diff --git a/lib/config/flat-config-array.js b/lib/config/flat-config-array.js
index fbedf139d8b..cd439e55244 100644
--- a/lib/config/flat-config-array.js
+++ b/lib/config/flat-config-array.js
@@ -14,6 +14,7 @@ const { flatConfigSchema } = require("./flat-config-schema");
 const { RuleValidator } = require("./rule-validator");
 const { defaultConfig } = require("./default-config");
 const recommendedConfig = require("../../conf/eslint-recommended");
+const allConfig = require("../../conf/eslint-all");
 
 //-----------------------------------------------------------------------------
 // Helpers
@@ -78,13 +79,7 @@ class FlatConfigArray extends ConfigArray {
         }
 
         if (config === "eslint:all") {
-
-            /*
-             * Load `eslint-all.js` here instead of at the top level to avoid loading all rule modules
-             * when it isn't necessary. `eslint-all.js` reads `meta` of rule objects to filter out deprecated ones,
-             * so requiring `eslint-all.js` module loads all rule modules as a consequence.
-             */
-            return require("../../conf/eslint-all");
+            return allConfig;
         }
 
         return config;
diff --git a/package.json b/package.json
index b5dd764327e..b9018f7f03f 100644
--- a/package.json
+++ b/package.json
@@ -122,7 +122,6 @@
     "node-polyfill-webpack-plugin": "^1.0.3",
     "npm-license": "^0.3.3",
     "nyc": "^15.0.1",
-    "pirates": "^4.0.5",
     "progress": "^2.0.3",
     "proxyquire": "^2.0.1",
     "puppeteer": "^9.1.1",
diff --git a/tests/_utils/test-lazy-loading-rules.js b/tests/_utils/test-lazy-loading-rules.js
deleted file mode 100644
index bac4383242a..00000000000
--- a/tests/_utils/test-lazy-loading-rules.js
+++ /dev/null
@@ -1,66 +0,0 @@
-/**
- * @fileoverview Tests lazy-loading of core rules
- * @author Milos Djermanovic
- */
-
-/*
- * This module should be run as a child process, with `fork()`,
- * because it is important to run this test with a separate, clean Node process
- * in order to add hooks before any of the ESLint modules is loaded.
- */
-
-"use strict";
-
-const path = require("path");
-const assert = require("assert");
-const { addHook } = require("pirates");
-
-const {
-    dir: rulesDirectoryPath,
-    name: rulesDirectoryIndexFilename
-} = path.parse(require.resolve("../../lib/rules"));
-
-// Show full stack trace. The default 10 is usually not enough to find the root cause of this problem.
-Error.stackTraceLimit = Infinity;
-
-const [cwd, pattern, usedRulesCommaSeparated] = process.argv.slice(2);
-
-assert.ok(cwd, "cwd argument isn't provided");
-assert.ok(pattern, "pattern argument isn't provided");
-assert.ok(usedRulesCommaSeparated, "used rules argument isn't provided");
-
-const usedRules = usedRulesCommaSeparated.split(",");
-
-// `require()` hook
-addHook(
-    (_code, filename) => {
-        throw new Error(`Unexpected attempt to load unused rule ${filename}`);
-    },
-    {
-
-        // returns `true` if the hook (the function passed in as the first argument) should be called for this filename
-        matcher(filename) {
-            const { dir, name } = path.parse(filename);
-
-            if (dir === rulesDirectoryPath && ![rulesDirectoryIndexFilename, ...usedRules].includes(name)) {
-                return true;
-            }
-
-            return false;
-        }
-
-    }
-);
-
-/*
- * Everything related to loading any ESLint modules should be in this IIFE
- */
-(async () => {
-    const { ESLint } = require("../..");
-    const eslint = new ESLint({ cwd });
-
-    await eslint.lintFiles([pattern]);
-})().catch(({ message, stack }) => {
-    process.send({ message, stack });
-    process.exit(1);
-});
diff --git a/tests/fixtures/lazy-loading-rules/.eslintrc.js b/tests/fixtures/lazy-loading-rules/.eslintrc.js
deleted file mode 100644
index fc6500203b9..00000000000
--- a/tests/fixtures/lazy-loading-rules/.eslintrc.js
+++ /dev/null
@@ -1,6 +0,0 @@
-module.exports = {
-    root: true,
-    rules: {
-        semi: 2
-    }
-};
diff --git a/tests/fixtures/lazy-loading-rules/foo.js b/tests/fixtures/lazy-loading-rules/foo.js
deleted file mode 100644
index 9b2b3016bd0..00000000000
--- a/tests/fixtures/lazy-loading-rules/foo.js
+++ /dev/null
@@ -1 +0,0 @@
-/* content is not necessary */
diff --git a/tests/lib/eslint/eslint.js b/tests/lib/eslint/eslint.js
index cc150b34961..9c84e979d9b 100644
--- a/tests/lib/eslint/eslint.js
+++ b/tests/lib/eslint/eslint.js
@@ -27,7 +27,6 @@ const {
 const hash = require("../../../lib/cli-engine/hash");
 const { unIndent, createCustomTeardown } = require("../../_utils");
 const coreRules = require("../../../lib/rules");
-const childProcess = require("child_process");
 
 //------------------------------------------------------------------------------
 // Tests
@@ -6695,45 +6694,4 @@ describe("ESLint", () => {
             });
         });
     });
-
-    describe("loading rules", () => {
-        it("should not load unused core rules", done => {
-            let calledDone = false;
-
-            const cwd = getFixturePath("lazy-loading-rules");
-            const pattern = "foo.js";
-            const usedRules = ["semi"];
-
-            const forkedProcess = childProcess.fork(
-                path.join(__dirname, "../../_utils/test-lazy-loading-rules.js"),
-                [cwd, pattern, String(usedRules)]
-            );
-
-            // this is an error message
-            forkedProcess.on("message", ({ message, stack }) => {
-                if (calledDone) {
-                    return;
-                }
-                calledDone = true;
-
-                const error = new Error(message);
-
-                error.stack = stack;
-                done(error);
-            });
-
-            forkedProcess.on("exit", exitCode => {
-                if (calledDone) {
-                    return;
-                }
-                calledDone = true;
-
-                if (exitCode === 0) {
-                    done();
-                } else {
-                    done(new Error("Forked process exited with a non-zero exit code"));
-                }
-            });
-        });
-    });
 });