diff --git a/test/unit/data/data_access/test_misc.py b/test/unit/data/data_access/test_misc.py
index 1dfc193465f6..40d55552a16d 100644
--- a/test/unit/data/data_access/test_misc.py
+++ b/test/unit/data/data_access/test_misc.py
@@ -149,3 +149,10 @@ def test_populated_optimized_list_list_not_populated(session, make_dataset_colle
     assert not c1.populated_optimized
     assert not c2.populated
     assert not c2.populated_optimized
+
+
+def test_default_disk_usage(session, make_user):
+    u = make_user()
+    u.adjust_total_disk_usage(1, None)
+    user_reload = session.get(m.User, u.id)
+    assert user_reload.disk_usage == 1
diff --git a/test/unit/data/test_galaxy_mapping.py b/test/unit/data/test_galaxy_mapping.py
index 7ad6a4117782..481bd1a62479 100644
--- a/test/unit/data/test_galaxy_mapping.py
+++ b/test/unit/data/test_galaxy_mapping.py
@@ -347,15 +347,6 @@ def test_nested_collection_attributes(self):
         ]
         assert c4.dataset_elements == [dce1, dce2]
 
-    def test_default_disk_usage(self):
-        u = model.User(email="disk_default@test.com", password="password")
-        self.persist(u)
-        u.adjust_total_disk_usage(1, None)
-        u_id = u.id
-        self.expunge()
-        user_reload = self.model.session.get(model.User, u_id)
-        assert user_reload.disk_usage == 1
-
     def test_basic(self):
         original_user_count = len(self.model.session.scalars(select(model.User)).all())