diff --git a/.github/workflows/types.yml b/.github/workflows/types.yml
index c3241f9f0..6c5f48730 100644
--- a/.github/workflows/types.yml
+++ b/.github/workflows/types.yml
@@ -64,5 +64,5 @@ jobs:
     - run: |
         cd ember-resources
         yarn build:types
-        cd ../testing/ember-concurrency-v1-tests/
+        cd ../testing/ember-concurrency-v1/
         tsc --build
diff --git a/ember-resources/src/-private/resources/ember-concurrency-task.ts b/ember-resources/src/-private/resources/ember-concurrency-task.ts
index 155f96460..d8c441e9c 100644
--- a/ember-resources/src/-private/resources/ember-concurrency-task.ts
+++ b/ember-resources/src/-private/resources/ember-concurrency-task.ts
@@ -34,7 +34,7 @@ export interface TaskInstance<Return = unknown> extends Promise<Return> {
   readonly isFinished: boolean;
   readonly isRunning: boolean;
   readonly isDropped: boolean;
-  cancel(reason?: string): Promise<void>;
+  cancel(reason?: string): void | Promise<void>;
 }
 
 // @private