diff --git a/tests/test_slice_date_range_fdb.py b/tests/test_slice_date_range_fdb.py
index fbbdff7f2..624a77fe2 100644
--- a/tests/test_slice_date_range_fdb.py
+++ b/tests/test_slice_date_range_fdb.py
@@ -27,6 +27,7 @@ def setup_method(self, method):
     def test_fdb_datacube(self):
         request = Request(
             Select("step", [0]),
+            Select("number", [1]),
             Select("levtype", ["sfc"]),
             Span("date", pd.Timestamp("20230625T120000"), pd.Timestamp("20230626T120000")),
             Select("domain", ["g"]),