diff --git a/src/docker.test.ts b/src/docker.test.ts
index ee0df5ce..24dbd783 100644
--- a/src/docker.test.ts
+++ b/src/docker.test.ts
@@ -5,12 +5,16 @@ import { boolean, string, uniqueArray } from "fast-check";
 import type { InputOptions } from "@actions/core";
 import type { FunctionLike } from "jest-mock";
 
+import type { Util } from "../types/aliases.js";
+import type { execBashCommand } from "./util.js";
+
 jest.mock("@actions/cache");
 jest.mock("@actions/core");
 
-jest.unstable_mockModule("./util.js", (): typeof import("./util.js") => ({
-  execBashCommand: jest.fn<typeof import("./util.js").execBashCommand>(),
-}));
+jest.unstable_mockModule(
+  "./util.js",
+  (): Util => ({ execBashCommand: jest.fn<typeof execBashCommand>() })
+);
 
 const cache = jest.mocked(await import("@actions/cache"));
 const core = jest.mocked(await import("@actions/core"));
diff --git a/src/integration.test.ts b/src/integration.test.ts
index a42ab773..3ace7166 100644
--- a/src/integration.test.ts
+++ b/src/integration.test.ts
@@ -4,13 +4,13 @@ import { string } from "fast-check";
 
 import { consoleOutput } from "./arbitraries/util.js";
 
-import type { ExecOptions } from "node:child_process";
+import type { exec, ExecOptions } from "node:child_process";
 import type { InputOptions } from "@actions/core";
 
 import type { ConsoleOutput } from "./util.js";
 
 jest.unstable_mockModule("node:child_process", () => ({
-  exec: jest.fn<typeof import("node:child_process").exec>(),
+  exec: jest.fn<typeof exec>(),
 }));
 jest.mock("@actions/cache");
 jest.mock("@actions/core");
@@ -64,7 +64,7 @@ describe("Integration Test", (): void => {
   });
 
   const mockExec = (listStderr: string, otherOutput: ConsoleOutput): void => {
-    child_process.exec.mockImplementation(<typeof child_process.exec>((
+    child_process.exec.mockImplementation(<typeof exec>((
       command: string,
       _options: any,
       callback: any
diff --git a/src/main.test.ts b/src/main.test.ts
index 1cd2fecd..ec073516 100644
--- a/src/main.test.ts
+++ b/src/main.test.ts
@@ -1,9 +1,12 @@
 import { jest } from "@jest/globals";
 
+import type { loadDockerImages } from "./docker.js";
+import type { Docker } from "../types/aliases.js";
+
 jest.unstable_mockModule(
   "./docker.js",
-  (): Partial<typeof import("./docker.js")> => ({
-    loadDockerImages: jest.fn<typeof import("./docker.js").loadDockerImages>(),
+  (): Partial<Docker> => ({
+    loadDockerImages: jest.fn<typeof loadDockerImages>(),
   })
 );
 
diff --git a/src/post.test.ts b/src/post.test.ts
index 71603e5c..6fd80595 100644
--- a/src/post.test.ts
+++ b/src/post.test.ts
@@ -1,9 +1,12 @@
 import { jest } from "@jest/globals";
 
+import type { saveDockerImages } from "./docker.js";
+import type { Docker } from "../types/aliases.js";
+
 jest.unstable_mockModule(
   "./docker.js",
-  (): Partial<typeof import("./docker.js")> => ({
-    saveDockerImages: jest.fn<typeof import("./docker.js").saveDockerImages>(),
+  (): Partial<Docker> => ({
+    saveDockerImages: jest.fn<typeof saveDockerImages>(),
   })
 );
 
diff --git a/src/util.test.ts b/src/util.test.ts
index 6d89550f..85edcf9a 100644
--- a/src/util.test.ts
+++ b/src/util.test.ts
@@ -4,10 +4,12 @@ import { string } from "fast-check";
 
 import { consoleOutput, platform } from "./arbitraries/util.js";
 
+import type { exec } from "node:child_process";
+
 import type { ConsoleOutput } from "./util.js";
 
 jest.unstable_mockModule("node:child_process", () => ({
-  exec: jest.fn<typeof import("node:child_process").exec>(),
+  exec: jest.fn<typeof exec>(),
 }));
 
 jest.mock("@actions/core");
@@ -24,7 +26,7 @@ describe("Util", (): void => {
       platform: NodeJS.Platform,
       output: ConsoleOutput
     ): Promise<string> => {
-      child_process.exec.mockImplementationOnce(<typeof child_process.exec>((
+      child_process.exec.mockImplementationOnce(<typeof exec>((
         _command: any,
         _options: any,
         callback: any
diff --git a/types/aliases.ts b/types/aliases.ts
new file mode 100644
index 00000000..b11f34f4
--- /dev/null
+++ b/types/aliases.ts
@@ -0,0 +1,5 @@
+import type * as docker from "../src/docker.js";
+import type * as util from "../src/util.js";
+
+export type Docker = typeof docker;
+export type Util = typeof util;