diff --git a/spec/fixtures/api/schemas/job/trigger.json b/spec/fixtures/api/schemas/job/trigger.json
index a9d4ccd5dff..807178c662c 100644
--- a/spec/fixtures/api/schemas/job/trigger.json
+++ b/spec/fixtures/api/schemas/job/trigger.json
@@ -16,7 +16,7 @@
         ],
         "properties": {
           "key": { "type": "string" },
-          "value": { "type": "string" },
+          "value": { "type": "string", "optional": true },
           "public": { "type": "boolean" }
         },
         "additionalProperties": false