diff --git a/angular-idle/angular-idle-tests.ts b/angular-idle/angular-idle-tests.ts
index f3401b10f..bcb2f2e55 100644
--- a/angular-idle/angular-idle-tests.ts
+++ b/angular-idle/angular-idle-tests.ts
@@ -38,6 +38,7 @@ angular.module('app', ['ngIdle'])
 		Keepalive.start();
 		Keepalive.ping();
 		Keepalive.stop();
+        Keepalive.setInterval(10);
 
         Title.setEnabled(Title.isEnabled());
         Title.original(Title.original());
diff --git a/angular-idle/angular-idle.d.ts b/angular-idle/angular-idle.d.ts
index b2087e60d..a53c3a930 100644
--- a/angular-idle/angular-idle.d.ts
+++ b/angular-idle/angular-idle.d.ts
@@ -145,6 +145,12 @@ declare module angular.idle {
          * Performs one ping only.
          */
         ping(): void;
+        
+        /**
+         * Changes the interval value at runtime.
+         * You will need to restart the pinging process by calling start() manually for the changes to be reflected.
+         */
+        setInterval(seconds: number): void;
     }
 
     /**