@@ -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",
 
@@ -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,
 
@@ -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();
 
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "esnext",
+    "target": "es2023",
     "module": "nodenext",
     "noEmit": true,
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"compilerOptions": {`
`3`		`- "target": "esnext",`
	`3`	`+ "target": "es2023",`
`4`	`4`	`"module": "nodenext",`
`5`	`5`	`"noEmit": true,`
`6`	`6`