Missing require_data in spectrum/tests/test_dataset.py
@@ -713,6 +713,7 @@ class TestSpectrumDatasetOnOffStack:
assert_allclose(table_gti_stacked_obs["START"], table_gti["START"])
assert_allclose(table_gti_stacked_obs["STOP"], table_gti["STOP"])
+@requires_data("gammapy-data")
def test_datasets_stack_reduce():
obs_ids = [23523, 23526, 23559, 23592]
dataset_list = []
