TEST: pexpect-xdist + coverage (mac os)

Author: blueyed

.travis.yml

@@ -28,12 +28,12 @@ jobs:
       language: generic
       # Coverage for:
       # - py2 with symlink in test_cmdline_python_package_symlink.
-      env: TOXENV=py27-pexpect PYTEST_COVERAGE=1
+      env: TOXENV=py27-pexpect-xdist PYTEST_COVERAGE=1
       before_install:
         - python -V
         - test $(python -c 'import sys; print("%d%d" % sys.version_info[0:2])') = 27
     - <<: *test-macos
-      env: TOXENV=py37-pexpect
+      env: TOXENV=py37-pexpect-xdist PYTEST_COVERAGE=1
       before_install:
         - which python3
         - python3 -V