Run pytest as a separate job to avoid scripts from getting overwr…

…itten (#776)

* Include pytest as a separate test case to avoid scripts from getting overwritten

* Remove python: 3.8 since it's already globally specified

.travis.yml

@@ -22,15 +22,13 @@ env:
 
 cache: pip
 
-# command to run tests
-script:
-  - python -m pip install --editable .
-  - python -m pytest --cov=ark --pycodestyle ark
-
 jobs:
   include:
+    - stage: pytest_run
+      script:
+        - python -m pip install --editable .
+        - python -m pytest --cov=ark --pycodestyle ark
     - stage: test_pypi_deploy
-      python: 3.8
       script:
         - "travis_wait 120 sleep 7200 &"
         - python setup.py bdist_wheel
@@ -40,7 +38,6 @@ jobs:
         - twine upload -r testpypi --skip-existing /home/travis/build/"$TRAVIS_REPO_SLUG"/wheelhouse/*.whl -u "$TEST_PYPI_USERNAME" -p "$TEST_PYPI_PASSWORD"
     - stage: pypi_deploy
       if: tag IS present
-      python: 3.8
       script:
         - "travis_wait 120 sleep 7200 &"
         - python setup.py bdist_wheel
@@ -50,7 +47,6 @@ jobs:
         - twine upload --skip-existing /home/travis/build/"$TRAVIS_REPO_SLUG"/wheelhouse/*.whl -u "$PYPI_USERNAME" -p "$PYPI_PASSWORD"
     - stage: docker_deploy
       if: tag IS present
-      python: 3.8
       script:
         - "travis_wait 120 sleep 7200 &"
         - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin