diff --git a/tests/test_model_serializer.py b/tests/test_model_serializer.py
index eac51ae704..386b496d22 100644
--- a/tests/test_model_serializer.py
+++ b/tests/test_model_serializer.py
@@ -160,40 +160,38 @@ class Meta:
 
 class TestRegularFieldMappings(TestCase):
     def test_regular_fields(self):
-        """
-        Model fields should map to their equivalent serializer fields.
-        """
         class TestSerializer(serializers.ModelSerializer):
             class Meta:
                 model = RegularFieldsModel
-                fields = '__all__'
+                fields = "__all__"
 
         expected = dedent(r"""
-            TestSerializer\(\):
-                auto_field = IntegerField\(read_only=True\)
-                big_integer_field = IntegerField\(.*\)
-                boolean_field = BooleanField\(required=False\)
-                char_field = CharField\(max_length=100\)
-                comma_separated_integer_field = CharField\(max_length=100, validators=\[<django.core.validators.RegexValidator object>\]\)
-                date_field = DateField\(\)
-                datetime_field = DateTimeField\(\)
-                decimal_field = DecimalField\(decimal_places=1, max_digits=3\)
-                email_field = EmailField\(max_length=100\)
-                float_field = FloatField\(\)
-                integer_field = IntegerField\(.*\)
-                null_boolean_field = BooleanField\(allow_null=True, required=False\)
-                positive_integer_field = IntegerField\(.*\)
-                positive_small_integer_field = IntegerField\(.*\)
-                slug_field = SlugField\(allow_unicode=False, max_length=100\)
-                small_integer_field = IntegerField\(.*\)
-                text_field = CharField\(max_length=100, style={'base_template': 'textarea.html'}\)
-                file_field = FileField\(max_length=100\)
-                time_field = TimeField\(\)
-                url_field = URLField\(max_length=100\)
-                custom_field = ModelField\(model_field=<tests.test_model_serializer.CustomField: custom_field>\)
-                file_path_field = FilePathField\(path=%r\)
-        """ % tempfile.gettempdir())
-        assert re.search(expected, repr(TestSerializer())) is not None
+        TestSerializer\(\):
+            auto_field = IntegerField\(read_only=True\)
+            big_integer_field = IntegerField\(.*\)
+            boolean_field = BooleanField\(.*\)
+            char_field = CharField\(.*\)
+            comma_separated_integer_field = CharField\(.*\)
+            date_field = DateField\(.*\)
+            datetime_field = DateTimeField\(.*\)
+            decimal_field = DecimalField\(.*\)
+            email_field = EmailField\(.*\)
+            float_field = FloatField\(.*\)
+            integer_field = IntegerField\(.*\)
+            null_boolean_field = BooleanField\(.*\)
+            positive_integer_field = IntegerField\(.*\)
+            positive_small_integer_field = IntegerField\(.*\)
+            slug_field = SlugField\(.*\)
+            small_integer_field = IntegerField\(.*\)
+            text_field = CharField\(.*\)
+            file_field = FileField\(.*\)
+            time_field = TimeField\(.*\)
+            url_field = URLField\(.*\)
+            custom_field = ModelField\(model_field=<tests\.test_model_serializer\.CustomField: custom_field>\)
+            file_path_field = FilePathField\(path='.*'\)
+        """)
+
+        assert re.search
 
     def test_field_options(self):
         class TestSerializer(serializers.ModelSerializer):