diff --git a/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs b/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
index 35c1727ab29..7f909a8ff17 100644
--- a/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
+++ b/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
@@ -156,6 +156,7 @@ function assertExpectedDiagnostics(surfaceMode, errorMessages) {
     "http route registration missing or invalid auth: /kitchen-sink/http-route",
     "plugin must own memory slot or declare contracts.memoryEmbeddingProviders for adapter: kitchen-sink-memory-embedding-provider",
     "plugin must declare contracts.tools for: kitchen-sink-tool",
+    'channel "kitchen-sink-channel-probe" registration missing required config helpers',
     'agent harness "kitchen-sink-agent-harness" registration missing required runtime methods',
     "memory prompt supplement registration missing builder",
   ]);