diff --git a/rest-api-spec/test/mlt/20_docs.yaml b/rest-api-spec/test/mlt/20_docs.yaml
index e6ea84f3114..85d22a4dc23 100644
--- a/rest-api-spec/test/mlt/20_docs.yaml
+++ b/rest-api-spec/test/mlt/20_docs.yaml
@@ -1,5 +1,11 @@
 ---
 "Basic mlt query with docs":
+  - do:
+      indices.create:
+        index: test_1
+        body:
+          settings:
+            number_of_replicas: 0
   - do:
       index:
           index:  test_1