diff --git a/selfprivacy_api/utils/huey.py b/selfprivacy_api/utils/huey.py
index 7b39d5a..034f7ba 100644
--- a/selfprivacy_api/utils/huey.py
+++ b/selfprivacy_api/utils/huey.py
@@ -1,8 +1,14 @@
 """MiniHuey singleton."""
+import os
 from huey import SqliteHuey
 
 HUEY_DATABASE = "/etc/nixos/userdata/tasks.db"
 
 # Singleton instance containing the huey database.
 
-huey = SqliteHuey(HUEY_DATABASE)
+test_mode = os.environ.get("TEST_MODE")
+
+huey = SqliteHuey(
+    HUEY_DATABASE,
+    immediate=test_mode == "true",
+)
diff --git a/tests/conftest.py b/tests/conftest.py
index b4f812d..ea7a66a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,10 +1,15 @@
 """Tests configuration."""
 # pylint: disable=redefined-outer-name
 # pylint: disable=unused-argument
+import os
 import pytest
 from fastapi.testclient import TestClient
 
 
+def pytest_generate_tests(metafunc):
+    os.environ["TEST_MODE"] = "true"
+
+
 @pytest.fixture
 def tokens_file(mocker, shared_datadir):
     """Mock tokens file."""
@@ -17,10 +22,7 @@ def tokens_file(mocker, shared_datadir):
 @pytest.fixture
 def jobs_file(mocker, shared_datadir):
     """Mock tokens file."""
-    mock = mocker.patch(
-        "selfprivacy_api.utils.JOBS_FILE",
-        shared_datadir / "jobs.json"
-    )
+    mock = mocker.patch("selfprivacy_api.utils.JOBS_FILE", shared_datadir / "jobs.json")
     return mock
 
 
diff --git a/tests/test_common.py b/tests/test_common.py
index e581bd4..e5d3f62 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -1,6 +1,7 @@
 # pylint: disable=redefined-outer-name
 # pylint: disable=unused-argument
 import json
+import os
 import pytest
 
 from selfprivacy_api.utils import WriteUserData, ReadUserData
@@ -28,3 +29,12 @@ def test_write_invalid_user_data():
     with pytest.raises(ValueError):
         with WriteUserData("invalid") as user_data:
             pass
+
+
+@pytest.fixture
+def test_mode():
+    return os.environ.get("TEST_MODE")
+
+
+def test_the_test_mode(test_mode):
+    assert test_mode == "true"