diff --git a/bin/code-style.sh b/bin/code-style.sh
index b94e7ab..24b397d 100755
--- a/bin/code-style.sh
+++ b/bin/code-style.sh
@@ -5,6 +5,11 @@ cd $(dirname $0)/..
 ARG="$1"
 [[ $ARG == "--fix" ]] && COMMAND="fix" || COMMAND="check"
 
+# php-cs-fixer may lag behind with supporting newest versions of PHP and
+# would complain when running under them, which would needlessly fail our
+# GitHub Action. So we'll tell php-cs-fixer to skip that check.
+export PHP_CS_FIXER_IGNORE_ENV=1
+
 ./vendor/bin/php-cs-fixer $COMMAND --diff -vvv
 EXITCODE=$?
 
diff --git a/src/AsyncResult.php b/src/AsyncResult.php
index 3298ea7..e3758a6 100644
--- a/src/AsyncResult.php
+++ b/src/AsyncResult.php
@@ -4,12 +4,11 @@
 
 namespace Smuuf\CeleryForPhp;
 
-use Smuuf\CeleryForPhp\TaskMetaResult;
 use Smuuf\CeleryForPhp\Exc\RuntimeException;
 use Smuuf\CeleryForPhp\Exc\CeleryTaskException;
 use Smuuf\CeleryForPhp\Exc\CeleryTimeoutException;
 use Smuuf\CeleryForPhp\Exc\InvalidArgumentException;
-use Smuuf\CeleryForPhp\Helpers\Functions as Functions;
+use Smuuf\CeleryForPhp\Helpers\Functions;
 use Smuuf\CeleryForPhp\Helpers\Signals;
 use Smuuf\CeleryForPhp\Interfaces\IAsyncResult;
 use Smuuf\CeleryForPhp\Interfaces\IResultBackend;
diff --git a/src/Config.php b/src/Config.php
index 8f8b287..a633c2c 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -14,10 +14,16 @@ class Config {
 	use StrictObject;
 
 	public static function createDefault(): self {
-		return new self;
+		return new self();
 	}
 
 	/**
+	 * @param int $taskMessageProtocolVersion
+	 *     Celery task message protocol version to use.
+	 *     See https://docs.celeryq.dev/en/stable/internals/protocol.html
+	 * @param ISerializer $taskSerializer
+	 *     Serializer to use when serializing task message body. If not
+	 *     specified, `JsonSerializer` is used by default.
 	 * @param null|ITaskIdFactory $taskIdFactory
 	 *     Optional custom task ID builder. If not specified, a default
 	 *     factory will be used.
@@ -25,12 +31,6 @@ public static function createDefault(): self {
 	 *     Name of the Celery control exchange (used for sending control commands,
 	 *     such as 'revoke', to Celery workers).
 	 *     Default value is 'celery' but can be specified to some other name.
-	 * @param int $taskMessageProtocolVersion
-	 *     Celery task message protocol version to use.
-	 *     See https://docs.celeryq.dev/en/stable/internals/protocol.html
-	 * @param ISerializer $taskSerializer
-	 *     Serializer to use when serializing task message body. If not
-	 *     specified, `JsonSerializer` is used by default.
 	 */
 	public function __construct(
 		private int $taskMessageProtocolVersion = MessageBuilder::MESSAGE_PROTOCOL_V2,
diff --git a/src/Exc/CeleryTimeoutException.php b/src/Exc/CeleryTimeoutException.php
index c814819..c10029f 100644
--- a/src/Exc/CeleryTimeoutException.php
+++ b/src/Exc/CeleryTimeoutException.php
@@ -2,6 +2,4 @@
 
 namespace Smuuf\CeleryForPhp\Exc;
 
-class CeleryTimeoutException extends \RuntimeException implements ICeleryForPhpException {
-
-}
+class CeleryTimeoutException extends \RuntimeException implements ICeleryForPhpException {}
diff --git a/src/Exc/ICeleryForPhpException.php b/src/Exc/ICeleryForPhpException.php
index 31a9d7c..691c6be 100644
--- a/src/Exc/ICeleryForPhpException.php
+++ b/src/Exc/ICeleryForPhpException.php
@@ -2,6 +2,4 @@
 
 namespace Smuuf\CeleryForPhp\Exc;
 
-interface ICeleryForPhpException extends \Throwable {
-
-}
+interface ICeleryForPhpException extends \Throwable {}
diff --git a/src/Exc/InvalidArgumentException.php b/src/Exc/InvalidArgumentException.php
index 00f4b00..0def2e0 100644
--- a/src/Exc/InvalidArgumentException.php
+++ b/src/Exc/InvalidArgumentException.php
@@ -2,6 +2,4 @@
 
 namespace Smuuf\CeleryForPhp\Exc;
 
-class InvalidArgumentException extends \LogicException implements ICeleryForPhpException {
-
-}
+class InvalidArgumentException extends \LogicException implements ICeleryForPhpException {}
diff --git a/src/Exc/RuntimeException.php b/src/Exc/RuntimeException.php
index 0dcad38..aa1e1f4 100644
--- a/src/Exc/RuntimeException.php
+++ b/src/Exc/RuntimeException.php
@@ -2,6 +2,4 @@
 
 namespace Smuuf\CeleryForPhp\Exc;
 
-class RuntimeException extends \RuntimeException implements ICeleryForPhpException {
-
-}
+class RuntimeException extends \RuntimeException implements ICeleryForPhpException {}
diff --git a/src/Helpers/Functions.php b/src/Helpers/Functions.php
index 5b0c5db..208768f 100644
--- a/src/Helpers/Functions.php
+++ b/src/Helpers/Functions.php
@@ -15,16 +15,16 @@ public static function monotonicTime(): float {
 
 	/**
 	 * Build a random UUID v4.
-	 * Thanks to https://stackoverflow.com/a/15875555/1285669
+	 * Thanks to https://stackoverflow.com/a/15875555/1285669.
 	 */
 	public static function uuid4(): string {
 
 		$data = random_bytes(16);
 
 		// Set version to 01006.
-		$data[6] = chr(ord($data[6]) & 0x0f | 0x40);
+		$data[6] = chr(ord($data[6]) & 0x0F | 0x40);
 		// Set bits 6-7 to 10.
-		$data[8] = chr(ord($data[8]) & 0x3f | 0x80);
+		$data[8] = chr(ord($data[8]) & 0x3F | 0x80);
 
 		// Output the 36 character UUID.
 		return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
diff --git a/src/Messaging/MessageBuilder.php b/src/Messaging/MessageBuilder.php
index b2ced8b..1eb6622 100644
--- a/src/Messaging/MessageBuilder.php
+++ b/src/Messaging/MessageBuilder.php
@@ -68,7 +68,7 @@ public function buildControlMessage(
 			'body_encoding' => 'base64',
 			'delivery_mode' => 2,
 			'delivery_tag' => Functions::uuid4(),
-			'priority' => 0
+			'priority' => 0,
 		];
 
 		return new CeleryMessage($headers, $properties, $body, $this->serializer);
diff --git a/src/TaskMetaResult.php b/src/TaskMetaResult.php
index 6d9ac9a..b5da374 100644
--- a/src/TaskMetaResult.php
+++ b/src/TaskMetaResult.php
@@ -74,8 +74,8 @@ public static function fromArray(
 		$missingFields = array_diff(self::EXPECTED_FIELDS, array_keys($data));
 		if ($missingFields) {
 			throw new InvalidArgumentException(sprintf(
-				"Unable to create TaskMetaResult from invalid data. " .
-				"Missing fields: " . implode(',', $missingFields)
+				"Unable to create TaskMetaResult from invalid data. "
+				. "Missing fields: " . implode(',', $missingFields),
 			));
 		}
 
diff --git a/src/TaskSignature.php b/src/TaskSignature.php
index 7f00195..6760f05 100644
--- a/src/TaskSignature.php
+++ b/src/TaskSignature.php
@@ -164,7 +164,7 @@ public function setRetries(?int $retries): self {
 
 	/**
 	 * Countdown is a shortcut to set ETA by seconds into the future.
-	 * See method TaskSignature::setEta()
+	 * See method TaskSignature::setEta().
 	 */
 	public function setCountdown(int $seconds): self {
 		$self = clone $this;
@@ -223,7 +223,8 @@ private function rawSetArgs(array $args): void {
 
 		if (!array_is_list($args)) {
 			throw new InvalidArgumentException(
-				"Args must be passed as an indexed array");
+				"Args must be passed as an indexed array",
+			);
 		}
 
 		$this->args = $args;
@@ -247,7 +248,7 @@ private function rawSetRetries(?int $retries): void {
 
 	/**
 	 * Countdown is a shortcut to set ETA by seconds into the future.
-	 * See method TaskSignature::setEta()
+	 * See method TaskSignature::setEta().
 	 */
 	private function rawSetCountdown(int $seconds): void {
 
@@ -292,7 +293,8 @@ protected static function ensureAtomDatetime($time): string {
 
 			if (!strtotime($time)) {
 				throw new InvalidArgumentException(sprintf(
-					"Cannot convert '%s' to datetime", $time
+					"Cannot convert '%s' to datetime",
+					$time,
 				));
 			}
 
@@ -305,7 +307,8 @@ protected static function ensureAtomDatetime($time): string {
 		}
 
 		throw new InvalidArgumentException(sprintf(
-			"Cannot convert '%s' to datetime", (string) $time,
+			"Cannot convert '%s' to datetime",
+			(string) $time,
 		));
 
 	}
diff --git a/tests/suite/AsyncResult.phpt b/tests/suite/AsyncResult.phpt
index 4955dc1..66aa2ff 100644
--- a/tests/suite/AsyncResult.phpt
+++ b/tests/suite/AsyncResult.phpt
@@ -29,7 +29,7 @@ class TempBackend implements IResultBackend {
 
 		return TaskMetaResult::fromArray(
 			$taskId,
-			$this->storage[$taskId] ?? []
+			$this->storage[$taskId] ?? [],
 		);
 
 	}
@@ -38,7 +38,7 @@ class TempBackend implements IResultBackend {
 		string $taskId,
 		$result,
 		string $state,
-		?string $traceback = null
+		?string $traceback = null,
 	): void {
 
 		self::$callCounter[__METHOD__]++;
@@ -63,7 +63,7 @@ class TempBackend implements IResultBackend {
 
 }
 
-$backend = new TempBackend;
+$backend = new TempBackend();
 
 //
 // Test getting a result from non-existing task ID.
@@ -91,7 +91,7 @@ const TASK_RESULT = 'whatever result 🌭';
 $backend->storeResult(
 	TASK_ID,
 	TASK_RESULT,
-	TASK_STATE
+	TASK_STATE,
 );
 
 //
@@ -137,7 +137,7 @@ Assert::noError(function() use ($result) {
 
 Assert::true(
 	$backend::$callCounter['TempBackend::getTaskMetaResult'] > $called,
-	'Unserialized AsyncResult with a non-ready state still fetches task meta info.'
+	'Unserialized AsyncResult with a non-ready state still fetches task meta info.',
 );
 
 // AsyncResult must not have an empty task ID.
diff --git a/tests/suite/Control.Revoke.phpt b/tests/suite/Control.Revoke.phpt
index 5ccda7d..4d4015f 100644
--- a/tests/suite/Control.Revoke.phpt
+++ b/tests/suite/Control.Revoke.phpt
@@ -13,7 +13,7 @@ use Smuuf\CeleryForPhp\Interfaces\IResultBackend;
 
 require __DIR__ . '/../bootstrap.php';
 
-$fakeBroker = new class implements IBroker {
+$fakeBroker = new class() implements IBroker {
 
 	private $last = [];
 
@@ -33,7 +33,7 @@ $fakeBroker = new class implements IBroker {
 
 };
 
-$fakeResultBackend = new class implements IResultBackend {
+$fakeResultBackend = new class() implements IResultBackend {
 
 	public function getTaskMetaResult(string $taskId): TaskMetaResult {
 		return new TaskMetaResult('meh');
diff --git a/tests/suite/Integration/RealTask.task.justWait.revoke.phpt b/tests/suite/Integration/RealTask.task.justWait.revoke.phpt
index 666cfdd..7496f14 100644
--- a/tests/suite/Integration/RealTask.task.justWait.revoke.phpt
+++ b/tests/suite/Integration/RealTask.task.justWait.revoke.phpt
@@ -56,7 +56,7 @@ Assert::same(State::PENDING, $asyncResult->getState(), "A running task is PENDIN
 // Wait for result.
 $result = $asyncResult->get();
 Assert::same(State::SUCCESS, $asyncResult->getState(), "State is a SUCCESS");
-	Assert::same('YAY', $result, "Even revoked (without termination) task finished with a result");
+Assert::same('YAY', $result, "Even revoked (without termination) task finished with a result");
 
 //
 // Just revoke. (with track_started=True)
@@ -75,7 +75,7 @@ Assert::same(State::STARTED, $asyncResult->getState(), "A running task is STARTE
 // Wait for result.
 $result = $asyncResult->get();
 Assert::same(State::SUCCESS, $asyncResult->getState(), "State is a SUCCESS");
-	Assert::same('YAY_tracked_start', $result, "Even revoked (without termination) task finished with a result");
+Assert::same('YAY_tracked_start', $result, "Even revoked (without termination) task finished with a result");
 
 //
 // Revoke + terminate (without track_started=True)
diff --git a/tests/suite/Messaging.MessageBuilder.phpt b/tests/suite/Messaging.MessageBuilder.phpt
index db3b162..edbd1c9 100644
--- a/tests/suite/Messaging.MessageBuilder.phpt
+++ b/tests/suite/Messaging.MessageBuilder.phpt
@@ -16,7 +16,7 @@ $sig = (new TaskSignature('celery_for_php.tasks.tests.some_task_name'))
 	->setQueue('some_very_queue')
 	->setCountdown(120)
 	->setExpiration('+2 hours')
-	->setArgs([1,2,3])
+	->setArgs([1, 2, 3])
 	->setKwargs(['arg_1' => 'hello', 'arg_2' => 'there'])
 	->setRetries(10)
 	->setTimeLimit(null, 3600);
@@ -36,4 +36,3 @@ Assert::exception(
 	InvalidArgumentException::class,
 	'Cannot format task message as unknown version 99987654',
 );
-
diff --git a/tests/suite/Producer.phpt b/tests/suite/Producer.phpt
index 1aead14..e39bf00 100644
--- a/tests/suite/Producer.phpt
+++ b/tests/suite/Producer.phpt
@@ -13,7 +13,7 @@ use Smuuf\CeleryForPhp\TaskSignature;
 
 require __DIR__ . '/../bootstrap.php';
 
-$fakeBroker = new class implements IBroker {
+$fakeBroker = new class() implements IBroker {
 
 	private $last = [];
 
diff --git a/tests/suite/StrictObject.phpt b/tests/suite/StrictObject.phpt
index fc142d1..00dedcd 100644
--- a/tests/suite/StrictObject.phpt
+++ b/tests/suite/StrictObject.phpt
@@ -5,7 +5,7 @@ use Tester\Assert;
 
 require __DIR__ . '/../bootstrap.php';
 
-$o = new class {
+$o = new class() {
 
 	use StrictObject;
 
diff --git a/tests/suite/TaskMetaResult.phpt b/tests/suite/TaskMetaResult.phpt
index 850b6e6..a110007 100644
--- a/tests/suite/TaskMetaResult.phpt
+++ b/tests/suite/TaskMetaResult.phpt
@@ -4,7 +4,7 @@ use Smuuf\CeleryForPhp\Exc\InvalidArgumentException;
 use Tester\Assert;
 
 use Smuuf\CeleryForPhp\State;
-use Smuuf\CeleryForPhp\TaskMetaResult as TaskMetaResult;
+use Smuuf\CeleryForPhp\TaskMetaResult;
 
 require __DIR__ . '/../bootstrap.php';
 
@@ -33,7 +33,7 @@ foreach ($empties as $tm) {
 $tm = new TaskMetaResult(
 	TASK_ID,
 	State::STARTED,
-	['pid' => 123456, 'hostname' => 'some_machine']
+	['pid' => 123456, 'hostname' => 'some_machine'],
 );
 Assert::same(TASK_ID, $tm->getTaskId());
 Assert::same(State::STARTED, $tm->getState());