Tests fail

[ddundo]

Newest test suite has failing tests (https://github.com/mesh-adaptation/movement/actions/runs/12221232036/job/34412642275)

=========================== short test summary info ============================
FAILED test/test_forced_movement.py::TestSpringMover::test_fixed_square - ValueError: ('on_boundary',) contains invalid boundary tags.
FAILED test/test_forced_movement.py::TestSpringMover::test_fixed_triangle - ValueError: ('on_boundary',) contains invalid boundary tags.
FAILED test/test_spring.py::TestExceptions::test_invalid_bc_tag_valueerror - AssertionError: '(4,) contains invalid boundary tags.' != '[4] contains invalid boundary tags.'
- (4,) contains invalid boundary tags.
? ^ ^^
+ [4] contains invalid boundary tags.
? ^ ^
FAILED test/test_spring.py::TestExceptions::test_tangling_valueerror - AssertionError: "('on_boundary',) contains invalid boundary tags." != 'Mesh has 1 tangled element.'
- ('on_boundary',) contains invalid boundary tags.
+ Mesh has 1 tangled element.
FAILED test/test_spring.py::TestStiffness::test_boundary_conditions_1x1_square_all_boundary - ValueError: ('on_boundary',) contains invalid boundary tags.
FAILED test/test_spring.py::TestStiffness::test_boundary_conditions_triangle_all_boundary - ValueError: ('on_boundary',) contains invalid boundary tags.
=========== 6 failed, 122 passed, 675 warnings in 769.77s (0:12:49) ============