diff --git a/django_migration_linter/constants.py b/django_migration_linter/constants.py
index d0492ff..c7dd3eb 100644
--- a/django_migration_linter/constants.py
+++ b/django_migration_linter/constants.py
@@ -3,3 +3,6 @@ from appdirs import user_cache_dir
 __version__ = "1.5.0"
 
 DEFAULT_CACHE_PATH = user_cache_dir("django-migration-linter", version=__version__)
+
+DJANGO_APPS_WITH_MIGRATIONS = ("admin", "auth", "contenttypes", "sessions")
+EXPECTED_DATA_MIGRATION_ARGS = ("apps", "schema_editor")
diff --git a/django_migration_linter/migration_linter.py b/django_migration_linter/migration_linter.py
index 132ed77..8a472fb 100644
--- a/django_migration_linter/migration_linter.py
+++ b/django_migration_linter/migration_linter.py
@@ -5,7 +5,6 @@ import inspect
 import logging
 import os
 import re
-from collections import defaultdict
 from subprocess import Popen, PIPE
 
 from django.conf import settings
@@ -14,16 +13,13 @@ from django.db import DEFAULT_DB_ALIAS, connections, ProgrammingError, migration
 from enum import Enum, unique
 
 from .cache import Cache
-from .constants import DEFAULT_CACHE_PATH
+from .constants import DEFAULT_CACHE_PATH, EXPECTED_DATA_MIGRATION_ARGS, DJANGO_APPS_WITH_MIGRATIONS
 from .utils import clean_bytes_to_str, get_migration_abspath, split_migration_path
 from .operations import IgnoreMigration
 from .sql_analyser import analyse_sql_statements
 
 logger = logging.getLogger(__name__)
 
-DJANGO_APPS_WITH_MIGRATIONS = ("admin", "auth", "contenttypes", "sessions")
-EXPECTED_DATA_MIGRATION_ARGS = ("apps", "schema_editor")
-
 
 @unique
 class MessageType(Enum):