diff --git a/tardis/tests/fixtures/regression_data.py b/tardis/tests/fixtures/regression_data.py
index 455eb66fe75..f25aa86d96b 100644
--- a/tardis/tests/fixtures/regression_data.py
+++ b/tardis/tests/fixtures/regression_data.py
@@ -171,5 +171,5 @@ def sync_hdf_store(self, tardis_module, update_fname=True):
 def regression_data(request):
     regression_data_instance = RegressionData(request)
     yield regression_data_instance
-    if regression_data_instance.hdf_store_object.is_open:
+    if regression_data_instance.hdf_store_object is not None and regression_data_instance.hdf_store_object.is_open:
         regression_data_instance.hdf_store_object.close()