diff --git a/types/js-yaml/js-yaml-tests.ts b/types/js-yaml/js-yaml-tests.ts
index 44cf825205..7421410d5f 100644
--- a/types/js-yaml/js-yaml-tests.ts
+++ b/types/js-yaml/js-yaml-tests.ts
@@ -104,7 +104,7 @@ type.resolve;
 type.construct;
 // $ExpectType object | null
 type.instanceOf;
-// $ExpectType (data:object) => boolean | null
+// $ExpectType ((data: object) => boolean) | null
 type.predicate;
 // $ExpectType ((data: object) => any) | { [x: string]: (data: object) => any; } | null
 type.represent;