diff --git a/acceptance/telemetry/dummy-error/test.toml b/acceptance/telemetry/dummy-error/test.toml
index fa94a6aba..81c410b64 100644
--- a/acceptance/telemetry/dummy-error/test.toml
+++ b/acceptance/telemetry/dummy-error/test.toml
@@ -5,10 +5,10 @@ Pattern = "POST /telemetry-ext"
 Response.Body = '''
 {
     "error_code": "ERROR_CODE",
-    "message": "Endpoint not found."
+    "message": "Endpoint not implemented."
 }
 '''
-Response.StatusCode = 404
+Response.StatusCode = 501
 
 [[Repls]]
 Old = '17\d{11}'