diff --git a/rest-api-spec/test/indices.optimize/10_basic.yaml b/rest-api-spec/test/indices.optimize/10_basic.yaml
new file mode 100644
index 00000000000..e516cb13459
--- /dev/null
+++ b/rest-api-spec/test/indices.optimize/10_basic.yaml
@@ -0,0 +1,12 @@
+---
+"Optimize index tests":
+  - do:
+      indices.create:
+        index: testing
+
+  - do:
+      indices.optimize:
+        index: testing
+        max_num_segments: 1
+
+  - is_true: ok