diff --git a/types/hapi__joi/hapi__joi-tests.ts b/types/hapi__joi/hapi__joi-tests.ts
index 640907f1db..89a459b5b1 100644
--- a/types/hapi__joi/hapi__joi-tests.ts
+++ b/types/hapi__joi/hapi__joi-tests.ts
@@ -961,13 +961,22 @@ schema = Joi.compile(schemaMap);
 
 Joi.assert(obj, schema);
 Joi.assert(obj, schema, str);
+Joi.assert(obj, schema, str, validOpts);
 Joi.assert(obj, schema, err);
+Joi.assert(obj, schema, err, validOpts);
+Joi.assert(obj, schema, validOpts);
 Joi.assert(obj, schemaLike);
 
-Joi.attempt(obj, schema);
-Joi.attempt(obj, schema, str);
-Joi.attempt(obj, schema, err);
-Joi.attempt(obj, schemaLike);
+{
+    let value = { username: 'example', password: 'example' };
+    value = Joi.attempt(obj, schema);
+    value = Joi.attempt(obj, schema, str);
+    value = Joi.attempt(obj, schema, str, validOpts);
+    value = Joi.attempt(obj, schema, err);
+    value = Joi.attempt(obj, schema, err, validOpts);
+    value = Joi.attempt(obj, schema, validOpts);
+    value = Joi.attempt(obj, schemaLike);
+}
 
 ref = Joi.ref(str, refOpts);
 ref = Joi.ref(str);
diff --git a/types/hapi__joi/index.d.ts b/types/hapi__joi/index.d.ts
index 9f3c1e4e45..71b368c548 100644
--- a/types/hapi__joi/index.d.ts
+++ b/types/hapi__joi/index.d.ts
@@ -1961,16 +1961,18 @@ declare namespace Joi {
          * @param schema - the schema object.
          * @param message - optional message string prefix added in front of the error message. may also be an Error object.
          */
-        assert(value: any, schema: SchemaLike, message?: string | Error, options?: ValidationOptions): void;
+        assert(value: any, schema: SchemaLike, options?: ValidationOptions): void;
+        assert(value: any, schema: SchemaLike, message: string | Error, options?: ValidationOptions): void;
 
         /**
-         * Validates a value against a schema and throws if validation fails.
+         * Validates a value against a schema, returns valid object, and throws if validation fails.
          *
          * @param value - the value to validate.
          * @param schema - the schema object.
          * @param message - optional message string prefix added in front of the error message. may also be an Error object.
          */
-        attempt(value: any, schema: SchemaLike, message?: string | Error, options?: ValidationOptions): void;
+        attempt(value: any, schema: SchemaLike, options?: ValidationOptions): any;
+        attempt(value: any, schema: SchemaLike, message: string | Error, options?: ValidationOptions): any;
 
         cache: CacheConfiguration;