diff --git a/lib/api.js b/lib/api.js
index 3dde0985505..fd43d9ef332 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -9,9 +9,9 @@
 // Requirements
 //-----------------------------------------------------------------------------
 
-const { ESLint } = require("./eslint");
+const { FlatESLint } = require("./eslint/flat-eslint");
 const { Linter } = require("./linter");
-const { RuleTester } = require("./rule-tester");
+const { FlatRuleTester } = require("./rule-tester");
 const { SourceCode } = require("./source-code");
 
 //-----------------------------------------------------------------------------
@@ -20,7 +20,7 @@ const { SourceCode } = require("./source-code");
 
 module.exports = {
     Linter,
-    ESLint,
-    RuleTester,
+    ESLint: FlatESLint,
+    RuleTester: FlatRuleTester,
     SourceCode
 };
diff --git a/lib/rule-tester/index.js b/lib/rule-tester/index.js
index f52d14027c5..27d4c402fc8 100644
--- a/lib/rule-tester/index.js
+++ b/lib/rule-tester/index.js
@@ -1,5 +1,6 @@
 "use strict";
 
 module.exports = {
-    RuleTester: require("./rule-tester")
+    RuleTester: require("./rule-tester"),
+    FlatRuleTester: require("./flat-rule-tester")
 };
diff --git a/tests/lib/api.js b/tests/lib/api.js
index 074d206e52e..abcbea5aef1 100644
--- a/tests/lib/api.js
+++ b/tests/lib/api.js
@@ -18,6 +18,10 @@ const assert = require("chai").assert,
 
 describe("api", () => {
 
+    it("should have ESLint exposed", () => {
+        assert.isFunction(api.ESLint);
+    });
+
     it("should have RuleTester exposed", () => {
         assert.isFunction(api.RuleTester);
     });