diff --git a/pyproject.toml b/pyproject.toml
index ec83f7ad..4d770e4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ markers = [
     "integration: marks tests as integration tests (requires live GUI)",
     "clean_install: clean install verification (opt-in via RUN_CLEAN_INSTALL_TEST=1)",
     "docker: docker build and run test (opt-in via RUN_DOCKER_TEST=1)",
+    "live: marks tests as live visualization tests (not in CI by default)",
 ]
 
 [tool.mypy]