pytest test_this1.py --collect-only -q
and it will list:

test_this1.py::TestMathUnitTest::test_floor_0_negative
test_this1.py::TestMathUnitTest::test_floor_1_integer
test_this1.py::TestMathUnitTest::test_floor_2_large_fraction
So now you can run just 2 specific sub-tests:

pytest test_this1.py::TestMathUnitTest::test_floor_0_negative  test_this1.py::TestMathUnitTest::test_floor_1_integer
The module parameterized which is already in the developer dependencies
of transformers works for both: unittests and pytest tests.