diff --git a/pyproject.toml b/pyproject.toml
index 2a219a6e..ea0cc143 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -106,3 +106,4 @@ lint.select = [
 ]
 
 lint.isort.required-imports = ["from __future__ import annotations"]
+lint.isort.known-first-party = ["monty"]
diff --git a/tests/test_json.py b/tests/test_json.py
index 097f1f53..055c8428 100644
--- a/tests/test_json.py
+++ b/tests/test_json.py
@@ -9,6 +9,17 @@
 from typing import Union
 
 import numpy as np
+import pytest
+from monty.json import (
+    MontyDecoder,
+    MontyEncoder,
+    MSONable,
+    _load_redirect,
+    jsanitize,
+    load,
+)
+
+from . import __version__ as TESTS_VERSION
 
 try:
     import pandas as pd
@@ -35,18 +46,6 @@
 except ImportError:
     ObjectId = None
 
-import pytest
-from monty.json import (
-    MontyDecoder,
-    MontyEncoder,
-    MSONable,
-    _load_redirect,
-    jsanitize,
-    load,
-)
-
-from . import __version__ as tests_version
-
 TEST_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "test_files")
 
 
@@ -317,7 +316,7 @@ def test_unsafe_hash(self):
     def test_version(self):
         obj = self.good_cls("Hello", "World", "Python")
         d = obj.as_dict()
-        assert d["@version"] == tests_version
+        assert d["@version"] == TESTS_VERSION
 
     def test_nested_to_from_dict(self):
         GMC = GoodMSONClass
diff --git a/tests/test_serialization.py b/tests/test_serialization.py
index d2e0cf9c..6d1e8ab9 100644
--- a/tests/test_serialization.py
+++ b/tests/test_serialization.py
@@ -6,15 +6,14 @@
 import unittest
 
 import pytest
+from monty.serialization import dumpfn, loadfn
+from monty.tempfile import ScratchDir
 
 try:
     import msgpack
 except ImportError:
     msgpack = None
 
-from monty.serialization import dumpfn, loadfn
-from monty.tempfile import ScratchDir
-
 
 class TestSerial:
     @classmethod