diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ec863f9c..7aa121c81 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,7 +58,9 @@ jobs:
           PYTHONDEVMODE: 1
       - name: Test FastAPI/Blacksheep/Sanic Examples
         run: |
-          PYTHONPATH=$DEST_FASTAPI uv run --frozen pytest $PYTEST_ARGS $DEST_FASTAPI/_tests.py
+          PYTHONPATH=$DEST_FASTAPI uv run --frozen tortoise -c config.TORTOISE_ORM migrate
+          PYTHONPATH=$DEST_FASTAPI uv run --frozen pytest $PYTEST_ARGS_SEQ $DEST_FASTAPI/_tests.py
+          rm -f $DEST_FASTAPI/db.sqlite3
           PYTHONPATH=$DEST_BLACKSHEEP uv run --frozen pytest $PYTEST_ARGS $DEST_BLACKSHEEP/_tests.py
           PYTHONPATH=$DEST_SANIC uv run --frozen pytest $PYTEST_ARGS $DEST_SANIC/_tests.py
         env:
@@ -67,6 +69,7 @@ jobs:
           DEST_SANIC: examples/sanic
           PYTHONDEVMODE: 1
           PYTEST_ARGS: "-n auto --cov=tortoise --cov-append --cov-branch --tb=native -q"
+          PYTEST_ARGS_SEQ: "--cov=tortoise --cov-append --cov-branch --tb=native -q"
       - name: Test Comprehensive Migrations Example
         run: |
           cd examples/comprehensive_migrations_project
diff --git a/examples/fastapi/_tests.py b/examples/fastapi/_tests.py
index a26d15afe..fb4980c8e 100644
--- a/examples/fastapi/_tests.py
+++ b/examples/fastapi/_tests.py
@@ -1,7 +1,6 @@
 # mypy: no-disallow-untyped-decorators
 # pylint: disable=E0611,E0401
 import multiprocessing
-import os
 from collections.abc import AsyncGenerator
 from concurrent.futures import ProcessPoolExecutor
 from contextlib import asynccontextmanager
@@ -13,11 +12,10 @@
 from asgi_lifespan import LifespanManager
 from httpx import ASGITransport, AsyncClient
 
-from tortoise.contrib.test import MEMORY_SQLITE
+from tortoise.contrib.test import truncate_all_models
 from tortoise.fields.data import JSON_LOADS
 from tortoise.timezone import UTC, localtime
 
-os.environ["DB_URL"] = MEMORY_SQLITE
 try:
     from config import register_orm
     from main import app
@@ -42,7 +40,6 @@ def anyio_backend() -> str:
 
 @asynccontextmanager
 async def client_manager(app, base_url="http://test", **kw) -> ClientManagerType:
-    app.state.testing = True
     async with LifespanManager(app):
         transport = ASGITransport(app=app)
         async with AsyncClient(transport=transport, base_url=base_url, **kw) as c:
@@ -52,6 +49,7 @@ async def client_manager(app, base_url="http://test", **kw) -> ClientManagerType
 @pytest.fixture(scope="module")
 async def client() -> ClientManagerType:
     async with client_manager(app) as c:
+        await truncate_all_models()
         yield c
 
 
@@ -62,6 +60,7 @@ async def client_east() -> ClientManagerType:
     async with client_manager(app_east) as c:
         ctx = app_east.state._tortoise_context
         with ctx:  # Enter context to make it current via contextvar
+            await truncate_all_models()
             yield c
 
 
diff --git a/examples/fastapi/config.py b/examples/fastapi/config.py
index 824527bbc..989c80c08 100644
--- a/examples/fastapi/config.py
+++ b/examples/fastapi/config.py
@@ -1,12 +1,16 @@
 import os
 from functools import partial
+from pathlib import Path
 
 from tortoise.config import AppConfig, DBUrlConfig, TortoiseConfig
 from tortoise.contrib.fastapi import RegisterTortoise
 
+BASE_DIR = Path(__file__).resolve().parent
+DEFAULT_DB_URL = f"sqlite://{BASE_DIR / 'db.sqlite3'}"
+
 # Single source of truth for Tortoise ORM configuration
 TORTOISE_ORM = TortoiseConfig(
-    connections={"default": DBUrlConfig(url=os.getenv("DB_URL", "sqlite://db.sqlite3"))},
+    connections={"default": DBUrlConfig(url=os.getenv("DB_URL", DEFAULT_DB_URL))},
     apps={
         "models": AppConfig(
             models=["models"],
diff --git a/examples/fastapi/main.py b/examples/fastapi/main.py
index 97a3ca7f3..dd50b486b 100644
--- a/examples/fastapi/main.py
+++ b/examples/fastapi/main.py
@@ -1,50 +1,21 @@
 # pylint: disable=E0611,E0401
-import os
 from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
 
+from config import register_orm
 from fastapi import FastAPI
 from routers import router as users_router
 
-from examples.fastapi.config import register_orm
-from tortoise import Tortoise
-from tortoise.backends.base.config_generator import generate_config
-from tortoise.contrib.fastapi import RegisterTortoise, tortoise_exception_handlers
+from tortoise.contrib.fastapi import tortoise_exception_handlers
 
 
 @asynccontextmanager
-async def lifespan_test(app: FastAPI) -> AsyncGenerator[None, None]:
-    config = generate_config(
-        os.getenv("TORTOISE_TEST_DB", "sqlite://:memory:"),
-        app_modules={"models": ["models"]},
-        testing=True,
-        connection_label="models",
-    )
-    async with RegisterTortoise(
-        app=app,
-        config=config,
-        generate_schemas=True,
-        _create_db=True,
-    ):
+async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
+    async with register_orm(app):
         # db connected
         yield
         # app teardown
     # db connections closed
-    await Tortoise._drop_databases()
-
-
-@asynccontextmanager
-async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
-    if getattr(app.state, "testing", None):
-        async with lifespan_test(app) as _:
-            yield
-    else:
-        # app startup
-        async with register_orm(app):
-            # db connected
-            yield
-            # app teardown
-        # db connections closed
 
 
 app = FastAPI(
diff --git a/examples/fastapi/main_custom_timezone.py b/examples/fastapi/main_custom_timezone.py
index d6e9629d1..403f22298 100644
--- a/examples/fastapi/main_custom_timezone.py
+++ b/examples/fastapi/main_custom_timezone.py
@@ -9,9 +9,6 @@
 
 @asynccontextmanager
 async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
-    # app startup
-    # Disable global fallback since this is the secondary app in tests
-    # (main app already uses global fallback). Context is stored in app.state.
     async with register_orm(
         app,
         use_tz=True,