============================= test session starts ==============================
platform linux -- Python 3.10.1, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /build/python-pyrsistent/src/pyrsistent-0.18.0
collected 630 items / 1 error / 629 selected

==================================== ERRORS ====================================
_______________ ERROR collecting tests/hypothesis_vector_test.py _______________
ImportError while importing test module '/build/python-pyrsistent/src/pyrsistent-0.18.0/tests/hypothesis_vector_test.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib/python3.10/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
tests/hypothesis_vector_test.py:15: in <module>
    from hypothesis import strategies as st, assume
E   ModuleNotFoundError: No module named 'hypothesis'
=========================== short test summary info ============================
ERROR tests/hypothesis_vector_test.py
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 4.86s ===============================
==> ERROR: A failure occurred in check().
    Aborting...