diff --git a/dkist/conftest.py b/dkist/conftest.py
index 4e466c47..62c0f005 100644
--- a/dkist/conftest.py
+++ b/dkist/conftest.py
@@ -421,8 +421,9 @@ def croppable_visp_dataset(tmp_path_factory):
 
 
 @pytest.fixture(scope="session")
-def croppable_cryo_dataset():
+def croppable_cryo_dataset(tmp_path_factory):
+    cryodir = tmp_path_factory.mktemp("data")
     with gzip.open(Path(rootdir) / "croppable_cryo.asdf.gz", mode="rb") as gfo:
-        with open(rootdir / "croppable_cryo.asdf", mode="wb") as afo:
+        with open(cryodir / "croppable_cryo.asdf", mode="wb") as afo:
             afo.write(gfo.read())
-    return load_dataset(Path(rootdir) / "croppable_cryo.asdf")
+    return load_dataset(cryodir / "croppable_cryo.asdf")