diff --git a/composer.json b/composer.json
index 530ad49..4367dc4 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
 		"phpstan/phpstan": "^2.1",
 		"phpunit/phpunit": "^10.1",
 		"phpmd/phpmd": "^2.13",
-		"squizlabs/php_codesniffer": "^3.7"
+		"squizlabs/php_codesniffer": "^4.0"
 	},
 
 	"autoload": {
diff --git a/composer.lock b/composer.lock
index f9abae1..6a893d4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8884c4422b28535b685064878fd2d229",
+    "content-hash": "68a55eb49612b9a53dde693c60aedcda",
     "packages": [
         {
             "name": "phpgt/promise",
@@ -2125,26 +2125,31 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.13.6",
+            "version": "4.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCSStandards/PHP_CodeSniffer.git",
-                "reference": "4c378e1a528ea066890fc2397cbdd2f94eb2fc91"
+                "reference": "bbdc3d0532623e21838b7041a4364383a8126f96"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/4c378e1a528ea066890fc2397cbdd2f94eb2fc91",
-                "reference": "4c378e1a528ea066890fc2397cbdd2f94eb2fc91",
+                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/bbdc3d0532623e21838b7041a4364383a8126f96",
+                "reference": "bbdc3d0532623e21838b7041a4364383a8126f96",
                 "shasum": ""
             },
             "require": {
+                "ext-libxml": "*",
                 "ext-simplexml": "*",
                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
-                "php": ">=5.4.0"
+                "php": ">=7.2.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0 || ^9.3.4"
+                "phpunit/phpunit": "^8.4.0 || ^9.3.4 || ^10.5.32 || 11.3.3 - 11.5.28 || ^11.5.31"
+            },
+            "suggest": {
+                "ext-iconv": "For accurate character length calculation when the checked files contain multi-byte characters.",
+                "ext-pcntl": "For parallel processing support via the --parallel CLI option."
             },
             "bin": [
                 "bin/phpcbf",
@@ -2169,7 +2174,7 @@
                     "homepage": "https://github.com/PHPCSStandards/PHP_CodeSniffer/graphs/contributors"
                 }
             ],
-            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "description": "PHP_CodeSniffer tokenizes PHP files and detects violations of a defined set of coding standards.",
             "homepage": "https://github.com/PHPCSStandards/PHP_CodeSniffer",
             "keywords": [
                 "phpcs",
@@ -2200,7 +2205,7 @@
                     "type": "thanks_dev"
                 }
             ],
-            "time": "2026-08-06T00:17:32+00:00"
+            "time": "2026-08-06T02:45:27+00:00"
         },
         {
             "name": "symfony/config",
diff --git a/test/phpunit/Timer/IndividualTimerTest.php b/test/phpunit/Timer/IndividualTimerTest.php
index be9e254..9d8cec4 100644
--- a/test/phpunit/Timer/IndividualTimerTest.php
+++ b/test/phpunit/Timer/IndividualTimerTest.php
@@ -6,24 +6,19 @@
 
 class IndividualTimerTest extends TestCase {
 	public function testConstructWithFutureTime() {
-		$epoch = microtime(true);
-		$epochPlus5s = $epoch + 5;
+		$before = microtime(true) + 5;
 		$sut = new IndividualTimer(5);
-		self::assertEquals(
-// The timer must be scheduled within one hundredth of a second of the expectation:
-			round($epochPlus5s, 2),
-			round($sut->getNextRunTime(), 2)
-		);
+		$after = microtime(true) + 5;
+		self::assertGreaterThanOrEqual($before, $sut->getNextRunTime());
+		self::assertLessThanOrEqual($after, $sut->getNextRunTime());
 	}
 
 	public function testConstructWithPastTime() {
-		$epoch = microtime(true);
-		$epochMinus5s = $epoch - 5;
+		$before = microtime(true) - 5;
 		$sut = new IndividualTimer(-5);
-		self::assertEquals(
-			round($epochMinus5s, 2),
-			round($sut->getNextRunTime(), 2)
-		);
+		$after = microtime(true) - 5;
+		self::assertGreaterThanOrEqual($before, $sut->getNextRunTime());
+		self::assertLessThanOrEqual($after, $sut->getNextRunTime());
 	}
 
 	public function testTickWithFutureTime() {