diff --git a/requirements/py310-django32.txt b/requirements/py310-django32.txt
index 7b5e23f1..25b021ae 100644
--- a/requirements/py310-django32.txt
+++ b/requirements/py310-django32.txt
@@ -164,3 +164,7 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
diff --git a/requirements/py310-django40.txt b/requirements/py310-django40.txt
index b202d540..18b32d92 100644
--- a/requirements/py310-django40.txt
+++ b/requirements/py310-django40.txt
@@ -160,3 +160,7 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
diff --git a/requirements/py310-django41.txt b/requirements/py310-django41.txt
index 0270658e..4fd9e765 100644
--- a/requirements/py310-django41.txt
+++ b/requirements/py310-django41.txt
@@ -160,3 +160,7 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
diff --git a/requirements/py311-django41.txt b/requirements/py311-django41.txt
index 4d84d64b..6e479748 100644
--- a/requirements/py311-django41.txt
+++ b/requirements/py311-django41.txt
@@ -160,3 +160,7 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
diff --git a/requirements/py37-django32.txt b/requirements/py37-django32.txt
index 36ddba86..02b00f1b 100644
--- a/requirements/py37-django32.txt
+++ b/requirements/py37-django32.txt
@@ -176,6 +176,7 @@ typing-extensions==4.3.0 \
     --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
     --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
     # via
+    #   -r requirements.in
     #   asgiref
     #   importlib-metadata
 zipp==3.8.1 \
diff --git a/requirements/py38-django32.txt b/requirements/py38-django32.txt
index a74aeb4b..7c04cc3c 100644
--- a/requirements/py38-django32.txt
+++ b/requirements/py38-django32.txt
@@ -168,6 +168,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/py38-django40.txt b/requirements/py38-django40.txt
index 51e1446c..5f1aafca 100644
--- a/requirements/py38-django40.txt
+++ b/requirements/py38-django40.txt
@@ -182,6 +182,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/py38-django41.txt b/requirements/py38-django41.txt
index 99abb042..44c6a6a9 100644
--- a/requirements/py38-django41.txt
+++ b/requirements/py38-django41.txt
@@ -182,6 +182,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/py39-django32.txt b/requirements/py39-django32.txt
index 29ecf420..33dad005 100644
--- a/requirements/py39-django32.txt
+++ b/requirements/py39-django32.txt
@@ -168,6 +168,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/py39-django40.txt b/requirements/py39-django40.txt
index 1bc0d967..ebfc5ff7 100644
--- a/requirements/py39-django40.txt
+++ b/requirements/py39-django40.txt
@@ -164,6 +164,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/py39-django41.txt b/requirements/py39-django41.txt
index b01e1529..55907500 100644
--- a/requirements/py39-django41.txt
+++ b/requirements/py39-django41.txt
@@ -164,6 +164,10 @@ tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via pytest
+typing-extensions==4.3.0 \
+    --hash=sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02 \
+    --hash=sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6
+    # via -r requirements.in
 zipp==3.8.1 \
     --hash=sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2 \
     --hash=sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009
diff --git a/requirements/requirements.in b/requirements/requirements.in
index 3017cfba..f7dad6f5 100644
--- a/requirements/requirements.in
+++ b/requirements/requirements.in
@@ -9,3 +9,4 @@ pytest
 pytest-django
 pytest-flake8-path
 pytest-randomly
+typing-extensions
diff --git a/tests/testapp/models.py b/tests/testapp/models.py
index 2abac8ad..dc7a7380 100644
--- a/tests/testapp/models.py
+++ b/tests/testapp/models.py
@@ -34,6 +34,7 @@
     SizedBinaryField,
     SizedTextField,
 )
+from tests.testapp.utils import conn_is_mysql
 
 
 class EnumModel(Model):
@@ -122,7 +123,7 @@ class DynamicModel(Model):
     @classmethod
     def check(cls, **kwargs: Any) -> list[checks.CheckMessage]:
         # Disable the checks on MySQL so that checks tests don't fail
-        if not connection.mysql_is_mariadb:
+        if conn_is_mysql(connection) and not connection.mysql_is_mariadb:
             return []
         return super().check(**kwargs)
 
@@ -136,7 +137,7 @@ class SpeclessDynamicModel(Model):
     @classmethod
     def check(cls, **kwargs):
         # Disable the checks on MySQL so that checks tests don't fail
-        if not connection.mysql_is_mariadb:
+        if conn_is_mysql(connection) and not connection.mysql_is_mariadb:
             return []
         return super().check(**kwargs)
 
diff --git a/tests/testapp/test_listcharfield.py b/tests/testapp/test_listcharfield.py
index 150b4e8d..9570320d 100644
--- a/tests/testapp/test_listcharfield.py
+++ b/tests/testapp/test_listcharfield.py
@@ -78,7 +78,7 @@ def test_char_lookup_contains(self):
     def test_char_lookup_icontains(self):
         self.check_char_lookup("icontains")
 
-    def check_char_lookup(self, lookup):
+    def check_char_lookup(self, lookup: str) -> None:
         lname = "field__" + lookup
         mymodel = CharListModel.objects.create(field=["mouldy", "rotten"])
 
diff --git a/tests/testapp/test_operations.py b/tests/testapp/test_operations.py
index 12bfe9ab..8c39a92a 100644
--- a/tests/testapp/test_operations.py
+++ b/tests/testapp/test_operations.py
@@ -11,6 +11,7 @@
 
 from django_mysql.operations import AlterStorageEngine, InstallPlugin, InstallSOName
 from django_mysql.test.utils import override_mysql_variables
+from tests.testapp.utils import conn_is_mysql
 
 
 def plugin_exists(plugin_name: str) -> bool:
@@ -40,9 +41,9 @@ class PluginOperationTests(TransactionTestCase):
     databases = {"default", "other"}
 
     @classmethod
-    def setUpClass(cls):
+    def setUpClass(cls) -> None:
         super().setUpClass()
-        if not connection.mysql_is_mariadb:
+        if not conn_is_mysql(connection) or not connection.mysql_is_mariadb:
             raise SkipTest("The metadata_lock_info plugin is required")
 
     def test_install_plugin_describe(self):
diff --git a/tests/testapp/test_rewrite_query.py b/tests/testapp/test_rewrite_query.py
index 46b74d91..0faf5f6b 100644
--- a/tests/testapp/test_rewrite_query.py
+++ b/tests/testapp/test_rewrite_query.py
@@ -38,7 +38,7 @@ def test_non_select_update_deletes_ignored(self):
             == "SHOW TABLES "
         )
 
-    def check_identity(self, query):
+    def check_identity(self, query: str) -> None:
         assert rewrite_query(query) == query
 
     def test_straight_join(self):
diff --git a/tests/testapp/test_test_utils.py b/tests/testapp/test_test_utils.py
index 4531d124..e98856b8 100644
--- a/tests/testapp/test_test_utils.py
+++ b/tests/testapp/test_test_utils.py
@@ -12,10 +12,10 @@ class OverrideVarsMethodTest(TestCase):
     def test_method_decorator(self):
         self.check_timestamp(123)
 
-    def check_timestamp(self, expected, using="default"):
+    def check_timestamp(self, expected: int, using: str = "default") -> None:
         with connections[using].cursor() as cursor:
             cursor.execute("SELECT @@TIMESTAMP")
-            mode = cursor.fetchone()[0]
+            mode: int = cursor.fetchone()[0]
 
         assert mode == expected
 
diff --git a/tests/testapp/utils.py b/tests/testapp/utils.py
index a621ae35..c6b7b263 100644
--- a/tests/testapp/utils.py
+++ b/tests/testapp/utils.py
@@ -1,22 +1,37 @@
 from __future__ import annotations
 
+import sys
 from contextlib import contextmanager
-from typing import Any
+from types import TracebackType
+from typing import Any, Generator
 
 import pytest
 from django.db import DEFAULT_DB_ALIAS, connection, connections
+from django.db.backends.base.base import BaseDatabaseWrapper
+from django.db.backends.mysql.base import DatabaseWrapper as MySQLDatabaseWrapper
 from django.db.backends.utils import CursorWrapper
 from django.test.utils import CaptureQueriesContext
 
+if sys.version_info >= (3, 10):
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
+
+
+def conn_is_mysql(connection: BaseDatabaseWrapper) -> TypeGuard[MySQLDatabaseWrapper]:
+    return connection.vendor == "mysql"
+
 
 @contextmanager
-def skip_if_mysql_8_plus():
-    if not connection.mysql_is_mariadb and connection.mysql_version >= (8,):
+def skip_if_mysql_8_plus() -> Generator[None, None, None]:
+    if not conn_is_mysql(connection) or (
+        not connection.mysql_is_mariadb and connection.mysql_version >= (8,)
+    ):
         pytest.skip("Requires MySQL<8 or MariaDB")
     yield
 
 
-def column_type(table_name, column_name):
+def column_type(table_name: str, column_name: str) -> str:
     with connection.cursor() as cursor:
         cursor.execute(
             """SELECT DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS
@@ -24,46 +39,57 @@ def column_type(table_name, column_name):
                      COLUMN_NAME = %s""",
             (table_name, column_name),
         )
-        return cursor.fetchone()[0]
+        type_: str = cursor.fetchone()[0]
+        return type_
 
 
 class CaptureLastQuery:
-    def __init__(self, conn=None):
+    def __init__(self, conn: BaseDatabaseWrapper | None = None) -> None:
         if conn is None:  # pragma: no branch
             conn = connection
-        self.conn = conn
+        self.conn: BaseDatabaseWrapper = conn
 
-    def __enter__(self):
+    def __enter__(self) -> CaptureLastQuery:
         self.capturer = CaptureQueriesContext(self.conn)
         self.capturer.__enter__()
         return self
 
-    def __exit__(self, a, b, c):
-        self.capturer.__exit__(a, b, c)
+    def __exit__(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
+    ) -> None:
+        self.capturer.__exit__(exc_type, exc_val, exc_tb)
 
     @property
-    def query(self):
+    def query(self) -> str:
         return self.capturer.captured_queries[-1]["sql"]
 
 
 class print_all_queries:
-    def __init__(self, conn=None):
+    def __init__(self, conn: BaseDatabaseWrapper | None = None) -> None:
         if conn is None:  # pragma: no branch
             conn = connection
-        self.conn = conn
+        self.conn: BaseDatabaseWrapper = conn
 
-    def __enter__(self):
+    def __enter__(self) -> print_all_queries:
         self.capturer = CaptureQueriesContext(self.conn)
         self.capturer.__enter__()
         return self
 
-    def __exit__(self, a, b, c):
-        self.capturer.__exit__(a, b, c)
+    def __exit__(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
+    ) -> None:
+        self.capturer.__exit__(exc_type, exc_val, exc_tb)
         for q in self.capturer.captured_queries:
             print(q["sql"])
 
 
-def used_indexes(query, using=DEFAULT_DB_ALIAS):
+def used_indexes(query: str, using: str = DEFAULT_DB_ALIAS) -> set[str]:
     """
     Given SQL 'query', run EXPLAIN and return the names of the indexes used
     """