diff --git a/lib/cli-engine/config-array-factory.js b/lib/cli-engine/config-array-factory.js
index 39f62bb6da1..7c0fba65c67 100644
--- a/lib/cli-engine/config-array-factory.js
+++ b/lib/cli-engine/config-array-factory.js
@@ -697,38 +697,6 @@ class ConfigArrayFactory {
             ctx.matchBasePath
         );
 
-        /**
-         * Cloning the rule's config as we are setting `useDefaults` to true`
-         * which mutates the config with its default value if present. And when we
-         * refer to a same variable for config for different rules, that referred variable will
-         * be mutated and it will be used for both.
-         *
-         * Example:
-         *
-         * const commonRuleConfig  = ['error', {}];
-         *
-         * Now if we use this variable as a config for rules like this
-         *
-         * {
-         *      rules: {
-         *          "a" : commonRuleConfig,
-         *          "b" : commonRuleConfig,
-         *      }
-         * }
-         *
-         * And if these rules have default values in their schema, their
-         * config will be mutated with default values, the mutated `commonRuleConfig` will be used for `b` as well and it probably
-         * throw schema voilation errors.
-         *
-         * Refer https://github.com/eslint/eslint/issues/12592
-         */
-        const clonedRulesConfig = rules && JSON.parse(
-            JSON.stringify(
-                rules,
-                (key, value) => (value === Infinity ? Number.MAX_SAFE_INTEGER : value)
-            )
-        );
-
         // Flatten `extends`.
         for (const extendName of extendList.filter(Boolean)) {
             yield* this._loadExtends(extendName, ctx);
@@ -763,7 +731,7 @@ class ConfigArrayFactory {
             processor,
             reportUnusedDisableDirectives,
             root,
-            rules: clonedRulesConfig,
+            rules,
             settings
         };
 
diff --git a/tests/fixtures/config-file/cloned-config/circularRefEslintConfig.js b/tests/fixtures/config-file/cloned-config/circularRefEslintConfig.js
deleted file mode 100644
index cc9fcdbcc7c..00000000000
--- a/tests/fixtures/config-file/cloned-config/circularRefEslintConfig.js
+++ /dev/null
@@ -1,15 +0,0 @@
-let errorConfig = ["error", {}];
-
-class CircularRef {
-  constructor() {
-    this.self = this;
-  }
-}
-
-module.exports = {
-  settings: {
-    sharedData: new CircularRef()
-  },
-
-  rules: { camelcase: errorConfig, "default-case": errorConfig }
-};
diff --git a/tests/fixtures/config-file/cloned-config/configWithInfinity.js b/tests/fixtures/config-file/cloned-config/configWithInfinity.js
deleted file mode 100644
index 73e3c93c085..00000000000
--- a/tests/fixtures/config-file/cloned-config/configWithInfinity.js
+++ /dev/null
@@ -1,6 +0,0 @@
-module.exports = {
-
-  rules: {
-      "max-len": [ "error", { code: Infinity }]
-  }
-};
diff --git a/tests/fixtures/config-file/cloned-config/eslintConfig.js b/tests/fixtures/config-file/cloned-config/eslintConfig.js
deleted file mode 100644
index 8602e60b0fd..00000000000
--- a/tests/fixtures/config-file/cloned-config/eslintConfig.js
+++ /dev/null
@@ -1,4 +0,0 @@
-let errorConfig = ["error", {}];
-module.exports = {
-    rules: { camelcase: errorConfig, "default-case": errorConfig }
-};
diff --git a/tests/fixtures/config-file/cloned-config/eslintConfigFail.js b/tests/fixtures/config-file/cloned-config/eslintConfigFail.js
deleted file mode 100644
index b8702c6ffb8..00000000000
--- a/tests/fixtures/config-file/cloned-config/eslintConfigFail.js
+++ /dev/null
@@ -1,13 +0,0 @@
-let errorConfig = ["error", {}];
-module.exports = {
-    rules: {
-        camelcase: errorConfig,
-        "default-case": errorConfig ,
-        "camelcase" : [
-            'error',
-            {
-                "ignoreDestructuring": new Date().getUTCFullYear // returns a function
-            }
-        ]
-    }
-};
diff --git a/tests/fixtures/config-file/cloned-config/index.js b/tests/fixtures/config-file/cloned-config/index.js
deleted file mode 100644
index b792f78cad3..00000000000
--- a/tests/fixtures/config-file/cloned-config/index.js
+++ /dev/null
@@ -1 +0,0 @@
-var someValue  = "bar";
diff --git a/tests/fixtures/config-file/cloned-config/inlineText.js b/tests/fixtures/config-file/cloned-config/inlineText.js
deleted file mode 100644
index e000713abaf..00000000000
--- a/tests/fixtures/config-file/cloned-config/inlineText.js
+++ /dev/null
@@ -1,3 +0,0 @@
-/*eslint default-case: ["error", {}]*/
-/*eslint camelcase: ["error", {}]*/
-var someValue  = "bar";
diff --git a/tests/lib/cli.js b/tests/lib/cli.js
index 2f84900eefb..a1d9a23e491 100644
--- a/tests/lib/cli.js
+++ b/tests/lib/cli.js
@@ -187,7 +187,6 @@ describe("cli", () => {
         });
     });
 
-
     describe("when given a config with environment set to Node.js", () => {
         it("should execute without any errors", async () => {
             const configPath = getFixturePath("configurations", "env-node.json");
@@ -1161,66 +1160,4 @@ describe("cli", () => {
         });
     });
 
-    describe("testing the cloned config", () => {
-        describe("config file and input file", () => {
-            it("should not modify original configuration object", async () => {
-                const configPath = getFixturePath("config-file", "cloned-config", "eslintConfig.js");
-                const filePath = getFixturePath("config-file", "cloned-config", "index.js");
-                const args = `--config ${configPath} ${filePath}`;
-
-                const exit = await cli.execute(args);
-
-                assert.strictEqual(exit, 0);
-            });
-
-            it("should exit with 1 as camelcase has wrong property type", async () => {
-                const configPath = getFixturePath("config-file", "cloned-config", "eslintConfigFail.js");
-                const filePath = getFixturePath("config-file", "cloned-config", "index.js");
-                const args = `--config ${configPath} ${filePath}`;
-
-                try {
-                    await cli.execute(args);
-                } catch (error) {
-                    assert.strictEqual(/Configuration for rule "camelcase" is invalid:/u.test(error), true);
-                }
-
-            });
-
-            it("should not cause an error when a rule configuration has `Infinity`", async () => {
-                const configPath = getFixturePath("config-file", "cloned-config", "configWithInfinity.js");
-                const filePath = getFixturePath("config-file", "cloned-config", "index.js");
-                const args = `--config ${configPath} ${filePath}`;
-
-                const exit = await cli.execute(args);
-
-                assert.strictEqual(exit, 0);
-            });
-        });
-
-        describe("inline config and input file", () => {
-            it("should not modify original configuration object", async () => {
-                const filePath = getFixturePath("config-file", "cloned-config", "inlineText.js");
-                const args = `${filePath}`;
-
-                const exit = await cli.execute(args);
-
-                assert.strictEqual(exit, 0);
-            });
-        });
-
-    });
-
-    describe("handling circular reference while cloning", () => {
-        it("should handle circular ref", async () => {
-            const configPath = getFixturePath("config-file", "cloned-config", "circularRefEslintConfig.js");
-            const filePath = getFixturePath("config-file", "cloned-config", "index.js");
-            const args = `--config ${configPath} ${filePath}`;
-
-            try {
-                await cli.execute(args);
-            } catch (error) {
-                assert.instanceOf(error, Error);
-            }
-        });
-    });
 });