diff --git a/x-pack/plugins/ml/server/routes/apidoc_scripts/schema_extractor.test.ts b/x-pack/plugins/ml/server/routes/apidoc_scripts/schema_extractor.test.ts
index b7a706a9bbd0c..bd56c3b5812ab 100644
--- a/x-pack/plugins/ml/server/routes/apidoc_scripts/schema_extractor.test.ts
+++ b/x-pack/plugins/ml/server/routes/apidoc_scripts/schema_extractor.test.ts
@@ -133,7 +133,7 @@ describe('schema_extractor', () => {
           {
             name: 'expand_wildcards',
             documentation: '',
-            type: 'string[]',
+            type: '"all" | "open" | "closed" | "hidden" | "none"',
           },
           {
             name: 'ignore_unavailable',