diff --git a/test/base-test.js b/test/base-test.js
index f3adfaf4..a2b7bffe 100644
--- a/test/base-test.js
+++ b/test/base-test.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("base", () => {
-  it("should get expected errors and warninigs with base config", () => {
-    const result = runLintWithFixtures("base");
+  it("should get expected errors and warninigs with base config", async () => {
+    const result = await runLintWithFixtures("base");
     assert.deepStrictEqual(result, {
       "error.js": {
         errors: [
diff --git a/test/es5-test.js b/test/es5-test.js
index ab8e9895..df74f79e 100644
--- a/test/es5-test.js
+++ b/test/es5-test.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("es5", () => {
-  it("should get expected errors and warninigs with es5 config", () => {
-    const result = runLintWithFixtures("es5");
+  it("should get expected errors and warninigs with es5 config", async () => {
+    const result = await runLintWithFixtures("es5");
     assert.deepStrictEqual(result, {
       "error.js": {
         errors: ["no-unused-vars", "no-redeclare"]
diff --git a/test/flowtype-test.js b/test/flowtype-test.js
index bfd38f3b..c7ac2b21 100644
--- a/test/flowtype-test.js
+++ b/test/flowtype-test.js
@@ -2,9 +2,9 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("flowtype", () => {
-  it("should get expected errors and warninigs with react config with flowtype config", () => {
+  it("should get expected errors and warninigs with react config with flowtype config", async () => {
     // We use react presets in order to support ES2017 syntax
-    const result = runLintWithFixtures("flowtype");
+    const result = await runLintWithFixtures("flowtype");
     assert.deepStrictEqual(result, {
       "ok.js": {},
       "error.js": {
diff --git a/test/globals-kintone-test.js b/test/globals-kintone-test.js
index 7c82afa7..b65a1452 100644
--- a/test/globals-kintone-test.js
+++ b/test/globals-kintone-test.js
@@ -2,8 +2,11 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("kintone", () => {
-  it("should get expected errors and warninigs with kintone config", () => {
-    const result = runLintWithFixtures("globals-kintone", "globals/kintone.js");
+  it("should get expected errors and warninigs with kintone config", async () => {
+    const result = await runLintWithFixtures(
+      "globals-kintone",
+      "globals/kintone.js"
+    );
     assert.deepStrictEqual(result, {
       "error.js": {
         errors: ["no-undef"]
diff --git a/test/kintone-test.js b/test/kintone-test.js
index eaf3d588..c9afb0b7 100644
--- a/test/kintone-test.js
+++ b/test/kintone-test.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("kintone", () => {
-  it("should get expected errors and warninigs with kintone config", () => {
-    const result = runLintWithFixtures("kintone");
+  it("should get expected errors and warninigs with kintone config", async () => {
+    const result = await runLintWithFixtures("kintone");
     assert.deepStrictEqual(result, {
       "error.js": {
         errors: ["strict", "strict"]
diff --git a/test/lib/runLintWithFixtures.js b/test/lib/runLintWithFixtures.js
index 594d809e..34567bce 100644
--- a/test/lib/runLintWithFixtures.js
+++ b/test/lib/runLintWithFixtures.js
@@ -1,6 +1,6 @@
 "use strict";
 
-const CLIEngine = require("eslint").CLIEngine;
+const { ESLint } = require("eslint");
 const path = require("path");
 
 /**
@@ -8,17 +8,17 @@ const path = require("path");
  * @param type lint type, which is in lib directory
  * @returns {Object} lint results {[fileName]: {errors: [ruleNames], warnings: [ruleNames]}}
  */
-const runLintWithFixtures = (type, configFile = `lib/${type}.js`) => {
-  const cli = new CLIEngine({
-    configFile: path.resolve(process.cwd(), configFile),
+const runLintWithFixtures = async (type, configFile = `lib/${type}.js`) => {
+  const eslint = new ESLint({
+    overrideConfigFile: path.resolve(process.cwd(), configFile),
     ignore: false,
     useEslintrc: false,
     extensions: [".js", ".jsx", ".ts", ".tsx"]
   });
   const targetDir = path.resolve(__dirname, "..", "fixtures", type);
-  const lintResult = cli.executeOnFiles([targetDir]);
+  const lintResult = await eslint.lintFiles([targetDir]);
   // console.log(JSON.stringify(lintResult, null, 2));
-  return lintResult.results.reduce((results, { filePath, messages }) => {
+  return lintResult.reduce((results, { filePath, messages }) => {
     // strip path
     const fileName = filePath.replace(`${targetDir}/`, "");
     return Object.assign(results, {
diff --git a/test/node-test.js b/test/node-test.js
index af36cce3..4b4e945b 100644
--- a/test/node-test.js
+++ b/test/node-test.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("node", () => {
-  it("should get expected errors and warninigs with node config", () => {
-    const result = runLintWithFixtures("node");
+  it("should get expected errors and warninigs with node config", async () => {
+    const result = await runLintWithFixtures("node");
     assert.deepStrictEqual(result, {
       "error.js": {
         errors: [
diff --git a/test/node-typescript.js b/test/node-typescript.js
index fe1cdb8e..46df2ecd 100644
--- a/test/node-typescript.js
+++ b/test/node-typescript.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("node-typescript", () => {
-  it("should get expected errors and warninigs", () => {
-    const result = runLintWithFixtures(
+  it("should get expected errors and warninigs", async () => {
+    const result = await runLintWithFixtures(
       "node-typescript",
       "presets/node-typescript-prettier.js"
     );
diff --git a/test/presets-test.js b/test/presets-test.js
index 0254db1c..7fe5f4ac 100644
--- a/test/presets-test.js
+++ b/test/presets-test.js
@@ -3,66 +3,72 @@ const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("presets", () => {
   describe("index", () => {
-    it("should be able to use index as well as lib/base", () => {
+    it("should be able to use index as well as lib/base", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("base"),
-        runLintWithFixtures("base", "index.js")
+        await runLintWithFixtures("base"),
+        await runLintWithFixtures("base", "index.js")
       );
     });
   });
   describe("react", () => {
-    it("should be able to use react as well as lib/base and lib/react", () => {
-      assert.deepStrictEqual(runLintWithFixtures("react", "presets/react.js"), {
-        "ok.jsx": {}
-      });
+    it("should be able to use react as well as lib/base and lib/react", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("base"),
-        runLintWithFixtures("base", "presets/react.js")
+        await runLintWithFixtures("react", "presets/react.js"),
+        {
+          "ok.jsx": {}
+        }
+      );
+      assert.deepStrictEqual(
+        await runLintWithFixtures("base"),
+        await runLintWithFixtures("base", "presets/react.js")
       );
     });
   });
   describe("flowtype", () => {
-    it("should be able to use flowtype as well as lib/base and lib/flowtype", () => {
+    it("should be able to use flowtype as well as lib/base and lib/flowtype", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("flowtype"),
-        runLintWithFixtures("flowtype", "presets/flowtype.js")
+        await runLintWithFixtures("flowtype"),
+        await runLintWithFixtures("flowtype", "presets/flowtype.js")
       );
       assert.deepStrictEqual(
-        runLintWithFixtures("base"),
-        runLintWithFixtures("base", "presets/flowtype.js")
+        await runLintWithFixtures("base"),
+        await runLintWithFixtures("base", "presets/flowtype.js")
       );
     });
   });
   describe("react-flowtype", () => {
-    it("should be able to use react-flowtype as well as lib/react and lib/flowtype", () => {
+    it("should be able to use react-flowtype as well as lib/react and lib/flowtype", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("react", "presets/react.js"),
-        runLintWithFixtures("react", "presets/react-flowtype.js")
+        await runLintWithFixtures("react", "presets/react.js"),
+        await runLintWithFixtures("react", "presets/react-flowtype.js")
       );
       assert.deepStrictEqual(
-        runLintWithFixtures("flowtype"),
-        runLintWithFixtures("flowtype", "presets/react-flowtype.js")
+        await runLintWithFixtures("flowtype"),
+        await runLintWithFixtures("flowtype", "presets/react-flowtype.js")
       );
     });
   });
   describe("node", () => {
-    it("should be able to use node as well as lib/node", () => {
+    it("should be able to use node as well as lib/node", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("node"),
-        runLintWithFixtures("node", "presets/node.js")
+        await runLintWithFixtures("node"),
+        await runLintWithFixtures("node", "presets/node.js")
       );
     });
   });
   describe("kintone-customize-es5", () => {
-    it("should be able to use kintone-customize-es5 as well as lib/es5 and lib/kintone", () => {
+    it("should be able to use kintone-customize-es5 as well as lib/es5 and lib/kintone", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("es5"),
-        runLintWithFixtures("es5", "presets/kintone-customize-es5.js")
+        await runLintWithFixtures("es5"),
+        await runLintWithFixtures("es5", "presets/kintone-customize-es5.js")
       );
     });
-    it("should be able to use kintone-customize-es5 as well as lib/kintone", () => {
+    it("should be able to use kintone-customize-es5 as well as lib/kintone", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("kintone", "presets/kintone-customize-es5.js"),
+        await runLintWithFixtures(
+          "kintone",
+          "presets/kintone-customize-es5.js"
+        ),
         {
           "ok.js": {},
           "error.js": { errors: ["strict", "strict"] }
@@ -71,74 +77,83 @@ describe("presets", () => {
     });
   });
   describe("prettier", () => {
-    it("should be able to use prettier as well as lib/prettier", () => {
+    it("should be able to use prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures("prettier", "presets/prettier.js")
       );
     });
   });
   describe("react-prettier", () => {
-    it("should be able to use react-prettier as well as lib/prettier", () => {
+    it("should be able to use react-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/react-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures("prettier", "presets/react-prettier.js")
       );
     });
   });
   describe("react-flowtype-prettier", () => {
-    it("should be able to use react-flowtype-prettier as well as lib/prettier", () => {
+    it("should be able to use react-flowtype-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/react-flowtype-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures(
+          "prettier",
+          "presets/react-flowtype-prettier.js"
+        )
       );
     });
   });
   describe("node-prettier", () => {
-    it("should be able to use node-prettier as well as lib/prettier", () => {
+    it("should be able to use node-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/node-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures("prettier", "presets/node-prettier.js")
       );
     });
   });
   describe("node-typescript-prettier", () => {
-    it("should be able to use node-typescript-prettier as well as lib/prettier", () => {
+    it("should be able to use node-typescript-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/node-typescript-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures(
+          "prettier",
+          "presets/node-typescript-prettier.js"
+        )
       );
     });
   });
   describe("react-typescript-prettier", () => {
-    it("should be able to use react-typescript-prettier as well as lib/prettier", () => {
+    it("should be able to use react-typescript-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/react-typescript-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures(
+          "prettier",
+          "presets/react-typescript-prettier.js"
+        )
       );
     });
   });
   describe("react-typescript", () => {
-    it("should be able to use react-typescript as well as presets/typescript", () => {
+    it("should be able to use react-typescript as well as presets/typescript", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("typescript", "presets/typescript.js"),
-        runLintWithFixtures("typescript", "presets/react-typescript.js")
+        await runLintWithFixtures("typescript", "presets/typescript.js"),
+        await runLintWithFixtures("typescript", "presets/react-typescript.js")
       );
     });
   });
   describe("typescript-prettier", () => {
-    it("should be able to use typescript-prettier as well as lib/prettier", () => {
+    it("should be able to use typescript-prettier as well as lib/prettier", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("prettier"),
-        runLintWithFixtures("prettier", "presets/typescript-prettier.js")
+        await runLintWithFixtures("prettier"),
+        await runLintWithFixtures("prettier", "presets/typescript-prettier.js")
       );
     });
   });
   describe("typescript", () => {
-    it("should be able to use typescript as well as lib/typescript", () => {
+    it("should be able to use typescript as well as lib/typescript", async () => {
       assert.deepStrictEqual(
-        runLintWithFixtures("typescript"),
-        runLintWithFixtures("typescript", "presets/typescript.js")
+        await runLintWithFixtures("typescript"),
+        await runLintWithFixtures("typescript", "presets/typescript.js")
       );
     });
   });
diff --git a/test/prettier-test.js b/test/prettier-test.js
index 3758ffc5..f0d2a0e6 100644
--- a/test/prettier-test.js
+++ b/test/prettier-test.js
@@ -2,8 +2,8 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("prettier", () => {
-  it("should get expected errors and warninigs", () => {
-    const result = runLintWithFixtures("prettier", "presets/prettier.js");
+  it("should get expected errors and warninigs", async () => {
+    const result = await runLintWithFixtures("prettier", "presets/prettier.js");
     assert.deepStrictEqual(result, {
       "ok.js": {},
       "error.js": {
diff --git a/test/react-test.js b/test/react-test.js
index 548d6d53..16d7c514 100644
--- a/test/react-test.js
+++ b/test/react-test.js
@@ -2,9 +2,9 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("react", () => {
-  it("should get expected errors and warninigs", () => {
+  it("should get expected errors and warninigs", async () => {
     // We use react presets in order to support ES2017 syntax
-    const result = runLintWithFixtures("react", "presets/react.js");
+    const result = await runLintWithFixtures("react", "presets/react.js");
     assert.deepStrictEqual(result, {
       "ok.jsx": {}
     });
diff --git a/test/react-typescript-test.js b/test/react-typescript-test.js
index b04b5ce6..b8f0230a 100644
--- a/test/react-typescript-test.js
+++ b/test/react-typescript-test.js
@@ -2,9 +2,9 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("react-typescript", () => {
-  it("should get expected errors and warninigs", () => {
+  it("should get expected errors and warninigs", async () => {
     // We use react presets in order to support ES2017 syntax
-    const result = runLintWithFixtures(
+    const result = await runLintWithFixtures(
       "react-typescript",
       "presets/react-typescript.js"
     );
diff --git a/test/typescript-test.js b/test/typescript-test.js
index 63246037..8a962e30 100644
--- a/test/typescript-test.js
+++ b/test/typescript-test.js
@@ -2,9 +2,9 @@ const assert = require("assert");
 const runLintWithFixtures = require("./lib/runLintWithFixtures");
 
 describe("typescript", () => {
-  it("should get expected errors and warninigs", () => {
+  it("should get expected errors and warninigs", async () => {
     // We use react presets in order to support ES2017 syntax
-    const result = runLintWithFixtures("typescript");
+    const result = await runLintWithFixtures("typescript");
     assert.deepStrictEqual(result, {
       "ok.ts": {},
       "error.ts": {