diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d9bfdf490..d65181fe5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,22 @@
 name: build
 
-on: [push, pull_request]
+on:
+    pull_request:
+      paths-ignore:
+        - 'docs/**'
+        - 'README.md'
+        - 'CHANGELOG.md'
+        - '.gitignore'
+        - '.gitattributes'
+
+    push:
+      branches: ['master']
+      paths-ignore:
+        - 'docs/**'
+        - 'README.md'
+        - 'CHANGELOG.md'
+        - '.gitignore'
+        - '.gitattributes'
 
 env:
     DEFAULT_COMPOSER_FLAGS: "--prefer-dist --no-interaction --no-progress --optimize-autoloader --ansi"
@@ -23,7 +39,7 @@ jobs:
             fail-fast: false
             matrix:
                 os: [ubuntu-latest]
-                php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+                php: ['7.3', '7.4', '8.1', '8.2', '8.3']
 
         steps:
             - name: Checkout
diff --git a/composer.json b/composer.json
index 5483367b5..0b9f4f660 100644
--- a/composer.json
+++ b/composer.json
@@ -23,13 +23,13 @@
     ],
     "minimum-stability": "dev",
     "require": {
+        "php": ">=7.3",
         "yiisoft/yii2": "~2.0.46",
         "phpspec/php-diff": "^1.1.0"
     },
     "require-dev": {
         "yiisoft/yii2-coding-standards": "~2.0",
-        "cweagans/composer-patches": "^1.7",
-        "phpunit/phpunit": "4.8.34"
+        "phpunit/phpunit": "^9.6"
     },
     "autoload": {
         "psr-4": {
@@ -44,20 +44,6 @@
     "extra": {
         "branch-alias": {
             "dev-master": "2.0.x-dev"
-        },
-        "composer-exit-on-patch-failure": true,
-        "patches": {
-            "phpunit/phpunit-mock-objects": {
-                "Fix PHP 7 and 8 compatibility": "https://yiisoft.github.io/phpunit-patches/phpunit_mock_objects.patch"
-            },
-            "phpunit/php-file-iterator": {
-                "Fix PHP 8.1 compatibility": "https://yiisoft.github.io/phpunit-patches/phpunit_path_file_iterator.patch"
-            },
-            "phpunit/phpunit": {
-                "Fix PHP 7 compatibility": "https://yiisoft.github.io/phpunit-patches/phpunit_php7.patch",
-                "Fix PHP 8 compatibility": "https://yiisoft.github.io/phpunit-patches/phpunit_php8.patch",
-                "Fix PHP 8.1 compatibility": "https://yiisoft.github.io/phpunit-patches/phpunit_php81.patch"
-            }
         }
     },
     "config": {
@@ -66,7 +52,6 @@
             "enabled": false
         },
         "allow-plugins": {
-            "cweagans/composer-patches": true,
             "yiisoft/yii2-composer": true
         }
     },
diff --git a/tests/GiiTestCase.php b/tests/GiiTestCase.php
index f390ee6ea..e5138186e 100644
--- a/tests/GiiTestCase.php
+++ b/tests/GiiTestCase.php
@@ -13,7 +13,7 @@ class GiiTestCase extends TestCase
 {
     protected $driverName = 'sqlite';
 
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
@@ -49,4 +49,4 @@ protected function setUp()
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
index e6d111520..fda7843de 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -15,7 +15,7 @@ abstract class TestCase extends \PHPUnit\Framework\TestCase
      * Clean up after test.
      * By default the application created with [[mockApplication]] will be destroyed.
      */
-    protected function tearDown()
+    protected function tearDown(): void
     {
         parent::tearDown();
         $this->destroyApplication();
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index a9b8059a4..a9dd30f9c 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -13,5 +13,3 @@
 
 Yii::setAlias('@yiiunit/gii', __DIR__);
 Yii::setAlias('@yii/gii', dirname(__DIR__) . '/src');
-
-require_once(__DIR__ . '/compatibility.php');
\ No newline at end of file
diff --git a/tests/compatibility.php b/tests/compatibility.php
deleted file mode 100644
index d27c0ef1c..000000000
--- a/tests/compatibility.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-/*
- * Ensures compatibility with PHPUnit < 6.x
- */
-
-namespace PHPUnit\Framework\Constraint {
-
-    if (!class_exists('PHPUnit\Framework\Constraint\Constraint') && class_exists('PHPUnit_Framework_Constraint')) {
-        abstract class Constraint extends \PHPUnit_Framework_Constraint
-        {
-        }
-    }
-}
-
-namespace PHPUnit\Framework {
-
-    if (!class_exists('PHPUnit\Framework\TestCase') && class_exists('PHPUnit_Framework_TestCase')) {
-        abstract class TestCase extends \PHPUnit_Framework_TestCase
-        {
-            /**
-             * @param string $exception
-             */
-            public function expectException($exception)
-            {
-                $this->setExpectedException($exception);
-            }
-
-            /**
-             * @param string $message
-             */
-            public function expectExceptionMessage($message)
-            {
-                $this->setExpectedException($this->getExpectedException(), $message);
-            }
-        }
-    }
-}