diff --git a/drf_spectacular/contrib/rest_auth.py b/drf_spectacular/contrib/rest_auth.py
index bd8be038..aab21a62 100644
--- a/drf_spectacular/contrib/rest_auth.py
+++ b/drf_spectacular/contrib/rest_auth.py
@@ -1,4 +1,5 @@
 from django.conf import settings
+from django.utils.version import get_version_tuple
 from rest_framework import serializers
 
 from drf_spectacular.contrib.rest_framework_simplejwt import (
@@ -9,13 +10,33 @@
 from drf_spectacular.utils import extend_schema
 
 
+def get_dj_rest_auth_setting(class_name, setting_name):
+    from dj_rest_auth.__version__ import __version__
+
+    if get_version_tuple(__version__) < (3, 0, 0):
+        from dj_rest_auth import app_settings
+
+        return getattr(app_settings, class_name)
+    else:
+        from dj_rest_auth.app_settings import api_settings
+
+        return getattr(api_settings, setting_name)
+
+
 def get_token_serializer_class():
-    from dj_rest_auth.app_settings import JWTSerializer, TokenSerializer
+    from dj_rest_auth.__version__ import __version__
 
-    if getattr(settings, 'REST_USE_JWT', False):
-        return JWTSerializer
+    if get_version_tuple(__version__) < (3, 0, 0):
+        use_jwt = getattr(settings, 'REST_USE_JWT', False)
     else:
-        return TokenSerializer
+        from dj_rest_auth.app_settings import api_settings
+
+        use_jwt = api_settings.USE_JWT
+
+    if use_jwt:
+        return get_dj_rest_auth_setting('JWTSerializer', 'JWT_SERIALIZER')
+    else:
+        return get_dj_rest_auth_setting('TokenSerializer', 'TOKEN_SERIALIZER')
 
 
 class RestAuthDetailSerializer(serializers.Serializer):
@@ -89,10 +110,8 @@ class RestAuthJWTSerializer(OpenApiSerializerExtension):
     target_class = 'dj_rest_auth.serializers.JWTSerializer'
 
     def map_serializer(self, auto_schema, direction):
-        from dj_rest_auth.app_settings import UserDetailsSerializer
-
         class Fixed(self.target_class):
-            user = UserDetailsSerializer()
+            user = get_dj_rest_auth_setting('UserDetailsSerializer', 'USER_DETAILS_SERIALIZER')()
 
         return auto_schema._map_serializer(Fixed, direction)
 
diff --git a/tests/contrib/test_rest_auth.py b/tests/contrib/test_rest_auth.py
index f0bb6898..e7bf7d6a 100644
--- a/tests/contrib/test_rest_auth.py
+++ b/tests/contrib/test_rest_auth.py
@@ -30,8 +30,8 @@ def test_rest_auth(no_warnings):
 
 @pytest.mark.contrib('dj_rest_auth', 'allauth', 'rest_framework_simplejwt')
 @mock.patch('drf_spectacular.settings.spectacular_settings.SCHEMA_PATH_PREFIX', '')
+@mock.patch('dj_rest_auth.app_settings.api_settings.USE_JWT', True)
 def test_rest_auth_token(no_warnings, settings):
-    settings.REST_USE_JWT = True
     # flush module import cache to re-evaluate conditional import
     import dj_rest_auth.urls
     reload(dj_rest_auth.urls)