============================= test session starts ==============================
platform linux -- Python 3.10.1, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /build/python-sphinx-theme-builder/src/sphinx-theme-builder-0.2.0a12
collected 7 items / 2 errors / 5 selected

==================================== ERRORS ====================================
__________________ ERROR collecting tests/unit/test_errors.py __________________
ImportError while importing test module '/build/python-sphinx-theme-builder/src/sphinx-theme-builder-0.2.0a12/tests/unit/test_errors.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/unit/test_errors.py:12: in <module>
    from sphinx_theme_builder._internal.errors import DiagnosticError
src/sphinx_theme_builder/__init__.py:16: in <module>
    from ._internal.distributions import generate_metadata as _generate_metadata
src/sphinx_theme_builder/_internal/distributions.py:13: in <module>
    from .nodejs import generate_assets
src/sphinx_theme_builder/_internal/nodejs.py:19: in <module>
    from .project import Project
src/sphinx_theme_builder/_internal/project.py:9: in <module>
    import pep621
E   ModuleNotFoundError: No module named 'pep621'
_________________ ERROR collecting tests/unit/test_project.py __________________
ImportError while importing test module '/build/python-sphinx-theme-builder/src/sphinx-theme-builder-0.2.0a12/tests/unit/test_project.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/unit/test_project.py:9: in <module>
    from sphinx_theme_builder._internal.project import (
src/sphinx_theme_builder/_internal/project.py:9: in <module>
    import pep621
E   ModuleNotFoundError: No module named 'pep621'
=========================== short test summary info ============================
ERROR tests/unit/test_errors.py
ERROR tests/unit/test_project.py
!!!!!!!!!!!!!!!!!!! Interrupted: 2 errors during collection !!!!!!!!!!!!!!!!!!!!
============================== 2 errors in 1.39s ===============================
==> ERROR: A failure occurred in check().
    Aborting...