fix two tests

Author: timgraham

.github/workflows/test-python.yml

@@ -33,7 +33,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: 'mongodb-forks/django'
-          ref: 'mongodb-5.1.x'
+          ref: 'mongodb-5.1.x-convert_truncated_datetime'
           path: 'django_repo'
           persist-credentials: false
       - name: Install system packages for Django's Python test dependencies

django_mongodb_backend/features.py

@@ -60,10 +60,8 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         "db_functions.math.test_round.RoundTests.test_integer_with_negative_precision",
         # Truncating in another timezone doesn't work becauase MongoDB converts
         # the result back to UTC.
-        "datetimes.tests.DateTimesTests.test_21432",
         "db_functions.datetime.test_extract_trunc.DateFunctionWithTimeZoneTests.test_trunc_func_with_timezone",
         "db_functions.datetime.test_extract_trunc.DateFunctionWithTimeZoneTests.test_trunc_timezone_applied_before_truncation",
-        "timezones.tests.NewDatabaseTests.test_query_datetimes",
         # Unexpected alias_refcount in alias_map.
         "queries.tests.Queries1Tests.test_order_by_tables",
         # The $sum aggregation returns 0 instead of None for null.

django_mongodb_backend/operations.py

@@ -159,6 +159,9 @@ def convert_uuidfield_value(self, value, expression, connection):
             value = uuid.UUID(value)
         return value
 
+    def convert_truncated_datetime(self, value, tzinfo):
+        return value
+
     def combine_expression(self, connector, sub_expressions):
         lhs, rhs = sub_expressions
         if connector == Combinable.BITLEFTSHIFT: