diff --git a/python/pymetkit/tests/test_expand.py b/python/pymetkit/tests/test_expand.py
index 40bdb58a3..9ac3b26e5 100644
--- a/python/pymetkit/tests/test_expand.py
+++ b/python/pymetkit/tests/test_expand.py
@@ -112,6 +112,15 @@ def test_date_year_day_of_year():
     assert expand_key("date", "2018-23") == ["20180123"]
 
 
+def test_date_range_alternate_format():
+    # Check that expansion respects alternate date formats
+    assert expand_key("date", "2020-01-01/to/2020-01-03") == [
+        "20200101",
+        "20200102",
+        "20200103",
+    ]
+
+
 def test_date_range_crosses_leap_day():
     # 2020 is a leap year, so 29 Feb is included.
     assert expand_key("date", "20200228/to/20200302") == [
@@ -138,6 +147,15 @@ def test_month_name_climatology_passthrough(value):
     assert expand_key("date", value) == [value]
 
 
+def test_hdate_range():
+    # Check that expansion respects alternate date formats
+    assert expand_key("date", "20200101/to/20200103") == [
+        "20200101",
+        "20200102",
+        "20200103",
+    ]
+
+
 # ---------------------------------------------------------------------------
 # Numeric / expver value normalisation
 # ---------------------------------------------------------------------------