Fix tests following the upgrade of poetry-core

.github/workflows/main.yml

@@ -77,4 +77,4 @@ jobs:
 
       - name: Run pytest
         shell: bash
-        run: poetry run pytest -v tests
+        run: poetry run python -m pytest -v tests

tests/masonry/builders/test_editable_builder.py

@@ -105,6 +105,7 @@ Classifier: Programming Language :: Python :: 3.5
 Classifier: Programming Language :: Python :: 3.6
 Classifier: Programming Language :: Python :: 3.7
 Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
 Classifier: Topic :: Software Development :: Build Tools
 Classifier: Topic :: Software Development :: Libraries :: Python Modules
 Project-URL: Documentation, https://python-poetry.org/docs

tests/test_factory.py

@@ -107,6 +107,7 @@ def test_create_poetry():
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Software Development :: Build Tools",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ]

tests/utils/test_env.py

@@ -639,7 +639,7 @@ def test_create_venv_tries_to_find_a_compatible_python_executable_using_specific
 
     mocker.patch("sys.version_info", (2, 7, 16))
     mocker.patch(
-        "poetry.utils._compat.subprocess.check_output", side_effect=["3.5.3", "3.8.0"]
+        "poetry.utils._compat.subprocess.check_output", side_effect=["3.5.3", "3.9.0"]
     )
     m = mocker.patch(
         "poetry.utils.env.EnvManager.build_venv", side_effect=lambda *args, **kwargs: ""
@@ -648,7 +648,7 @@ def test_create_venv_tries_to_find_a_compatible_python_executable_using_specific
     manager.create_venv(NullIO())
 
     m.assert_called_with(
-        Path("/foo/virtualenvs/{}-py3.8".format(venv_name)), executable="python3.8"
+        Path("/foo/virtualenvs/{}-py3.9".format(venv_name)), executable="python3.9"
     )