/usr/lib/python3.7/test/test_json/ is in libpython3.7-testsuite 3.7.0~b3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3.7/test/test_json/__init__.py
/usr/lib/python3.7/test/test_json/__main__.py
/usr/lib/python3.7/test/test_json/test_decode.py
/usr/lib/python3.7/test/test_json/test_default.py
/usr/lib/python3.7/test/test_json/test_dump.py
/usr/lib/python3.7/test/test_json/test_encode_basestring_ascii.py
/usr/lib/python3.7/test/test_json/test_enum.py
/usr/lib/python3.7/test/test_json/test_fail.py
/usr/lib/python3.7/test/test_json/test_float.py
/usr/lib/python3.7/test/test_json/test_indent.py
/usr/lib/python3.7/test/test_json/test_pass1.py
/usr/lib/python3.7/test/test_json/test_pass2.py
/usr/lib/python3.7/test/test_json/test_pass3.py
/usr/lib/python3.7/test/test_json/test_recursion.py
/usr/lib/python3.7/test/test_json/test_scanstring.py
/usr/lib/python3.7/test/test_json/test_separators.py
/usr/lib/python3.7/test/test_json/test_speedups.py
/usr/lib/python3.7/test/test_json/test_tool.py
/usr/lib/python3.7/test/test_json/test_unicode.py