Run pytest from CI pipeline through tox.

.gitlab-ci.yml

 stages:
+  - test
   - build
   - deploy
 
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
+test:
+  stage: test
+  image:
+    name: python:3.8-buster
+  before_script:
+    - apt-get -y update && apt-get -y install postgresql libpq5 libpq-dev libssl-dev
+    - pip install poetry
+  script:
+    - poetry install
+    - poetry run tox
+
 build_docker:
   stage: build
   image:

pyproject.toml

@@ -67,6 +67,7 @@ django-stubs = "^1.1"
 pytest = "^5.3"
 pytest-django = "^3.7"
 pytest-django-testing-postgresql = "^0.1"
+tox = "^3.14"
 
 [build-system]
 requires = ["poetry>=0.12"]

tox.ini

 [tox]
 skipsdist = True
-envlist = py37
 
 [testenv]
 whitelist_externals = poetry
+    pytest
 skip_install = true
+commands = pytest
 
 [pylama]
 linters = pycodestyle,pydocstyle,pyflakes,radon