diff --git a/tests/serializers/models/data.py b/tests/serializers/models/data.py
index 14bd644fe1..b62f85a868 100644
--- a/tests/serializers/models/data.py
+++ b/tests/serializers/models/data.py
@@ -188,11 +188,13 @@ class BooleanPKData(models.Model):
 class CharPKData(models.Model):
     data = models.CharField(max_length=30, primary_key=True)
 
-# class DatePKData(models.Model):
-#    data = models.DateField(primary_key=True)
 
-# class DateTimePKData(models.Model):
-#    data = models.DateTimeField(primary_key=True)
+class DatePKData(models.Model):
+    data = models.DateField(primary_key=True)
+
+
+class DateTimePKData(models.Model):
+    data = models.DateTimeField(primary_key=True)
 
 
 class DecimalPKData(models.Model):
diff --git a/tests/serializers/test_data.py b/tests/serializers/test_data.py
index c56223a1e8..b61dfe075f 100644
--- a/tests/serializers/test_data.py
+++ b/tests/serializers/test_data.py
@@ -16,16 +16,17 @@ from django.test import TestCase
 
 from .models import (
     Anchor, AutoNowDateTimeData, BigIntegerData, BinaryData, BooleanData,
-    BooleanPKData, CharData, CharPKData, DateData, DateTimeData, DecimalData,
-    DecimalPKData, EmailData, EmailPKData, ExplicitInheritBaseModel, FileData,
-    FilePathData, FilePathPKData, FKData, FKDataToField, FKDataToO2O,
-    FKSelfData, FKToUUID, FloatData, FloatPKData, GenericData,
-    GenericIPAddressData, GenericIPAddressPKData, InheritAbstractModel,
-    InheritBaseModel, IntegerData, IntegerPKData, Intermediate, LengthModel,
-    M2MData, M2MIntermediateData, M2MSelfData, ModifyingSaveData,
-    NullBooleanData, O2OData, PositiveIntegerData, PositiveIntegerPKData,
-    PositiveSmallIntegerData, PositiveSmallIntegerPKData, SlugData, SlugPKData,
-    SmallData, SmallPKData, Tag, TextData, TimeData, UniqueAnchor, UUIDData,
+    BooleanPKData, CharData, CharPKData, DateData, DatePKData, DateTimeData,
+    DateTimePKData, DecimalData, DecimalPKData, EmailData, EmailPKData,
+    ExplicitInheritBaseModel, FileData, FilePathData, FilePathPKData, FKData,
+    FKDataToField, FKDataToO2O, FKSelfData, FKToUUID, FloatData, FloatPKData,
+    GenericData, GenericIPAddressData, GenericIPAddressPKData,
+    InheritAbstractModel, InheritBaseModel, IntegerData, IntegerPKData,
+    Intermediate, LengthModel, M2MData, M2MIntermediateData, M2MSelfData,
+    ModifyingSaveData, NullBooleanData, O2OData, PositiveIntegerData,
+    PositiveIntegerPKData, PositiveSmallIntegerData,
+    PositiveSmallIntegerPKData, SlugData, SlugPKData, SmallData, SmallPKData,
+    Tag, TextData, TimeData, UniqueAnchor, UUIDData,
 )
 from .tests import register_tests
 
@@ -317,8 +318,8 @@ The end."""),
     (pk_obj, 601, BooleanPKData, True),
     (pk_obj, 602, BooleanPKData, False),
     (pk_obj, 610, CharPKData, "Test Char PKData"),
-    # (pk_obj, 620, DatePKData, datetime.date(2006, 6, 16)),
-    # (pk_obj, 630, DateTimePKData, datetime.datetime(2006, 6, 16, 10, 42, 37)),
+    (pk_obj, 620, DatePKData, datetime.date(2006, 6, 16)),
+    (pk_obj, 630, DateTimePKData, datetime.datetime(2006, 6, 16, 10, 42, 37)),
     (pk_obj, 640, EmailPKData, "hovercraft@example.com"),
     # (pk_obj, 650, FilePKData, 'file:///foo/bar/whiz.txt'),
     (pk_obj, 660, FilePathPKData, "/foo/bar/whiz.txt"),