Fix mypy checks

.github/workflows/build.yaml

@@ -8,6 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         include:
           - python-version: 3.7

tests/serializers.py

@@ -202,9 +202,10 @@ class Meta:
 class UFMChildSerializerForValidatorMessage(UniqueFieldsMixin,
                                             serializers.ModelSerializer):
     field = serializers.CharField(validators=[
-        UniqueValidator(queryset=models.UFMChild.objects.all(),
-                        message=UNIQUE_ERROR_MESSAGE
-                        )
+        UniqueValidator(
+            queryset=models.UFMChild.objects.all(),  # type: ignore[attr-defined]
+            message=UNIQUE_ERROR_MESSAGE,
+        )
     ])
 
     class Meta:

tox.ini

@@ -4,10 +4,10 @@ DJANGO_SETTINGS_MODULE = tests.settings
 
 [tox]
 envlist =
-    py{37,38}-dj{22}-drf{38,39,310,311}-{pytest,mypy}
-    py{37,38}-dj{30}-drf{310,311}-{pytest,mypy}
-    py{37,38,39,310,311}-dj{31,32}-drf{311,312,313,314}-{pytest,mypy}
-    py{38,39,310,311}-dj{40,41}-drf{313,314}-{pytest,mypy}
+    py{37,38}-dj{22}-drf{38,39,310,311}-pytest
+    py{37,38}-dj{30}-drf{310,311}-pytest
+    py{37,38,39,310,311}-dj{31,32}-drf{311,312,313,314}-pytest
+    py{38,39,310,311}-dj{40,41}-drf{313,314}-pytest
     py{38,39,310,311}-dj{42}-drf{314}-{pytest,mypy}
 skip_missing_interpreters = true
 
@@ -47,9 +47,8 @@ deps =
     drf313: djangorestframework>=3.13,<3.14
     drf314: djangorestframework>=3.14,<3.15
     pytest: -rrequirements.txt
-    mypy: git+https://github.com/typeddjango/djangorestframework-stubs.git@946c7d60aaecdc9ef307f5e1f8eb55f7083ffb16#egg=djangorestframework-stubs
-    mypy: djangorestframework-stubs
+    mypy: djangorestframework-stubs[compatible-mypy]
 commands=
     pytest: pytest --cov drf_writable_nested --cov-report=xml
-    mypy: mypy example
-    mypy: mypy .
+    mypy: mypy --show-traceback example
+    mypy: mypy --show-traceback .