Update test_computer_placement.py

tests/0.D/test_computer_placement.py

@@ -108,7 +108,8 @@ def test_generate_ship_coordinates(size, orientation):
 
 @pytest.mark.parametrize('ship, ships, expected', apply_names('is_conflict', [True, True, False], conflicts[::10]))
 def test_is_conflict(ship, ships, expected):
-    assert expected == is_conflict(ship, ships)
+    assert expected == is_conflict(ship, ships), f"there should " + (
+        "not " if not expected else "") + f"be a conflict between {ship} and {ships}"
 
 
 @pytest.mark.parametrize('seed', apply_names('place_ships', ["seed = "], [[x] for x in range(1000, 3000)]))