diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..ca4a9bf
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,62 @@
+name: Build
+
+on:
+  push:
+  pull_request:
+
+defaults:
+  run:
+    shell: bash
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+
+  tests:
+    name: Tests
+    env:
+      extensions: pcov
+
+    strategy:
+      matrix:
+        include:
+          - php: '8.0'
+          - php: '8.1'
+          - php: '8.2'
+      fail-fast: true
+
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          coverage: "none"
+          ini-values: date.timezone=Asia/Bangkok,memory_limit=-1,default_socket_timeout=10,session.gc_probability=0,zend.assertions=1
+          php-version: "${{ matrix.php }}"
+          extensions: "${{ env.extensions }}"
+          tools: flex
+
+      - name: Before run
+        run: |
+          echo COLUMNS=120 >> $GITHUB_ENV
+          for P in src tests; do find $P -type f -name '*.php' -exec php -l {} \;; done
+
+      - name: Install dependencies
+        run: composer install --no-progress --ansi -o
+
+      - name: Run tests
+        run: composer test:cov
+
+      - name: Codecov
+        run: bash <(curl -s https://codecov.io/bash)
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 8fb96f6..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-language: php
-
-php:
-  - 8.0
-  - 8.1
-
-install:
-  - composer install --prefer-dist
-
-before_script:
-  - for P in src tests; do find $P -type f -name '*.php' -exec php -l {} \;; done
-
-script:
-  - composer test:cov
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
diff --git a/src/Helper/Shell.php b/src/Helper/Shell.php
index c45ec30..2d57bf3 100644
--- a/src/Helper/Shell.php
+++ b/src/Helper/Shell.php
@@ -58,8 +58,8 @@ class Shell
     /** @var resource The actual process resource returned from proc_open */
     protected $process = null;
 
-    /** @var int Process starting time in unix timestamp */
-    protected int $processStartTime = 0;
+    /** @var float Process starting time in unix timestamp */
+    protected float $processStartTime = 0;
 
     /** @var array Status of the process as returned from proc_get_status */
     protected ?array $processStatus = null;
@@ -104,7 +104,7 @@ protected function isWindows(): bool
 
     protected function setInput(): void
     {
-        \fwrite($this->pipes[self::STDIN_DESCRIPTOR_KEY], $this->input);
+        \fwrite($this->pipes[self::STDIN_DESCRIPTOR_KEY], $this->input ?? '');
     }
 
     protected function updateProcessStatus(): void
diff --git a/src/Output/Writer.php b/src/Output/Writer.php
index 23e691f..54add92 100644
--- a/src/Output/Writer.php
+++ b/src/Output/Writer.php
@@ -200,7 +200,7 @@ public function colorizer(): Color
      */
     public function __get(string $name): self
     {
-        if (\strpos($this->method, $name) === false) {
+        if ($this->method === null || !\str_contains($this->method, $name)) {
             $this->method .= $this->method ? \ucfirst($name) : $name;
         }