diff --git a/types/helmet/helmet-tests.ts b/types/helmet/helmet-tests.ts
index 38fa53828f..53fba8e948 100644
--- a/types/helmet/helmet-tests.ts
+++ b/types/helmet/helmet-tests.ts
@@ -206,3 +206,12 @@ function xssFilterTest() {
     app.use(helmet.xssFilter({ setOnOldIE: false }));
     app.use(helmet.xssFilter({ setOnOldIE: true }));
 }
+
+/**
+ * @summary Test for {@see helmet#permittedCrossDomainPolicies} function.
+ */
+function permittedCrossDomainPoliciesTest() {
+    app.use(helmet.permittedCrossDomainPolicies());
+    app.use(helmet.permittedCrossDomainPolicies({}));
+    app.use(helmet.permittedCrossDomainPolicies({ permittedPolicies: 'none' }));
+}