diff --git a/api/tests/conftest.py b/api/tests/conftest.py
index 4f1ee8962..64dc394e7 100644
--- a/api/tests/conftest.py
+++ b/api/tests/conftest.py
@@ -69,6 +69,11 @@ def tmpdir():
     shutil.rmtree(d)
 
 
+@pytest.fixture
+def tmpfile():
+    yield tempfile.NamedTemporaryFile()
+
+
 @pytest.fixture
 def logged_in_client(db, factories, client):
     user = factories['users.User']()