diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4feebf7..dbea4c2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -100,11 +100,15 @@ jobs:
 
   test_backend:
     name: Backend Tests
-    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
         python-version: ["3.9", "3.10", "3.11"]
+        os: ["ubuntu-20.04"]
+        include:
+          - python-version: "3.9"
+            os: "windows-2022"
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
diff --git a/tests/backend/api_test.py b/tests/backend/api_test.py
index 64c989a..72e6d89 100644
--- a/tests/backend/api_test.py
+++ b/tests/backend/api_test.py
@@ -14,7 +14,8 @@
 
 @pytest.fixture(name="client")
 def fixture_client(tmp_path: Path) -> Generator[Client, None, None]:
-    app.config["DATABASE"] = f"sqlite:///{tmp_path}/valens.db"
+    test_db = tmp_path / "test.db"
+    app.config["DATABASE"] = f"sqlite:///{test_db}"
     app.config["SECRET_KEY"] = b"TEST_KEY"
     app.config["TESTING"] = True
 
diff --git a/tests/backend/assets_test.py b/tests/backend/assets_test.py
index 7ac556a..4ca3927 100644
--- a/tests/backend/assets_test.py
+++ b/tests/backend/assets_test.py
@@ -10,7 +10,8 @@
 
 @pytest.fixture(name="client")
 def fixture_client(tmp_path: Path) -> Generator[Client, None, None]:
-    app.config["DATABASE"] = f"sqlite:///{tmp_path}/valens.db"
+    test_db = tmp_path / "test.db"
+    app.config["DATABASE"] = f"sqlite:///{test_db}"
     app.config["SECRET_KEY"] = b"TEST_KEY"
     app.config["TESTING"] = True
 
diff --git a/tests/backend/demo_test.py b/tests/backend/demo_test.py
index 9dc798e..3bde012 100644
--- a/tests/backend/demo_test.py
+++ b/tests/backend/demo_test.py
@@ -7,4 +7,4 @@
 
 def test_run(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setattr(app, "run", lambda x, y: None)
-    demo.run(f"sqlite:///{tmp_path}/db")
+    demo.run(rf"sqlite:///{tmp_path}/db")
diff --git a/tests/conftest.py b/tests/conftest.py
index 1b7d5b8..5b7e16a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -19,6 +19,7 @@ def alembic_config() -> dict[str, str]:
 def alembic_engine() -> object:
     with NamedTemporaryFile() as tmp_file:
         app.config["DATABASE"] = f"sqlite:///{tmp_file.name}"
+        print("XXX", app.config["DATABASE"], repr(app.config["DATABASE"]))
         with app.app_context():
             db.init()
             yield db.get_engine()
diff --git a/tests/e2e/web_test.py b/tests/e2e/web_test.py
index 68adbc1..9d564c7 100644
--- a/tests/e2e/web_test.py
+++ b/tests/e2e/web_test.py
@@ -44,7 +44,7 @@ def _fixture_backend() -> Generator[None, None, None]:
         config = create_config_file(data_dir, db_file)
 
         with app.app_context():
-            app.config["DATABASE"] = f"sqlite:///{db_file}"
+            app.config["DATABASE"] = rf"sqlite:///{db_file}"
             app.config["SECRET_KEY"] = b"TEST_KEY"
             tests.utils.init_db_data()
 
diff --git a/valens/config.py b/valens/config.py
index 96581c5..ef4556e 100644
--- a/valens/config.py
+++ b/valens/config.py
@@ -27,7 +27,7 @@ def check_config_file(environ: dict[str, str]) -> None:
 def create_config_file(config_directory: Path, database_file: Path) -> Path:
     config = config_directory / "config.py"
     config.write_text(
-        f"DATABASE = 'sqlite:///{database_file}'\nSECRET_KEY = {os.urandom(24)!r}\n",
+        f"DATABASE = r'sqlite:///{database_file}'\nSECRET_KEY = {os.urandom(24)!r}\n",
         encoding="utf-8",
     )
     return config
diff --git a/valens/database.py b/valens/database.py
index 6d22381..3f1ff79 100644
--- a/valens/database.py
+++ b/valens/database.py
@@ -32,6 +32,8 @@ def upgrade_lock_file() -> Path:
 
 
 def get_engine() -> Engine:
+    print("get_engine()", current_app.config["DATABASE"], repr(current_app.config["DATABASE"]))
+    print(db_file(), db_file().exists())
     config.check_app_config()
     db_dir().mkdir(exist_ok=True)
     return create_engine(current_app.config["DATABASE"])