Rebuild and fix pytest based tests in new dir tests_new. To work with defined env for engine using separate process per test.

Makefile

@@ -57,8 +57,9 @@ envtest:
 install-test: compile
 	pip3 install .[test]
 
+# TODO: maybe use setup.py test?
 test: install-test
-	pytest
+	pytest --forked
 
 
 # Development

pyproject.toml

@@ -1,3 +1,11 @@
 [build-system]
 requires = ["setuptools >=39.2.0", "setuptools_scm >= 4.1.2", "wheel >= 0.35.1"]
 build-backend = "setuptools.build_meta"
+
+[tool.pytest.ini_options]
+minversion = "6.0"
+addopts = ""
+testpaths = [
+    "tests_new",
+]
+

setup.cfg

@@ -28,7 +28,7 @@ classifiers =
 zip_safe = false
 include_package_data = true
 python_requires = >= 3.6
-test_suite = tests
+test_suite = tests_new
 install_requires =
 # deprecated/redundant with pyproject.toml, but lets keep both ways around for now
 setup_requires =
@@ -39,4 +39,5 @@ setup_requires =
 # To install these dependencies, run pip install .[test]
 test =
     pytest
+    pytest-forked
 doc = sphinx