diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8d87b58..d546d34 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: 'timgraham/django'
-          ref: 'snowflake-5.0.x'
+          ref: 'snowflake-5.1.x'
           path: 'django_repo'
       - name: Install system packages for Django's Python test dependencies
         run: |
diff --git a/django_snowflake/__init__.py b/django_snowflake/__init__.py
index 1d580be..9da4b81 100644
--- a/django_snowflake/__init__.py
+++ b/django_snowflake/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '5.0.1'
+__version__ = '5.1a1'
 
 # Check Django compatibility before other imports which may fail if the
 # wrong version of Django is installed.
diff --git a/django_snowflake/features.py b/django_snowflake/features.py
index a3dacaa..bb94326 100644
--- a/django_snowflake/features.py
+++ b/django_snowflake/features.py
@@ -155,6 +155,8 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         # Zero pk validation not added yet.
         'backends.tests.MySQLPKZeroTests.test_zero_as_autoval',
         'bulk_create.tests.BulkCreateTests.test_zero_as_autoval',
+        # Snowflake returns 'The Name::42.00000'.
+        'db_functions.text.test_concat.ConcatTests.test_concat_non_str',
     }
 
     django_test_skips = {
@@ -185,21 +187,16 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             'introspection.tests.IntrospectionTests.test_get_constraints_index_types',
             'migrations.test_operations.OperationTests.test_add_index',
             'migrations.test_operations.OperationTests.test_alter_field_with_index',
-            'migrations.test_operations.OperationTests.test_alter_index_together',
             'migrations.test_operations.OperationTests.test_remove_index',
             'migrations.test_operations.OperationTests.test_rename_index',
-            'migrations.test_operations.OperationTests.test_rename_index_unnamed_index',
             'schema.tests.SchemaTests.test_add_remove_index',
             'schema.tests.SchemaTests.test_alter_field_add_index_to_integerfield',
-            'schema.tests.SchemaTests.test_create_index_together',
             'schema.tests.SchemaTests.test_index_together',
-            'schema.tests.SchemaTests.test_index_together_with_fk',
             'schema.tests.SchemaTests.test_indexes',
             'schema.tests.SchemaTests.test_order_index',
             'schema.tests.SchemaTests.test_remove_constraints_capital_letters',
             'schema.tests.SchemaTests.test_remove_db_index_doesnt_remove_custom_indexes',
             'schema.tests.SchemaTests.test_remove_field_unique_does_not_remove_meta_constraints',
-            'schema.tests.SchemaTests.test_remove_index_together_does_not_remove_meta_indexes',
             'schema.tests.SchemaTests.test_remove_unique_together_does_not_remove_meta_constraints',
             'schema.tests.SchemaTests.test_text_field_with_db_index',
         },
@@ -252,6 +249,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             'expressions.tests.BasicExpressionsTests.test_nested_subquery_outer_ref_2',
             'expressions.tests.BasicExpressionsTests.test_nested_subquery_outer_ref_with_autofield',
             'expressions.tests.BasicExpressionsTests.test_order_by_exists',
+            'expressions.tests.BasicExpressionsTests.test_slicing_of_outerref',
             'expressions.tests.BasicExpressionsTests.test_subquery',
             'expressions.tests.BasicExpressionsTests.test_subquery_filter_by_lazy',
             'expressions.tests.BasicExpressionsTests.test_subquery_in_filter',
diff --git a/setup.cfg b/setup.cfg
index db7fa75..6047429 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,7 +11,7 @@ long_description_content_type = text/markdown
 classifiers =
     Development Status :: 5 - Production/Stable
     Framework :: Django
-    Framework :: Django :: 5.0
+    Framework :: Django :: 5.1
     License :: OSI Approved :: MIT License
     Operating System :: OS Independent
     Programming Language :: Python