Merge branch 'css' of github.com:Textualize/textual into text-input

pyproject.toml

@@ -47,6 +47,9 @@ includes = "src"
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]
+markers = [
+    "integration_test: marks tests as slow integration tests(deselect with '-m \"not integration_test\"')",
+]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]