diff --git a/pyproject.toml b/pyproject.toml
index 3b3615e..0972486 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,6 +110,7 @@ markers = [
     "mods: tests mod metadata/link creation",
     "pefile: validate PE files",
     "post_install: requires a completed installation",
+    "redact: log redaction mechanisms",
     "slow: long-running tests",
     "webtest: checks remote endpoints"
 ]