diff --git a/pyproject.toml b/pyproject.toml
index 9c4e833..ccc1cc9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -116,7 +116,9 @@ python_functions = ["test_*"]
 addopts = "-v --tb=short --strict-markers"
 markers = [
     "slow: marks tests as slow (deselect with '-m \"not slow\"')",
-    "integration: marks tests as integration tests"
+    "integration: marks tests as integration tests",
+    "benchmark: marks tests as performance benchmarks",
+    "validation: marks tests as validation tests for PM mode claims"
 ]
 
 [tool.coverage.run]