test: fix linting error

Author: jooola

tests/unit/storage_box_types/test_domain.py

@@ -12,4 +12,4 @@
     ],
 )
 def test_eq(value):
-    assert value == value
+    assert value.__eq__(value)

tests/unit/storage_boxes/test_domain.py

@@ -12,4 +12,4 @@
     ],
 )
 def test_eq(value):
-    assert value == value
+    assert value.__eq__(value)