diff --git a/flow/testdata/tasks/api/req_001.txt b/flow/testdata/tasks/api/req_001.txt
index bdf555ff..126a9a30 100644
--- a/flow/testdata/tasks/api/req_001.txt
+++ b/flow/testdata/tasks/api/req_001.txt
@@ -37,6 +37,7 @@ tasks: {
     val: call.resp.body
     mask: { 
       headers: {
+        connection: string
         "x-amzn-trace-id": string
         "x-request-start": string
       }