Add and fix tests

test/conftest.py

@@ -78,3 +78,11 @@ def test_db():
         test_session = None
         db.rollback()
         db.close()
+
+
+@pytest.fixture(scope="session", autouse=True)
+def test_env():
+    """Set up environment variables for testing"""
+    os.environ["APS_TESTRUN"] = "true"
+    yield
+    os.environ.pop("APS_TESTRUN", None)