diff --git a/tests.py b/tests.py
index 844b6b4..0bb0a73 100644
--- a/tests.py
+++ b/tests.py
@@ -103,18 +103,22 @@ def in_memory_db() -> Generator[Engine]:
     Yields:
         The engine used to create the database.
     """
-    from sqlmodel import SQLModel, create_engine
 
     engine = create_engine("sqlite:///:memory:")
 
-    SQLModel.metadata.create_all(engine)
     yield engine
 
     engine.dispose()
 
 
+@pytest.fixture(name="app_db")
+def database_ready_to_use(engine: Engine) -> Generator[Engine]:
+    SQLModel.metadata.create_all(engine)
+    yield engine
+
+
 @pytest.fixture(name="db_teilchen")
-def teilchen_in_db(engine: Engine) -> Generator[Teilchen]:
+def teilchen_in_db(app_db: Engine) -> Generator[Teilchen]:
     """Creates a new Teilchen and stores it in the database.
 
     Args:
@@ -128,20 +132,20 @@ def teilchen_in_db(engine: Engine) -> Generator[Teilchen]:
     teilchen = Teilchen(
         id=uuid.uuid7(), name="TT", description="Test Teilchen", number=1, tags="", text=""
     )
-    with Session(engine) as session:
+    with Session(app_db) as session:
         session.add(teilchen)
         session.commit()
         session.refresh(teilchen)
 
     yield teilchen
 
-    with Session(engine) as session:
+    with Session(app_db) as session:
         session.delete(teilchen)
         session.commit()
 
 
-async def test_loadinitialdata_returns_expected_data(engine: Engine, db_teilchen: Teilchen):
-    all_data: Sequence[tuple] = await load_initial_data(engine)
+async def test_loadinitialdata_returns_expected_data(app_db: Engine, db_teilchen: Teilchen):
+    all_data: Sequence[tuple] = await load_initial_data(app_db)
     assert len(all_data) == 1
 
     fetched_data: tuple = all_data[0]
@@ -159,14 +163,14 @@ async def test_loadinitialdata_returns_expected_data(engine: Engine, db_teilchen
     assert fetched_teilchen == db_teilchen
 
 
-async def test_data_provided_to_addtodatabase_ends_up_in_database(engine: Engine):
-    all_data = await load_initial_data(engine)
+async def test_data_provided_to_addtodatabase_ends_up_in_database(app_db: Engine):
+    all_data = await load_initial_data(app_db)
     assert len(all_data) == 0
 
     teilchen = Teilchen(
         id=uuid.uuid7(), name="test", description="test", tags="#test", number=1, text="test"
     )
 
-    db_teilchen = await add_to_database(teilchen, engine)
+    db_teilchen = await add_to_database(teilchen, app_db)
 
     assert teilchen == db_teilchen