diff --git a/modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/20_scriptfield.yml b/modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/20_scriptfield.yml
index 7c3a9d975efeb..d480a1e722d55 100644
--- a/modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/20_scriptfield.yml
+++ b/modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/20_scriptfield.yml
@@ -5,6 +5,8 @@ setup:
         indices.create:
           index: test
           body:
+            settings:
+              number_of_shards: "1"
             mappings:
               properties:
                 foo: