diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/10_basic.yaml b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/10_basic.yaml
index 62a75b0ff04..b391032bee3 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/10_basic.yaml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/10_basic.yaml
@@ -58,6 +58,7 @@
         index: "source"
         target: "target"
         wait_for_active_shards: 1
+        master_timeout: 10s
         body:
           settings:
             index.number_of_replicas: 0