diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000000..f9f03214300
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,24 @@
+# Ignore node_modules
+node_modules
+
+# Ignore some folders
+benchmark
+coverage
+
+# Ignore not support files
+!.*.js
+.eslintrc.js
+*.d.ts
+
+# Ignore some test files
+test/*
+!test/*Cases
+!test/helpers
+!test/*.js
+test/*Cases/**/*.js
+!test/*Cases/**/webpack.config.js
+
+# Ignore some examples files
+examples/**/*.js
+!examples/*/webpack.config.js
+
diff --git a/.eslintrc.js b/.eslintrc.js
index 8f7b5b0426e..69f411216f8 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -55,12 +55,15 @@ module.exports = {
 		jsdoc: {
 			// supported tags https://github.com/microsoft/TypeScript-wiki/blob/master/JSDoc-support-in-JavaScript.md
 			tagNamePreference: {
-				...(['implements', 'const', 'memberof', 'readonly', 'yields'].reduce((acc, tag) => {
-					acc[tag] = {
-						message: `@${tag} currently not supported in Typescript`
-					};
-					return acc;
-				}, {})),
+				...["implements", "const", "memberof", "readonly", "yields"].reduce(
+					(acc, tag) => {
+						acc[tag] = {
+							message: `@${tag} currently not supported in Typescript`
+						};
+						return acc;
+					},
+					{}
+				),
 				extends: "extends",
 				return: "returns",
 				constructor: "constructor",
diff --git a/package.json b/package.json
index 4e2df4086a9..734cfd773aa 100644
--- a/package.json
+++ b/package.json
@@ -120,12 +120,12 @@
     "pretest": "yarn lint",
     "prelint": "yarn setup",
     "lint": "yarn code-lint && yarn jest-lint && yarn type-lint && yarn special-lint",
-    "code-lint": "eslint --cache \"{setup,lib,bin,hot,buildin,benchmark,tooling,schemas}/**/*.js\" \"test/*.js\" \"test/{configCases,watchCases,statsCases,hotCases}/**/webpack.config.js\" \"examples/**/webpack.config.js\"",
+    "code-lint": "eslint . --ext '.js' --cache",
     "type-lint": "tsc --pretty",
     "special-lint": "node tooling/inherit-types && node tooling/format-schemas && node tooling/compile-to-definitions",
     "special-lint-fix": "node tooling/inherit-types --write --override && node tooling/format-schemas --write && node tooling/compile-to-definitions --write",
     "fix": "yarn code-lint --fix && yarn special-lint-fix",
-    "pretty": "prettier --loglevel warn --write \"*.{ts,js,json,yml,yaml}\" \"{setup,lib,bin,hot,buildin,benchmark,tooling,schemas}/**/*.{js,json}\" \"test/*.js\" \"test/{configCases,watchCases,statsCases,hotCases}/**/webpack.config.js\" \"examples/**/webpack.config.js\"",
+    "pretty": "prettier --loglevel warn --write \"*.{ts,js,json,yml,yaml}\" \"{setup,lib,bin,hot,buildin,benchmark,tooling,schemas}/**/*.{js,json}\" \"test/*.js\" \"test/helpers/*.js\" \"test/{configCases,watchCases,statsCases,hotCases}/**/webpack.config.js\" \"examples/**/webpack.config.js\"",
     "jest-lint": "node --max-old-space-size=4096 node_modules/jest-cli/bin/jest --testMatch \"<rootDir>/test/*.lint.js\" --no-verbose",
     "benchmark": "node --max-old-space-size=4096 --trace-deprecation node_modules/jest-cli/bin/jest --testMatch \"<rootDir>/test/*.benchmark.js\" --runInBand",
     "cover": "yarn cover:all && yarn cover:report",
diff --git a/test/helpers/PluginEnvironment.js b/test/helpers/PluginEnvironment.js
index 1b7ad46d728..456517780a9 100644
--- a/test/helpers/PluginEnvironment.js
+++ b/test/helpers/PluginEnvironment.js
@@ -22,27 +22,30 @@ module.exports = function PluginEnvironment() {
 			// In the meanwhile, `hooks` is a `Proxy` which creates fake hooks
 			// on demand. Instead of creating a dummy object with a few `Hook`
 			// method, a custom `Hook` class could be used.
-			hooks: new Proxy({}, {
-				get(target, hookName) {
-					let hook = hooks.get(hookName);
-					if (hook === undefined) {
-						const eventName = getEventName(hookName);
-						hook = {
-							tap(_, handler) {
-								addEvent(eventName, handler);
-							},
-							tapAsync(_, handler) {
-								addEvent(eventName, handler);
-							},
-							tapPromise(_, handler) {
-								addEvent(eventName, handler);
-							}
-						};
-						hooks.set(hookName, hook);
+			hooks: new Proxy(
+				{},
+				{
+					get(target, hookName) {
+						let hook = hooks.get(hookName);
+						if (hook === undefined) {
+							const eventName = getEventName(hookName);
+							hook = {
+								tap(_, handler) {
+									addEvent(eventName, handler);
+								},
+								tapAsync(_, handler) {
+									addEvent(eventName, handler);
+								},
+								tapPromise(_, handler) {
+									addEvent(eventName, handler);
+								}
+							};
+							hooks.set(hookName, hook);
+						}
+						return hook;
 					}
-					return hook;
 				}
-			})
+			)
 		};
 	};
 
diff --git a/test/helpers/TemplatePluginEnvironment.js b/test/helpers/TemplatePluginEnvironment.js
index b852c0c2151..2e9c34cc382 100644
--- a/test/helpers/TemplatePluginEnvironment.js
+++ b/test/helpers/TemplatePluginEnvironment.js
@@ -1,4 +1,4 @@
-var PluginEnvironment = require('./PluginEnvironment');
+var PluginEnvironment = require("./PluginEnvironment");
 
 module.exports = function TemplatePluginEnvironment() {
 	var events = [];
diff --git a/test/helpers/applyPluginWithOptions.js b/test/helpers/applyPluginWithOptions.js
index 47a82cb1567..844d580af28 100644
--- a/test/helpers/applyPluginWithOptions.js
+++ b/test/helpers/applyPluginWithOptions.js
@@ -1,11 +1,11 @@
-var PluginEnvironment = require('./PluginEnvironment');
+var PluginEnvironment = require("./PluginEnvironment");
 
 module.exports = function applyPluginWithOptions(Plugin) {
-	var plugin = new (Function.prototype.bind.apply(Plugin, arguments));
+	var plugin = new (Function.prototype.bind.apply(Plugin, arguments))();
 	var pluginEnvironment = new PluginEnvironment();
 	plugin.apply(pluginEnvironment.getEnvironmentStub());
 
-	var env = (this === global) ? {} : this;
+	var env = this === global ? {} : this;
 	env.plugin = plugin;
 	env.pluginEnvironment = pluginEnvironment;
 
diff --git a/test/helpers/createLazyTestEnv.js b/test/helpers/createLazyTestEnv.js
index 813e232bbae..9f052df9c5c 100644
--- a/test/helpers/createLazyTestEnv.js
+++ b/test/helpers/createLazyTestEnv.js
@@ -72,7 +72,7 @@ module.exports = (env, globalTimeout = 2000, nameSuffix = "") => {
 			fn = createOnceFn(fn);
 			numberOfTests++;
 			let spec;
-			if(fn) {
+			if (fn) {
 				spec = env.fit(title, fn, timeout);
 			} else {
 				spec = env.fit(title, () => {});
diff --git a/test/helpers/remove.js b/test/helpers/remove.js
index 747e9302dae..efa4f64f5d8 100644
--- a/test/helpers/remove.js
+++ b/test/helpers/remove.js
@@ -1,3 +1,6 @@
+const fs = require("fs");
+const path = require("path");
+
 module.exports.remove = function remove(src) {
 	if (!fs.existsSync(src)) return;
 	const files = fs.readdirSync(src);
@@ -10,4 +13,4 @@ module.exports.remove = function remove(src) {
 			fs.unlinkSync(srcFile);
 		}
 	});
-}
+};
diff --git a/test/helpers/supportDefaultAssignment.js b/test/helpers/supportDefaultAssignment.js
index 598c2cef9fc..4a714a48821 100644
--- a/test/helpers/supportDefaultAssignment.js
+++ b/test/helpers/supportDefaultAssignment.js
@@ -1,9 +1,10 @@
 module.exports = function supportDefaultAssignment() {
 	try {
-		var E = eval("class E { toString() { return 'default' } }")
-		var f1 = eval("(function f1({a, b = E}) {return new b().toString();})")
-		return f1({a: "test"}) === "default" ;
-	} catch(e) {
+		// eslint-disable-next-line no-unused-vars
+		var E = eval("class E { toString() { return 'default' } }");
+		var f1 = eval("(function f1({a, b = E}) {return new b().toString();})");
+		return f1({ a: "test" }) === "default";
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsArrowFunctionExpression.js b/test/helpers/supportsArrowFunctionExpression.js
index a3d9932c729..e325c33606e 100644
--- a/test/helpers/supportsArrowFunctionExpression.js
+++ b/test/helpers/supportsArrowFunctionExpression.js
@@ -1,8 +1,10 @@
 module.exports = function supportArrowFunctionExpression() {
 	try {
-		eval("var foo = function(fn) {return fn.toString()}; foo(() => {return 'a'})");
+		eval(
+			"var foo = function(fn) {return fn.toString()}; foo(() => {return 'a'})"
+		);
 		return true;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsBlockScoping.js b/test/helpers/supportsBlockScoping.js
index e6d0fb44883..86f7330c5f1 100644
--- a/test/helpers/supportsBlockScoping.js
+++ b/test/helpers/supportsBlockScoping.js
@@ -1,8 +1,10 @@
 module.exports = function supportsBlockScoping() {
 	try {
-		var f = eval("(function f() { const x = 1; if (true) { const x = 2; } return x; })");
+		var f = eval(
+			"(function f() { const x = 1; if (true) { const x = 2; } return x; })"
+		);
 		return f() === 1;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsDefaultArgs.js b/test/helpers/supportsDefaultArgs.js
index b20a6e1b685..e74cd97ed20 100644
--- a/test/helpers/supportsDefaultArgs.js
+++ b/test/helpers/supportsDefaultArgs.js
@@ -2,7 +2,7 @@ module.exports = function supportsDefaultArgs() {
 	try {
 		var f = eval("(function f(a = 123) { return a; })");
 		return f() === 123;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsES6.js b/test/helpers/supportsES6.js
index d7631f1ab4e..15857d9f52d 100644
--- a/test/helpers/supportsES6.js
+++ b/test/helpers/supportsES6.js
@@ -2,7 +2,7 @@ module.exports = function supportsES6() {
 	try {
 		eval("class A {}");
 		return true;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsForOf.js b/test/helpers/supportsForOf.js
index 332fddffe65..3411344fafb 100644
--- a/test/helpers/supportsForOf.js
+++ b/test/helpers/supportsForOf.js
@@ -1,8 +1,8 @@
 module.exports = function supportDefaultAssignment() {
 	try {
 		var f = eval("(function f() { for(var x of ['ok', 'fail']) return x; })");
-		return f() === "ok" ;
-	} catch(e) {
+		return f() === "ok";
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsIteratorDestructuring.js b/test/helpers/supportsIteratorDestructuring.js
index 8a604f15820..8945732f396 100644
--- a/test/helpers/supportsIteratorDestructuring.js
+++ b/test/helpers/supportsIteratorDestructuring.js
@@ -2,7 +2,7 @@ module.exports = function supportsIteratorDestructuring() {
 	try {
 		var f = eval("(function f([, x, ...y]) { return x; })");
 		return f([1, 2]) === 2;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsObjectDestructuring.js b/test/helpers/supportsObjectDestructuring.js
index c3be9e86d21..f60fcd52038 100644
--- a/test/helpers/supportsObjectDestructuring.js
+++ b/test/helpers/supportsObjectDestructuring.js
@@ -2,7 +2,7 @@ module.exports = function supportsObjectDestructuring() {
 	try {
 		var f = eval("(function f({x, y}) { return x + y; })");
 		return f({ x: 1, y: 2 }) === 3;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsOptionalCatchBinding.js b/test/helpers/supportsOptionalCatchBinding.js
index 8e3edbfb254..5fdeeca45c6 100644
--- a/test/helpers/supportsOptionalCatchBinding.js
+++ b/test/helpers/supportsOptionalCatchBinding.js
@@ -2,7 +2,7 @@ module.exports = function supportsOptionalCatchBinding() {
 	try {
 		eval("try {} catch {}");
 		return true;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsSpread.js b/test/helpers/supportsSpread.js
index 3ea317b61e6..76c10b204fa 100644
--- a/test/helpers/supportsSpread.js
+++ b/test/helpers/supportsSpread.js
@@ -1,9 +1,10 @@
 module.exports = function supportsSpread() {
 	try {
-		var x = { a: true }, y; // eslint-disable-line no-unused-vars
+		var x = { a: true },
+			y; // eslint-disable-line no-unused-vars
 		eval("y = { ...x }");
 		return y !== x && y.a;
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsTemplateStrings.js b/test/helpers/supportsTemplateStrings.js
index 7c310eab89a..abfefd0ec6a 100644
--- a/test/helpers/supportsTemplateStrings.js
+++ b/test/helpers/supportsTemplateStrings.js
@@ -2,7 +2,7 @@ module.exports = function supportsTemplateStrings() {
 	try {
 		var f = eval("(function f() { return String.raw`a\\b`; })");
 		return f() === "a\\b";
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };
diff --git a/test/helpers/supportsWebAssembly.js b/test/helpers/supportsWebAssembly.js
index 51cbdbb573a..6eaf5259b7a 100644
--- a/test/helpers/supportsWebAssembly.js
+++ b/test/helpers/supportsWebAssembly.js
@@ -1,7 +1,7 @@
 module.exports = function supportsWebAssembly() {
 	try {
 		return typeof WebAssembly !== "undefined";
-	} catch(e) {
+	} catch (e) {
 		return false;
 	}
 };