},
     tools,
     transaction::{self, Transactionable},
 };