diff --git a/tests/assets/test_digital_assets.py b/tests/assets/test_digital_assets.py
index 9a37283..d202195 100644
--- a/tests/assets/test_digital_assets.py
+++ b/tests/assets/test_digital_assets.py
@@ -4,6 +4,7 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import pytest
+
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
 
diff --git a/tests/assets/test_divisible_assets.py b/tests/assets/test_divisible_assets.py
index f6718cd..5bd9978 100644
--- a/tests/assets/test_divisible_assets.py
+++ b/tests/assets/test_divisible_assets.py
@@ -5,7 +5,6 @@
 
 
 import pytest
-import random
 
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
diff --git a/tests/assets/test_zenroom_signing.py b/tests/assets/test_zenroom_signing.py
index eeebe64..922ba88 100644
--- a/tests/assets/test_zenroom_signing.py
+++ b/tests/assets/test_zenroom_signing.py
@@ -1,5 +1,6 @@
 import json
 import base58
+
 from hashlib import sha3_256
 from zenroom import zencode_exec
 from cryptoconditions.types.zenroom import ZenroomSha256
diff --git a/tests/backend/test_utils.py b/tests/backend/test_utils.py
index 7786165..0f62982 100644
--- a/tests/backend/test_utils.py
+++ b/tests/backend/test_utils.py
@@ -3,11 +3,11 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
+import pytest
+
 from functools import singledispatch
 from types import ModuleType
 
-import pytest
-
 
 @pytest.fixture
 def mock_module():
diff --git a/tests/commands/conftest.py b/tests/commands/conftest.py
index 2fd8028..3552b6e 100644
--- a/tests/commands/conftest.py
+++ b/tests/commands/conftest.py
@@ -3,9 +3,9 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-from argparse import Namespace
 import pytest
 
+from argparse import Namespace
 from planetmint.config import Config
 
 
diff --git a/tests/commands/test_commands.py b/tests/commands/test_commands.py
index 4b9e3df..87dbe70 100644
--- a/tests/commands/test_commands.py
+++ b/tests/commands/test_commands.py
@@ -5,18 +5,15 @@
 
 import json
 import logging
+import pytest
 
 from unittest.mock import Mock, patch
 from argparse import Namespace
-
-import pytest
-
 from planetmint.config import Config
 from planetmint import ValidatorElection
 from planetmint.commands.planetmint import run_election_show
 from planetmint.lib import Block
 from transactions.types.elections.chain_migration_election import ChainMigrationElection
-
 from tests.utils import generate_election, generate_validators
 
 
diff --git a/tests/commands/test_utils.py b/tests/commands/test_utils.py
index a731f66..f1e208a 100644
--- a/tests/commands/test_utils.py
+++ b/tests/commands/test_utils.py
@@ -4,10 +4,10 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import argparse
-from argparse import Namespace
 import logging
-
 import pytest
+
+from argparse import Namespace
 from planetmint.config import Config
 from unittest.mock import patch
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 5837bfa..b9acaa0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,17 +14,14 @@ import os
 import random
 import tempfile
 import codecs
+import pytest
+
 from ipld import marshal, multihash
 from collections import namedtuple
 from logging import getLogger
 from logging.config import dictConfig
 from planetmint.backend.connection import connect
 from planetmint.backend.tarantool.connection import TarantoolDBConnection
-
-import pytest
-
-# from pymongo import MongoClient
-
 from transactions.common import crypto
 from transactions.common.transaction_mode_types import BROADCAST_TX_COMMIT
 from planetmint.tendermint_utils import key_from_base64
@@ -35,7 +32,6 @@ from planetmint.lib import Block
 from tests.utils import gen_vote
 from planetmint.config import Config
 from transactions.types.elections.validator_election import ValidatorElection  # noqa
-
 from tendermint.abci import types_pb2 as types
 from tendermint.crypto import keys_pb2
 
diff --git a/tests/db/test_planetmint_api.py b/tests/db/test_planetmint_api.py
index 6c67e15..8f32206 100644
--- a/tests/db/test_planetmint_api.py
+++ b/tests/db/test_planetmint_api.py
@@ -3,13 +3,15 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 import warnings
+import random
+import pytest
+
 from unittest.mock import patch
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
 from ipld import marshal, multihash
-import pytest
 from base58 import b58decode
-import random
+
 
 pytestmark = pytest.mark.bdb
 
diff --git a/tests/elections/test_election.py b/tests/elections/test_election.py
index 63626e3..d0461e4 100644
--- a/tests/elections/test_election.py
+++ b/tests/elections/test_election.py
@@ -1,7 +1,6 @@
 import pytest
 
 from tests.utils import generate_election, generate_validators
-
 from planetmint.lib import Block
 from transactions.types.elections.election import Election
 from transactions.types.elections.chain_migration_election import ChainMigrationElection
diff --git a/tests/tendermint/test_core.py b/tests/tendermint/test_core.py
index caa6c6a..7268734 100644
--- a/tests/tendermint/test_core.py
+++ b/tests/tendermint/test_core.py
@@ -8,13 +8,13 @@ import random
 import multiprocessing as mp
 
 import pytest
+
 from tendermint.abci import types_pb2 as types
 from tendermint.crypto import keys_pb2
 from transactions import ValidatorElection, ChainMigrationElection
 from transactions.common.crypto import generate_key_pair
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
-
 from planetmint import App
 from planetmint.backend import query
 from planetmint.core import OkCode, CodeTypeError, rollback
@@ -22,7 +22,6 @@ from planetmint.lib import Block
 from planetmint.tendermint_utils import new_validator_set
 from planetmint.tendermint_utils import public_key_to_base64
 from planetmint.version import __tm_supported_versions__
-
 from tests.utils import generate_election, generate_validators
 
 pytestmark = pytest.mark.bdb
diff --git a/tests/tendermint/test_integration.py b/tests/tendermint/test_integration.py
index 77f2f2f..c5b5fc0 100644
--- a/tests/tendermint/test_integration.py
+++ b/tests/tendermint/test_integration.py
@@ -4,17 +4,14 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import codecs
-from transactions.types.assets.create import Create
-from transactions.types.assets.transfer import Transfer
-
-from tendermint.abci import types_pb2 as types
 import json
 import pytest
 
-
+from transactions.types.assets.create import Create
+from transactions.types.assets.transfer import Transfer
+from tendermint.abci import types_pb2 as types
 from abci.server import ProtocolHandler
 from abci.utils import read_messages
-
 from transactions.common.transaction_mode_types import BROADCAST_TX_COMMIT, BROADCAST_TX_SYNC
 from planetmint.version import __tm_supported_versions__
 from io import BytesIO
diff --git a/tests/tendermint/test_lib.py b/tests/tendermint/test_lib.py
index 298f1ad..4a2338a 100644
--- a/tests/tendermint/test_lib.py
+++ b/tests/tendermint/test_lib.py
@@ -3,17 +3,16 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-from operator import index
+
 import os
+import pytest
+
 from unittest.mock import patch
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
-
+from operator import index
 from hashlib import sha3_256
-
-import pytest
 from pymongo import MongoClient
-
 from planetmint import backend
 from transactions.common.transaction_mode_types import (
     BROADCAST_TX_COMMIT,
diff --git a/tests/tendermint/test_utils.py b/tests/tendermint/test_utils.py
index c6cfd45..d393685 100644
--- a/tests/tendermint/test_utils.py
+++ b/tests/tendermint/test_utils.py
@@ -5,8 +5,8 @@
 
 import base64
 import json
-from pytest import mark
 
+from pytest import mark
 from hashlib import sha3_256
 
 
diff --git a/tests/test_config_utils.py b/tests/test_config_utils.py
index 406e46c..f537830 100644
--- a/tests/test_config_utils.py
+++ b/tests/test_config_utils.py
@@ -3,12 +3,10 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-import copy
-from unittest.mock import mock_open, patch
-
 import pytest
-
 import planetmint
+
+from unittest.mock import mock_open, patch
 from planetmint.config import Config
 
 
diff --git a/tests/test_core.py b/tests/test_core.py
index 6d43cc6..0de8c5b 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -4,6 +4,7 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import pytest
+
 from planetmint.version import __tm_supported_versions__
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
diff --git a/tests/test_docs.py b/tests/test_docs.py
index 40dd90f..b05c8cb 100644
--- a/tests/test_docs.py
+++ b/tests/test_docs.py
@@ -3,9 +3,7 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-
 import subprocess
-import os
 
 
 def test_build_root_docs():
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 68cbacb..3e3979f 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -4,10 +4,10 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import queue
-from unittest.mock import patch, call
-
 import pytest
 
+from unittest.mock import patch, call
+
 
 @pytest.fixture
 def mock_queue(monkeypatch):
diff --git a/tests/upsert_validator/conftest.py b/tests/upsert_validator/conftest.py
index 9bfafa3..4946bc3 100644
--- a/tests/upsert_validator/conftest.py
+++ b/tests/upsert_validator/conftest.py
@@ -2,10 +2,10 @@
 # Planetmint and IPDB software contributors.
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
-from unittest.mock import patch
 
 import pytest
 
+from unittest.mock import patch
 from planetmint.backend import query
 from transactions.types.elections.validator_election import ValidatorElection
 
diff --git a/tests/upsert_validator/test_validator_election.py b/tests/upsert_validator/test_validator_election.py
index 6c9b39a..31a9fc3 100644
--- a/tests/upsert_validator/test_validator_election.py
+++ b/tests/upsert_validator/test_validator_election.py
@@ -2,11 +2,11 @@
 # Planetmint and IPDB software contributors.
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
-from argparse import Namespace
-from unittest.mock import patch
 
 import pytest
 
+from argparse import Namespace
+from unittest.mock import patch
 from planetmint.tendermint_utils import public_key_to_base64
 from transactions.types.elections.validator_election import ValidatorElection
 from transactions.common.exceptions import (
diff --git a/tests/utils.py b/tests/utils.py
index 5d2a47b..d1fa756 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -8,7 +8,6 @@ import base64
 import random
 
 from functools import singledispatch
-
 from planetmint.backend.localmongodb.connection import LocalMongoDBConnection
 from planetmint.backend.tarantool.connection import TarantoolDBConnection
 from planetmint.backend.schema import TABLES, SPACE_NAMES
diff --git a/tests/validation/test_transaction_structure.py b/tests/validation/test_transaction_structure.py
index 0efb4e4..6817c75 100644
--- a/tests/validation/test_transaction_structure.py
+++ b/tests/validation/test_transaction_structure.py
@@ -8,12 +8,10 @@ structural / schematic issues are caught when reading a transaction
 (ie going from dict -> transaction).
 """
 import json
-
 import pytest
-
 import hashlib as sha3
-from unittest.mock import MagicMock
 
+from unittest.mock import MagicMock
 from transactions.common.exceptions import AmountError, SchemaValidationError, ThresholdTooDeep
 from transactions.common.transaction import Transaction
 from transactions.common.utils import _fulfillment_to_details, _fulfillment_from_details
diff --git a/tests/web/test_assets.py b/tests/web/test_assets.py
index 5e0760c..93a7598 100644
--- a/tests/web/test_assets.py
+++ b/tests/web/test_assets.py
@@ -4,6 +4,7 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import pytest
+
 from transactions.types.assets.create import Create
 from ipld import marshal, multihash
 
diff --git a/tests/web/test_metadata.py b/tests/web/test_metadata.py
index 302b301..8c79f49 100644
--- a/tests/web/test_metadata.py
+++ b/tests/web/test_metadata.py
@@ -4,6 +4,7 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import pytest
+
 from transactions.types.assets.create import Create
 from ipld import marshal, multihash
 
diff --git a/tests/web/test_outputs.py b/tests/web/test_outputs.py
index 29e6e18..6909116 100644
--- a/tests/web/test_outputs.py
+++ b/tests/web/test_outputs.py
@@ -3,8 +3,8 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-
 import pytest
+
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
 from unittest.mock import MagicMock, patch
diff --git a/tests/web/test_transactions.py b/tests/web/test_transactions.py
index 1491d7c..8077b71 100644
--- a/tests/web/test_transactions.py
+++ b/tests/web/test_transactions.py
@@ -4,15 +4,13 @@
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
 import json
-from unittest.mock import Mock, patch
-
 import base58
 import pytest
+
+from unittest.mock import Mock, patch
 from cryptoconditions import Ed25519Sha256
 from ipld import multihash, marshal
-
 from hashlib import sha3_256
-
 from transactions.common import crypto
 from transactions.common.transaction import Transaction
 from transactions.types.assets.create import Create
diff --git a/tests/web/test_websocket_server.py b/tests/web/test_websocket_server.py
index 7e61231..49405e8 100644
--- a/tests/web/test_websocket_server.py
+++ b/tests/web/test_websocket_server.py
@@ -7,15 +7,13 @@ import asyncio
 import json
 import queue
 import threading
+import pytest
 
 # from unittest.mock import patch
 from transactions.types.assets.create import Create
 from transactions.types.assets.transfer import Transfer
 from ipld import multihash, marshal
 
-import pytest
-
-
 class MockWebSocket:
     def __init__(self):
         self.received = []