diff --git a/.eslintrc.yml b/.eslintrc.yml
deleted file mode 100644
index 73eeec2..0000000
--- a/.eslintrc.yml
+++ /dev/null
@@ -1,15 +0,0 @@
----
-extends:
-  - 'eslint:recommended'
-  - 'plugin:node/recommended'
-  - prettier
-plugins:
-  - node
-  - prettier
-rules:
-  prettier/prettier: error
-  block-scoped-var: error
-  eqeqeq: error
-  no-warning-comments: warn
-  no-var: error
-  prefer-const: error
diff --git a/.prettierrc b/.prettierrc
deleted file mode 100644
index df6eac0..0000000
--- a/.prettierrc
+++ /dev/null
@@ -1,8 +0,0 @@
----
-bracketSpacing: false
-printWidth: 80
-semi: true
-singleQuote: true
-tabWidth: 2
-trailingComma: es5
-useTabs: false
diff --git a/browser-test/browser-test-runner.ts b/browser-test/browser-test-runner.ts
index 0908e23..ce267d4 100644
--- a/browser-test/browser-test-runner.ts
+++ b/browser-test/browser-test-runner.ts
@@ -1,4 +1,4 @@
-// Copyright 2019, Google, LLC.
+// Copyright 2019 Google, LLC
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -56,7 +56,9 @@ async function main() {
   console.log(
     `[http server] Karma has finished! I'm no longer listening on port ${port}!`
   );
-  process.exit(result.failed ? 1 : 0);
+  if (result.failed) {
+    throw new Error('Tests failed.');
+  }
 }
 
 main().catch(err => {
diff --git a/browser-test/test.browser.ts b/browser-test/test.browser.ts
index 827eac3..bdf8686 100644
--- a/browser-test/test.browser.ts
+++ b/browser-test/test.browser.ts
@@ -1,5 +1,18 @@
-import assert from 'assert';
+// Copyright 2019 Google, LLC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
+import assert from 'assert';
+import {describe, it} from 'mocha';
 import {request} from '../src/index';
 const port = 7172; // should match the port defined in `webserver.ts`
 
diff --git a/karma.conf.js b/karma.conf.js
index 954ccfb..eff7d04 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -22,7 +22,7 @@ process.env.CHROME_BIN = fs.existsSync('/usr/bin/chromium-browser')
   ? '/usr/bin/chromium-browser'
   : require('puppeteer').executablePath();
 
-module.exports = function (config) {
+module.exports = function(config) {
   config.set({
     // base path that will be used to resolve all patterns (eg. files, exclude)
     basePath: '',
@@ -42,7 +42,7 @@ module.exports = function (config) {
     preprocessors: {
       './src/*.ts': ['coverage'],
       './src/**/*.ts': ['coverage'],
-      './browser-test/*.ts': ['webpack', 'sourcemap']
+      './browser-test/*.ts': ['webpack', 'sourcemap'],
     },
 
     webpack: webpackConfig,
@@ -52,8 +52,8 @@ module.exports = function (config) {
     // available reporters: https://npmjs.org/browse/keyword/karma-reporter
     reporters: ['progress', 'coverage', 'remap-coverage'],
 
-    coverageReporter: { type: 'in-memory' },
-    remapCoverageReporter: { html: './coverage' },
+    coverageReporter: {type: 'in-memory'},
+    remapCoverageReporter: {html: './coverage'},
 
     // web server port
     port: 9876,
@@ -76,8 +76,8 @@ module.exports = function (config) {
         base: 'ChromeHeadless',
         // We must disable the Chrome sandbox when running Chrome inside Docker (Chrome's sandbox needs
         // more permissions than Docker allows by default)
-        flags: isDocker ? ['--no-sandbox'] : []
-      }
+        flags: isDocker ? ['--no-sandbox'] : [],
+      },
     },
 
     // Continuous Integration mode
@@ -90,7 +90,7 @@ module.exports = function (config) {
 
     // set correct MIME type when serving .ts files (already compiled to JavaScript):
     mime: {
-      'text/javascript': ['ts']
-    }
+      'text/javascript': ['ts'],
+    },
   });
 };
diff --git a/package.json b/package.json
index 028b532..06d7a5c 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,6 @@
     "test": "c8 mocha build/test",
     "presystem-test": "npm run compile",
     "system-test": "mocha build/system-test --timeout 40000",
-    "clean": "gts clean",
     "compile": "tsc -p .",
     "fix": "gts fix",
     "prepare": "npm run compile",
@@ -53,7 +52,7 @@
     "codecov": "^3.2.0",
     "execa": "^4.0.0",
     "express": "^4.16.4",
-    "gts": "^1.0.0",
+    "gts": "2.0.0-alpha.4",
     "is-docker": "^2.0.0",
     "karma": "^4.0.0",
     "karma-chrome-launcher": "^3.0.0",
diff --git a/prettier.config.js b/prettier.config.js
deleted file mode 100644
index a425d3f..0000000
--- a/prettier.config.js
+++ /dev/null
@@ -1,4 +0,0 @@
-module.exports = {
-  singleQuote: true,
-  trailingComma: 'es5',
-};
diff --git a/samples/package.json b/samples/package.json
index 7601c87..206f004 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -1,6 +1,9 @@
 {
   "name": "gaxios-samples",
   "private": true,
+  "files": [
+    "*.js"
+  ],
   "scripts": {
     "test": "mocha"
   },
diff --git a/samples/test/test.samples.js b/samples/test/test.samples.js
index ded929f..dcb97a1 100644
--- a/samples/test/test.samples.js
+++ b/samples/test/test.samples.js
@@ -16,7 +16,7 @@ const {execSync} = require('child_process');
 const {assert} = require('chai');
 const {describe, it} = require('mocha');
 
-const exec = cmd => execSync(cmd, { encoding: 'utf8'});
+const exec = cmd => execSync(cmd, {encoding: 'utf8'});
 
 describe(__filename, () => {
   it('should run the quickstart', () => {
diff --git a/src/.eslintrc.json b/src/.eslintrc.json
new file mode 100644
index 0000000..e5a34ae
--- /dev/null
+++ b/src/.eslintrc.json
@@ -0,0 +1,5 @@
+{
+  "env": {
+    "browser": true
+  }
+}
diff --git a/src/common.ts b/src/common.ts
index 364f911..324974a 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -15,7 +15,7 @@ import {AbortSignal} from 'abort-controller';
 import {Agent} from 'http';
 import {URL} from 'url';
 
-// tslint:disable no-any
+/* eslint-disable @typescript-eslint/no-explicit-any */
 
 export class GaxiosError<T = any> extends Error {
   code?: string;
diff --git a/src/gaxios.ts b/src/gaxios.ts
index 7f9c294..55b038f 100644
--- a/src/gaxios.ts
+++ b/src/gaxios.ts
@@ -15,7 +15,6 @@ import extend from 'extend';
 import {Agent} from 'http';
 import nodeFetch, {Response as NodeFetchResponse} from 'node-fetch';
 import qs from 'querystring';
-import stream from 'stream';
 import isStream from 'is-stream';
 import url from 'url';
 
@@ -28,7 +27,8 @@ import {
 } from './common';
 import {getRetryConfig} from './retry';
 
-// tslint:disable no-any
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable node/no-unsupported-features/node-builtins */
 
 const URL = hasURL() ? window.URL : url.URL;
 const fetch = hasFetch() ? window.fetch : nodeFetch;
@@ -45,7 +45,6 @@ function hasFetch() {
   return hasWindow() && !!window.fetch;
 }
 
-// tslint:disable-next-line variable-name
 let HttpsProxyAgent: any;
 
 // Figure out if we should be using a proxy. Only if it's required, load
@@ -132,12 +131,15 @@ export class Gaxios {
     switch (opts.responseType) {
       case 'stream':
         return res.body;
-      case 'json':
+      case 'json': {
         let data = await res.text();
         try {
           data = JSON.parse(data);
-        } catch (e) {}
+        } catch {
+          // continue
+        }
         return data as {};
+      }
       case 'arraybuffer':
         return res.arrayBuffer();
       case 'blob':
diff --git a/src/web.ts b/src/web.ts
deleted file mode 100644
index e69de29..0000000
diff --git a/synth.metadata b/synth.metadata
index 5f04c53..46dd94f 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -1,5 +1,5 @@
 {
-  "updateTime": "2020-04-01T11:18:03.305033Z",
+  "updateTime": "2020-04-01T11:18:04.471175Z",
   "sources": [
     {
       "git": {
diff --git a/system-test/fixtures/sample/src/index.ts b/system-test/fixtures/sample/src/index.ts
index ffc92c4..e96f788 100644
--- a/system-test/fixtures/sample/src/index.ts
+++ b/system-test/fixtures/sample/src/index.ts
@@ -1,7 +1,21 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import {request} from 'gaxios';
 async function main() {
   await request({
-    url: 'https://www.googleapis.com/discovery/v1/apis/'
+    url: 'https://www.googleapis.com/discovery/v1/apis/',
   });
 }
 main();
diff --git a/system-test/fixtures/sample/webpack.config.js b/system-test/fixtures/sample/webpack.config.js
index 4806fd2..b3ced2c 100644
--- a/system-test/fixtures/sample/webpack.config.js
+++ b/system-test/fixtures/sample/webpack.config.js
@@ -21,31 +21,31 @@ module.exports = {
   resolve: {
     extensions: ['.ts', '.js', '.json'],
     alias: {
-      '../../package.json': path.resolve(__dirname, 'package.json')
-    }
+      '../../package.json': path.resolve(__dirname, 'package.json'),
+    },
   },
   output: {
     filename: 'bundle.min.js',
-    path: path.resolve(__dirname, 'dist')
+    path: path.resolve(__dirname, 'dist'),
   },
   node: {
     child_process: 'empty',
     fs: 'empty',
-    crypto: 'empty'
+    crypto: 'empty',
   },
   module: {
     rules: [
       {
         test: /node_modules\/https-proxy-agent\//,
-        use: 'null-loader'
+        use: 'null-loader',
       },
       {
         test: /\.ts$/,
         use: 'ts-loader',
-        exclude: /node_modules/
-      }
-    ]
+        exclude: /node_modules/,
+      },
+    ],
   },
   mode: 'production',
-  plugins: []
+  plugins: [],
 };
diff --git a/system-test/test.install.ts b/system-test/test.install.ts
index e3ee1b0..6c54733 100644
--- a/system-test/test.install.ts
+++ b/system-test/test.install.ts
@@ -20,12 +20,14 @@ import {ncp} from 'ncp';
 import path from 'path';
 import tmp from 'tmp';
 import {promisify} from 'util';
+import {describe, it, before, after} from 'mocha';
 
 const keep = false;
 const mvp = (promisify(mv) as {}) as (...args: string[]) => Promise<void>;
 const ncpp = promisify(ncp);
 const stagingDir = tmp.dirSync({keep, unsafeCleanup: true});
 const stagingPath = stagingDir.name;
+// eslint-disable-next-line @typescript-eslint/no-var-requires
 const pkg = require('../../package.json');
 
 describe('📦 pack and install', () => {
diff --git a/test/test.getch.ts b/test/test.getch.ts
index aec070f..8ce0b33 100644
--- a/test/test.getch.ts
+++ b/test/test.getch.ts
@@ -15,8 +15,9 @@ import assert from 'assert';
 import nock from 'nock';
 import sinon from 'sinon';
 import stream from 'stream';
-const assertRejects = require('assert-rejects');
-// tslint:disable-next-line variable-name
+import {describe, it, afterEach} from 'mocha';
+import assertRejects = require('assert-rejects');
+// eslint-disable-next-line @typescript-eslint/no-var-requires
 const HttpsProxyAgent = require('https-proxy-agent');
 import {
   Gaxios,
@@ -144,9 +145,7 @@ describe('🥁 configuration options', () => {
         responseURL: url,
       },
     };
-    const adapter = (options: GaxiosOptions) => {
-      return Promise.resolve(response);
-    };
+    const adapter = () => Promise.resolve(response);
     const res = await request({url, adapter});
     assert.strictEqual(response, res);
   });
@@ -270,6 +269,7 @@ describe('🥁 configuration options', () => {
 describe('🎏 data handling', () => {
   it('should accpet a ReadableStream as request data', async () => {
     const body = fs.createReadStream('package.json');
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
     const contents = require('../../package.json');
     const scope = nock(url)
       .post('/', contents)
diff --git a/test/test.index.ts b/test/test.index.ts
index 36d2760..ac22903 100644
--- a/test/test.index.ts
+++ b/test/test.index.ts
@@ -12,7 +12,7 @@
 // limitations under the License.
 
 import assert from 'assert';
-
+import {describe, it} from 'mocha';
 import * as main from '../src/index';
 
 describe('📝 main exports', () => {
diff --git a/test/test.retry.ts b/test/test.retry.ts
index 15d8ffa..88f61ed 100644
--- a/test/test.retry.ts
+++ b/test/test.retry.ts
@@ -14,9 +14,9 @@
 import {AbortController} from 'abort-controller';
 import assert from 'assert';
 import nock from 'nock';
+import {describe, it, afterEach} from 'mocha';
 import {Gaxios, GaxiosError, GaxiosOptions, request} from '../src';
-
-const assertRejects = require('assert-rejects');
+import assertRejects = require('assert-rejects');
 
 nock.disableNetConnect();
 
diff --git a/tslint.json b/tslint.json
deleted file mode 100644
index 27872a1..0000000
--- a/tslint.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "extends": "gts/tslint.json",
-  "linterOptions": {
-    "exclude": [
-      "**/*.json"
-    ]
-  }
-}
diff --git a/webpack-tests.config.js b/webpack-tests.config.js
index 8642393..d903551 100644
--- a/webpack-tests.config.js
+++ b/webpack-tests.config.js
@@ -20,27 +20,27 @@ module.exports = {
   resolve: {
     extensions: ['.ts', '.js', '.json'],
     alias: {
-      '../../package.json': path.resolve(__dirname, 'package.json')
-    }
+      '../../package.json': path.resolve(__dirname, 'package.json'),
+    },
   },
   node: {
     child_process: 'empty',
     fs: 'empty',
-    crypto: 'empty'
+    crypto: 'empty',
   },
   module: {
     rules: [
       {
         test: /node_modules\/https-proxy-agent\//,
-        use: 'null-loader'
+        use: 'null-loader',
       },
       {
         test: /\.ts$/,
         use: 'ts-loader',
-        exclude: /node_modules/
-      }
-    ]
+        exclude: /node_modules/,
+      },
+    ],
   },
   mode: 'production',
-  plugins: []
+  plugins: [],
 };
diff --git a/webpack.config.js b/webpack.config.js
index 20812cd..012df50 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -21,32 +21,32 @@ module.exports = {
   resolve: {
     extensions: ['.ts', '.js', '.json'],
     alias: {
-      '../../package.json': path.resolve(__dirname, 'package.json')
-    }
+      '../../package.json': path.resolve(__dirname, 'package.json'),
+    },
   },
   output: {
     library: 'gaxios',
     filename: 'gaxios.min.js',
-    path: path.resolve(__dirname, 'dist')
+    path: path.resolve(__dirname, 'dist'),
   },
   node: {
     child_process: 'empty',
     fs: 'empty',
-    crypto: 'empty'
+    crypto: 'empty',
   },
   module: {
     rules: [
       {
         test: /node_modules\/https-proxy-agent\//,
-        use: 'null-loader'
+        use: 'null-loader',
       },
       {
         test: /\.ts$/,
         use: 'ts-loader',
-        exclude: /node_modules/
-      }
-    ]
+        exclude: /node_modules/,
+      },
+    ],
   },
   mode: 'production',
-  plugins: []
+  plugins: [],
 };