diff --git a/pyproject.toml b/pyproject.toml
index 352af68..f293107 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ Documentation = "https://github.com/rubakas/agent-notes/tree/main/docs"
 
 [project.optional-dependencies]
 dev = ["pytest>=7.0"]
+graph = ["graphifyy>=0.7.0"]
 
 [project.scripts]
 agent-notes = "agent_notes.cli:main"
@@ -56,5 +57,6 @@ markers = [
     "requires_network: test needs internet — deselect from default suite",
     "requires_clean_repo: test needs a clean working tree — deselect from default suite",
     "requires_build: test needs python -m build (wheel build) — deselect from default suite",
+    "requires_graphify: test needs graphifyy installed — deselect from default suite",
 ]
-addopts = "-m 'not requires_network and not requires_clean_repo and not requires_build'"
\ No newline at end of file
+addopts = "-m 'not requires_network and not requires_clean_repo and not requires_build and not requires_graphify'"