OpenStack Tempest testr Error Fixed

1)
(.venv)saju@saju-Inspiron-5521:~/tempest_test/tempest$ testr run --parallel tempest.api.image.v2.test_images
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-500} \
${PYTHON:-python} -m subunit.run discover -t ./ ./tempest --list
/home/saju/tempest_test/tempest/.venv/bin/python: No module named subunit
Non-zero exit code (1) from test listing. stdout='', stderr=None


2)
(.venv)saju@saju-Inspiron-5521:~/tempest_test/tempest$ testr run --parallel tempest.api.identity.admin.v3.test_users
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-500} \
${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./tempest/test_discover} --list
Non-zero exit code (2) from test listing. stdout='\xb3 `q\x80\x17text/plain;charset=utf8\rimport 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stderr=None