diff --git a/tests/instructions/extcodehash_test.py b/tests/instructions/extcodehash_test.py
index e4586285..c677d5ef 100644
--- a/tests/instructions/extcodehash_test.py
+++ b/tests/instructions/extcodehash_test.py
@@ -11,12 +11,13 @@ from mythril.support.support_utils import get_code_hash
 
 from mythril.laser.smt import symbol_factory
 
+
 def test_extcodehash_concrete():
     # Arrange
     world_state = WorldState()
     account = world_state.create_account(balance=10, address=101)
     account.code = Disassembly("60606040")
-    world_state.create_account(balance = 10, address = 1000)
+    world_state.create_account(balance=10, address=1000)
     environment = Environment(account, None, None, None, None, None)
     og_state = GlobalState(
         world_state, environment, None, MachineState(gas_limit=8000000)
@@ -24,9 +25,9 @@ def test_extcodehash_concrete():
     og_state.transaction_stack.append(
         (MessageCallTransaction(world_state=WorldState(), gas_limit=8000000), None)
     )
-    
+
     instruction = Instruction("extcodehash", dynamic_loader=None)
-    
+
     # If account does not exist, return 0
     og_state.mstate.stack = [symbol_factory.BitVecVal(1, 256)]
     new_state = instruction.evaluate(og_state)[0]
@@ -35,9 +36,12 @@ def test_extcodehash_concrete():
     # If account code does not exist, return hash of empty set.
     og_state.mstate.stack = [symbol_factory.BitVecVal(1000, 256)]
     new_state = instruction.evaluate(og_state)[0]
-    assert new_state.mstate.stack[-1] == '0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
+    assert (
+        new_state.mstate.stack[-1]
+        == "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
+    )
 
     # If account code exists, return hash of the code.
     og_state.mstate.stack = [symbol_factory.BitVecVal(101, 256)]
     new_state = instruction.evaluate(og_state)[0]
-    assert new_state.mstate.stack[-1] == get_code_hash("60606040")
\ No newline at end of file
+    assert new_state.mstate.stack[-1] == get_code_hash("60606040")