diff --git a/knip.json b/knip.json
index 9f2c7db4a3..f1a6efef71 100644
--- a/knip.json
+++ b/knip.json
@@ -42,6 +42,7 @@
         "headless-agent/tests/fixtures/telemetry-redact-rule.ts",
         "acp-agent/tests/snapshots/lsp-definition/workspace/subject.ts",
         "acp-agent/tests/fixtures/subagent-durability-failure.ts",
+        "acp-agent/tests/fixtures/subagent-settlement-marker.ts",
         "acp-agent/tests/fixtures/subagent/subagent-acp/mock-delegating-llm.ts",
         "acp-agent/tests/fixtures/subagent/subagent-acp/driver.ts",
         "jsonrpc-agent/tests/fixtures/subagent/subagent-dsh-sdk/driver.ts",