Add a non-verbose env

Author: fermezz

.travis.yml

@@ -26,13 +26,20 @@ jobs:
       env: TOXENV=py38-xdist
       python: '3.8'
 
+    # Run also non-verbosely, to gain coverage
+    - env: TOXENV=py38-xdist PYTEST_ADDOPTS=""
+      python: '3.8'
+
     - env: TOXENV=py27-xdist
       python: '2.7'
 
     - stage: tests
       env: TOXENV=py37-numpy-pexpect-twisted
       python: '3.7.4'
 
+    - env: TOXENV=py37-pexpect,py37-twisted
+      python: '3.7.4'
+
     - env: TOXENV=py36-xdist PYTEST_REORDER_TESTS=0
       python: '3.6.9'
 
@@ -57,7 +64,7 @@ before_script:
       export _PYTEST_TOX_COVERAGE_RUN="coverage run -m"
       export _PYTEST_TOX_EXTRA_DEP=coverage-enable-subprocess
     fi
-script: env COLUMNS=120 python -m tox -vv
+script: env COLUMNS=120 python -m tox
 
 after_success:
   - |