Set up some tests to be skipped in CI builds

.github/workflows/python-package.yml

@@ -39,4 +39,4 @@ jobs:
 #        run: poetry run black . --check
 
       - name: Test with pytest
-        run: poetry run pytest tests
+        run: poetry run pytest "not skip_ci" tests

pyproject.toml

@@ -15,13 +15,17 @@ psutil = "^5.9.4"
 [tool.poetry.scripts]
 rnsh = 'rnsh.rnsh:rnsh_cli'
 
-
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.2.1"
 setuptools = "^67.2.0"
 black = "^23.1.0"
 pytest-asyncio = "^0.20.3"
 
+[tool.pytest.ini_options]
+markers = [
+    "skip_ci: marks tests that should not be run in CI builds (deselect with '-m \"not skip_ci\"')"
+]
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"

tests/test_process.py

@@ -52,6 +52,7 @@ class State(contextlib.AbstractContextManager):
         return False
 
 
+@pytest.mark.skip_ci
 @pytest.mark.asyncio
 async def test_echo():
     """