diff --git a/package.json b/package.json
index 924e36f1..f86edeed 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
     "@eslint/compat": "^1.1.1",
     "@eslint/eslintrc": "^3.1.0",
     "@eslint/js": "^9.11.1",
+    "@opentf/std": "^0.13.0",
     "@total-typescript/ts-reset": "^0.6.1",
     "@types/eslint__js": "^8.42.3",
     "@types/node": "^22.7.4",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 53b6c84e..bbe51bce 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -27,6 +27,9 @@ importers:
       '@eslint/js':
         specifier: ^9.11.1
         version: 9.11.1
+      '@opentf/std':
+        specifier: ^0.13.0
+        version: 0.13.0
       '@total-typescript/ts-reset':
         specifier: ^0.6.1
         version: 0.6.1
@@ -551,6 +554,10 @@ packages:
   '@octokit/types@13.6.0':
     resolution: {integrity: sha512-CrooV/vKCXqwLa+osmHLIMUb87brpgUqlqkPGc6iE2wCkUvTrHiXFMhAKoDDaAAYJrtKtrFTgSQTg5nObBEaew==}
 
+  '@opentf/std@0.13.0':
+    resolution: {integrity: sha512-VG9vn7oML5prxWipDvod1X7z9+3fyyCbw+SuD5F7cWx9F1bXFZdAYGIKGqqHLtfxz3mrXZWHcxnm8d0YwQ7tKQ==}
+    engines: {node: '>=16.20.2'}
+
   '@pkgjs/parseargs@0.11.0':
     resolution: {integrity: sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==}
     engines: {node: '>=14'}
@@ -2754,6 +2761,8 @@ snapshots:
     dependencies:
       '@octokit/openapi-types': 22.2.0
 
+  '@opentf/std@0.13.0': {}
+
   '@pkgjs/parseargs@0.11.0':
     optional: true
 
diff --git a/src/return-dispatch.ts b/src/return-dispatch.ts
index f36a3ce5..417e6dff 100644
--- a/src/return-dispatch.ts
+++ b/src/return-dispatch.ts
@@ -3,7 +3,7 @@ import * as core from "@actions/core";
 import { ActionOutputs, type ActionConfig } from "./action.ts";
 import * as api from "./api.ts";
 import * as constants from "./constants.ts";
-import { getBranchName, type BranchNameResult } from "./utils.ts";
+import { type BranchNameResult } from "./utils.ts";
 
 export function shouldRetryOrThrow(
   error: Error,
diff --git a/src/test-utils/logging.mock.ts b/src/test-utils/logging.mock.ts
index 92167a24..fa6f6d5c 100644
--- a/src/test-utils/logging.mock.ts
+++ b/src/test-utils/logging.mock.ts
@@ -1,4 +1,5 @@
 import * as core from "@actions/core";
+import { symDiff } from "@opentf/std";
 import { type MockInstance, vi, expect } from "vitest";
 
 // Consuming test suites must first call:
@@ -63,7 +64,10 @@ function assertOnlyCalledInner(
     );
   }
 
-  const diff = coreLogMockSet.symmetricDifference(new Set(coreLogMocks));
+  // Once Node 22 is LTS, this can be:
+  // const diff = coreLogMockSet.symmetricDifference(new Set(coreLogMocks));
+
+  const diff = symDiff([[...coreLogMockSet], coreLogMocks]);
 
   for (const logMock of diff) {
     expect(logMock).not.toHaveBeenCalled();
diff --git a/tsconfig.json b/tsconfig.json
index f912871f..7af44a12 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "esnext",
+    "target": "es2023",
     "module": "nodenext",
     "noEmit": true,