diff --git a/src/__tests__/unit/os.test.ts b/src/__tests__/unit/os.test.ts
index 06f0d93b..ec4a89bc 100644
--- a/src/__tests__/unit/os.test.ts
+++ b/src/__tests__/unit/os.test.ts
@@ -24,7 +24,7 @@ jest.mock("electron-log", () => ({
     info: jest.fn(),
     error: jest.fn(),
 }));
-jest.mock("ps-list", () => () => []);
+jest.mock("ps-list", (): (() => any[]) => () => []);
 
 const IS_WINDOWS = process.platform === "win32";
 const IS_LINUX = process.platform === "linux";