diff --git a/types/node-red__runtime/index.d.ts b/types/node-red__runtime/index.d.ts
index 0e5eadee2934a9..364db064b1e852 100644
--- a/types/node-red__runtime/index.d.ts
+++ b/types/node-red__runtime/index.d.ts
@@ -237,7 +237,7 @@ declare namespace runtime {
                     strategy: Strategy;
                     options: object;
                 };
-                users: UsernamePermissions[];
+                users: UsernamePermissions[] | ((username: string) => Promise<UsernamePermissions | null>);
             }
             | undefined;
 
diff --git a/types/node-red__runtime/node-red__runtime-tests.ts b/types/node-red__runtime/node-red__runtime-tests.ts
index 5adede8558e64a..ab687b407c7c3e 100644
--- a/types/node-red__runtime/node-red__runtime-tests.ts
+++ b/types/node-red__runtime/node-red__runtime-tests.ts
@@ -1,6 +1,35 @@
 import runtime = require("@node-red/runtime");
+import editorApi from "@node-red/editor-api";
+import { Server } from "https";
 
 async function runtimeTests() {
+    const httpServer = new Server();
+    runtime.init(
+        {
+            adminAuth: {
+                type: "strategy",
+                strategy: {
+                    name: "customStrategy",
+                    label: "Custom Strategy",
+                    icon: "path/to/icon.png",
+                    strategy: {
+                        authenticate: () => {},
+                    },
+                    options: {},
+                },
+                users: async (username) => {
+                    return {
+                        username,
+                        permissions: ["*"],
+                    };
+                },
+            },
+            uiPort: 18880,
+            uiHost: "localhost",
+        },
+        httpServer,
+        editorApi,
+    );
     await runtime.start();
     await runtime.stop();