diff --git a/types/circuit-breaker-js/circuit-breaker-js-tests.ts b/types/circuit-breaker-js/circuit-breaker-js-tests.ts
index 1436e13e90..b9a3c70a63 100644
--- a/types/circuit-breaker-js/circuit-breaker-js-tests.ts
+++ b/types/circuit-breaker-js/circuit-breaker-js-tests.ts
@@ -10,3 +10,11 @@ status = CircuitBreaker.OPEN;
 
 breaker.forceOpen();
 breaker.forceClose();
+
+breaker.run((success, failure) => {
+    if (Math.random() > 0.5) {
+        success();
+    } else {
+        failure();
+    }
+});
diff --git a/types/circuit-breaker-js/index.d.ts b/types/circuit-breaker-js/index.d.ts
index 6fc58bd40d..7b6854e61f 100644
--- a/types/circuit-breaker-js/index.d.ts
+++ b/types/circuit-breaker-js/index.d.ts
@@ -30,7 +30,13 @@ declare class CircuitBreaker {
     static CLOSED: 2;
 
     constructor(options?: CircuitBreaker.Options);
-    run(command: () => void, fallback?: () => void): void;
+    run(
+        command: (
+            success: () => void,
+            failure: () => void,
+        ) => void,
+        fallback?: () => void
+    ): void;
     forceClose(): void;
     forceOpen(): void;
     unforce(): void;