go back to normal test and try new fixture stack fix

Author: SalmonMode

.travis.yml

@@ -8,7 +8,7 @@ jobs:
     - stage: test
       python: 3.6
       env:
-        - TOXENV=py36-dj30-postgres-xdist-coverage
+        - TOXENV=py36-dj20-postgres-xdist-coverage
         # Test in verbose mode.
         - PYTEST_ADDOPTS=-vv
       services:
@@ -98,7 +98,7 @@ install:
   - pip install tox==3.9.0
 
 script:
-  - tox
+  - tox --force-dep "pytest@git+https://github.com/blueyed/pytest@fixture-stack#egg=pytest"
 
 after_success:
   - |