diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 37edaacb7..000000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-# This config is equivalent to both the '.circleci/extended/orb-free.yml' and the base '.circleci/config.yml'
-version: 2.1
-
-# Orbs are reusable packages of CircleCI configuration that you may share across projects, enabling you to create encapsulated, parameterized commands, jobs, and executors that can be used across multiple projects.
-# See: https://circleci.com/docs/2.0/orb-intro/
-orbs:
-  node: circleci/node@4.7
-
-# Invoke jobs via workflows
-# See: https://circleci.com/docs/2.0/configuration-reference/#workflows
-workflows:
-  sample: # This is the name of the workflow, feel free to change it to better match your workflow.
-    # Inside the workflow, you define the jobs you want to run.
-    jobs:
-      - node/test:
-          # This is the node version to use for the `cimg/node` tag
-          # Relevant tags can be found on the CircleCI Developer Hub
-          # https://circleci.com/developer/images/image/cimg/node
-          version: '16.10'
-          # If you are using yarn, change the line below from "npm" to "yarn"
-          pkg-manager: npm
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 000000000..bda819ec8
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,26 @@
+name: Node CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [12.x, 14.x, 16.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: npm install, test
+      run: |
+        npm install
+        npm test
+      env:
+        CI: true
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6e3f9e51f..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-language: node_js
-node_js:
-  - '10'
-  - '12'
-  - '13'
-cache:
-  bundler: true
-  directories:
-  - node_modules # NPM package
-before_script:
-  - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
-  - chmod +x ./cc-test-reporter
-  - ./cc-test-reporter before-build
-notifications:
-  email: false
-  webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/f1d48355795bf25a8f9a
-    on_success: change
-    on_failure: always
-    on_start: never
-script: npm test
-after_success: cat /home/travis/build/glayzzle/php-parser/coverage/lcov.info | /home/travis/build/glayzzle/php-parser/node_modules/coveralls/bin/coveralls.js
-after_script:
-  - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
diff --git a/jest.config.js b/jest.config.js
index caa281737..7d0ad8555 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -5,19 +5,27 @@ const ENABLE_COVERAGE = !!process.env.CI || !!process.env.COVERAGE;
 module.exports = {
   collectCoverage: ENABLE_COVERAGE,
   coverageDirectory: "coverage/",
+  coverageThreshold: {
+    global: {
+      statements: 95.6,
+      branches: 89.6,
+      functions: 99,
+      lines: 96.1,
+    },
+  },
   projects: [
     {
       displayName: "test",
       testEnvironment: "node",
     },
-    //{
-    //  runner: "jest-runner-eslint",
-    //  displayName: "lint",
-    //  testMatch: ["<rootDir>/**/*.js"],
-    //  testPathIgnorePatterns: [
-    //    "<rootDir>/node_modules/",
-    //    "<rootDir>/coverage/",
-    //  ],
-    //},
+    {
+      runner: "jest-runner-eslint",
+      displayName: "lint",
+      testMatch: ["<rootDir>/**/*.js"],
+      testPathIgnorePatterns: [
+        "<rootDir>/node_modules/",
+        "<rootDir>/coverage/",
+      ],
+    },
   ],
 };
diff --git a/src/ast.js b/src/ast.js
index 93e8b704b..4ddbdb897 100644
--- a/src/ast.js
+++ b/src/ast.js
@@ -475,7 +475,7 @@ AST.prototype.prepare = function (kind, docs, parser) {
 AST.prototype.checkNodes = function () {
   const errors = [];
   for (const k in AST.stack) {
-    if (AST.stack.hasOwnProperty(k)) {
+    if (Object.prototype.hasOwnProperty.call(AST.stack, k)) {
       errors.push(AST.stack[k]);
     }
   }
diff --git a/src/index.js b/src/index.js
index d3aaec4fa..4818721d3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -213,7 +213,7 @@ Engine.prototype.tokenGetAll = function (buffer) {
   const result = [];
   while (token != EOF) {
     let entry = this.lexer.yytext;
-    if (names.hasOwnProperty(token)) {
+    if (Object.prototype.hasOwnProperty.call(names, token)) {
       entry = [names[token], entry, this.lexer.yylloc.first_line];
     }
     result.push(entry);
diff --git a/src/parser.js b/src/parser.js
index 946939d4e..733ff213b 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -615,7 +615,12 @@ Parser.prototype.lex = function () {
       this.token = this.lexer.lex() || this.EOF;
       if (this.token === this.EOF) return this;
       let entry = this.lexer.yytext;
-      if (this.lexer.engine.tokens.values.hasOwnProperty(this.token)) {
+      if (
+        Object.prototype.hasOwnProperty.call(
+          this.lexer.engine.tokens.values,
+          this.token
+        )
+      ) {
         entry = [
           this.lexer.engine.tokens.values[this.token],
           entry,
@@ -686,7 +691,7 @@ Parser.prototype.is = function (type) {
   require("./parser/variable.js"),
 ].forEach(function (ext) {
   for (const k in ext) {
-    if (Parser.prototype.hasOwnProperty(k)) {
+    if (Object.prototype.hasOwnProperty.call(Parser.prototype, k)) {
       // @see https://github.com/glayzzle/php-parser/issues/234
       throw new Error("Function " + k + " is already defined - collision");
     }