diff --git a/autotest/utilities/test_gdal_translate_lib.py b/autotest/utilities/test_gdal_translate_lib.py
index edcc4d9c1957..d8174a9d54be 100755
--- a/autotest/utilities/test_gdal_translate_lib.py
+++ b/autotest/utilities/test_gdal_translate_lib.py
@@ -1188,8 +1188,12 @@ def test_gdal_translate_dmo_option():
         ],
     )
 
+    md = ds.GetMetadata("NEW_DOMAIN")
+    assert "META-TAG" in md, "Did not get META-TAG"
+    assert md["META-TAG"] == "value"
     md = ds.GetMetadata("ANOTHER_NEW_DOMAIN")
     assert "META2-TAG" in md, "Did not get META2-TAG"
+    assert md["META2-TAG"] == "value"
 
     ds = None