diff --git a/.gitignore b/.gitignore
index 3bf6283..d2f34cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ vendor
 .php_cs.cache
 coverage
 .phpunit*
+*.cache
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..0413484
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,21 @@
+<?php
+
+$config = new class extends Amp\CodeStyle\Config {
+    public function getRules(): array
+    {
+        return array_merge(parent::getRules(), [
+            'void_return' => true,
+        ]);
+    }
+};
+
+$config->getFinder()
+    ->in(__DIR__ . '/lib')
+    ->in(__DIR__ . '/test')
+    ->in(__DIR__ . '/examples');
+
+$cacheDir = getenv('TRAVIS') ? getenv('HOME') . '/.php-cs-fixer' : __DIR__;
+
+$config->setCacheFile($cacheDir . '/.php_cs.cache');
+
+return $config;
diff --git a/.php_cs.dist b/.php_cs.dist
deleted file mode 100644
index 8d02bce..0000000
--- a/.php_cs.dist
+++ /dev/null
@@ -1,13 +0,0 @@
-<?php
-
-$config = new Amp\CodeStyle\Config();
-$config->getFinder()
-    ->in(__DIR__ . '/examples')
-    ->in(__DIR__ . '/lib')
-    ->in(__DIR__ . '/test');
-
-$cacheDir = getenv('TRAVIS') ? getenv('HOME') . '/.php-cs-fixer' : __DIR__;
-
-$config->setCacheFile($cacheDir . '/.php_cs.cache');
-
-return $config;
diff --git a/examples/1. Basic/GenericLoop.php b/examples/1. Basic/GenericLoop.php
index a41ba0f..e79d04f 100644
--- a/examples/1. Basic/GenericLoop.php	
+++ b/examples/1. Basic/GenericLoop.php	
@@ -17,15 +17,15 @@ for ($x = 0; $x < 10; $x++) {
     };
     $loop = new GenericLoop($callable, "Loop number $x");
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
-delay(5000);
+delay(5);
 echo "Resuming prematurely all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->resume();
 }
 echo "OK done, waiting 5 more seconds!".PHP_EOL;
-delay(5000);
+delay(5);
 echo "Closing all loops!".PHP_EOL;
-delay(10);
+delay(0.01);
diff --git a/examples/1. Basic/PeriodicLoop.php b/examples/1. Basic/PeriodicLoop.php
index 946ffb1..b1a8cea 100644
--- a/examples/1. Basic/PeriodicLoop.php	
+++ b/examples/1. Basic/PeriodicLoop.php	
@@ -17,15 +17,15 @@ for ($x = 0; $x < 10; $x++) {
     };
     $loop = new PeriodicLoop($callable, "Loop number $x", 1000);
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
-delay(5000);
+delay(5);
 echo "Resuming prematurely all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->resume();
 }
 echo "OK done, waiting 5 more seconds!".PHP_EOL;
-delay(5000);
+delay(5);
 echo "Closing all loops!".PHP_EOL;
-delay(10);
+delay(0.01);
diff --git a/examples/2. Advanced/Loop.php b/examples/2. Advanced/Loop.php
index d518ac5..80ed892 100644
--- a/examples/2. Advanced/Loop.php	
+++ b/examples/2. Advanced/Loop.php	
@@ -77,13 +77,13 @@ class MyLoop extends Loop
 }
 
 $function = function (int $number) {
-    delay(1000);
+    delay(1);
     return $number + 1;
 };
 $loops = [];
 for ($x = 0; $x < 10; $x++) {
     $loop = new MyLoop($function, "Loop number $x");
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
diff --git a/examples/2. Advanced/ResumableLoop.php b/examples/2. Advanced/ResumableLoop.php
index dbaccc8..cd053d4 100644
--- a/examples/2. Advanced/ResumableLoop.php	
+++ b/examples/2. Advanced/ResumableLoop.php	
@@ -71,10 +71,10 @@ $loops = [];
 for ($x = 0; $x < 10; $x++) {
     $loop = new MyLoop("Loop number $x");
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
-delay(5000);
+delay(5);
 echo "Resuming prematurely all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->resume();
diff --git a/examples/2. Advanced/ResumableSignalLoop.php b/examples/2. Advanced/ResumableSignalLoop.php
index 5ba32b9..5b6d455 100644
--- a/examples/2. Advanced/ResumableSignalLoop.php	
+++ b/examples/2. Advanced/ResumableSignalLoop.php	
@@ -54,16 +54,16 @@ $loops = [];
 for ($x = 0; $x < 10; $x++) {
     $loop = new ResSigLoop("Loop number $x");
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
-delay(5000);
+delay(5);
 echo "Resuming prematurely all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->resume();
 }
 echo "OK done, waiting 5 more seconds!".PHP_EOL;
-delay(5000);
+delay(5);
 echo "Closing all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->signal(true);
diff --git a/examples/2. Advanced/SignalLoop.php b/examples/2. Advanced/SignalLoop.php
index 32aae37..1d43281 100644
--- a/examples/2. Advanced/SignalLoop.php	
+++ b/examples/2. Advanced/SignalLoop.php	
@@ -5,6 +5,7 @@ require 'vendor/autoload.php';
 use Amp\Loop;
 use danog\Loop\SignalLoop;
 
+use function Amp\async;
 use function Amp\delay;
 
 class SigLoop extends SignalLoop
@@ -31,7 +32,7 @@ class SigLoop extends SignalLoop
     {
         $number = 0;
         while (true) {
-            if ($this->waitSignal(delay(1000))) {
+            if ($this->waitSignal(async(delay(...), 1))) {
                 echo "Got exit signal in $this!".PHP_EOL;
                 return;
             }
@@ -53,10 +54,10 @@ $loops = [];
 for ($x = 0; $x < 10; $x++) {
     $loop = new SigLoop("Loop number $x");
     $loop->start();
-    delay(100);
+    delay(0.1);
     $loops []= $loop;
 }
-delay(5000);
+delay(5);
 echo "Closing all loops!".PHP_EOL;
 foreach ($loops as $loop) {
     $loop->signal(true);
diff --git a/lib/Generic/GenericLoop.php b/lib/Generic/GenericLoop.php
index 8570347..4075d52 100644
--- a/lib/Generic/GenericLoop.php
+++ b/lib/Generic/GenericLoop.php
@@ -51,9 +51,7 @@ class GenericLoop extends ResumableSignalLoop
     /**
      * Callable.
      *
-     * @var callable
-     *
-     * @psalm-var callable():TCallableReturn
+     * @var callable():TCallableReturn
      */
     protected $callable;
     /**
@@ -91,7 +89,7 @@ class GenericLoop extends ResumableSignalLoop
             } elseif ($timeout > 0) {
                 $this->reportPause($timeout);
             }
-            if ($timeout === self::STOP || $this->waitSignal(async(fn () => $this->pause($timeout)))) {
+            if ($timeout === self::STOP || $this->waitSignal(async($this->pause(...), $timeout))) {
                 break;
             }
         }
diff --git a/lib/Generic/PeriodicLoop.php b/lib/Generic/PeriodicLoop.php
index 2697ad5..f170e47 100644
--- a/lib/Generic/PeriodicLoop.php
+++ b/lib/Generic/PeriodicLoop.php
@@ -34,30 +34,17 @@ class PeriodicLoop extends ResumableSignalLoop
      * @psalm-var callable():(bool|Future<bool>)
      */
     private $callback;
-    /**
-     * Loop name.
-     *
-     * @var string
-     */
-    private $name;
-    /**
-     * Loop interval.
-     *
-     * @var ?int
-     */
-    private $interval;
     /**
      * Constructor.
      *
      * If possible, the callable will be bound to the current instance of the loop.
      *
-     * @param callable $callback Callback to call
+     * @param callable():(bool|Future<bool>) $callback Callable to run
      * @param string   $name     Loop name
      * @param ?int     $interval Loop interval
      *
-     * @psalm-param callable():(bool|Future<bool>) $callback Callable to run
      */
-    public function __construct(callable $callback, string $name, ?int $interval)
+    public function __construct(callable $callback, private string $name, private ?int $interval)
     {
         if ($callback instanceof \Closure) {
             try {
@@ -72,7 +59,6 @@ class PeriodicLoop extends ResumableSignalLoop
     }
     /**
      * Loop implementation.
-     *
      */
     public function loop(): void
     {
@@ -86,7 +72,7 @@ class PeriodicLoop extends ResumableSignalLoop
                 break;
             }
             /** @var ?bool */
-            $result = $this->waitSignal(async(fn () => $this->pause($this->interval)));
+            $result = $this->waitSignal(async($this->pause(...), $this->interval));
             if ($result === true) {
                 break;
             }
diff --git a/test/ResumableTest.php b/test/ResumableTest.php
index aea7bf6..8c0e856 100644
--- a/test/ResumableTest.php
+++ b/test/ResumableTest.php
@@ -36,9 +36,9 @@ class ResumableTest extends Fixtures
         $this->assertTrue($loop->start());
         $this->assertAfterStart($loop);
 
-        delay(10);
+        delay(0.010);
         $this->assertTrue(self::isResolved($paused));
-        delay(100);
+        delay(0.1);
 
         $this->assertFinal($loop);
     }
@@ -59,7 +59,7 @@ class ResumableTest extends Fixtures
         $this->assertPreStart($loop);
         $this->assertTrue($loop->start());
 
-        delay(1);
+        delay(0.001);
         $this->assertFalse(self::isResolved($paused)); // Did not pause
 
         // Invert the order as the afterTest assertions will begin the test anew
@@ -81,7 +81,7 @@ class ResumableTest extends Fixtures
     {
         $paused = $deferred ? $loop->resumeDefer() : $loop->resume(); // Will resolve on next pause
         if ($deferred) {
-            delay(1); // Avoid resuming after starting
+            delay(0.001); // Avoid resuming after starting
         }
         $loop->setInterval($interval);
 
@@ -89,17 +89,17 @@ class ResumableTest extends Fixtures
         $this->assertTrue($loop->start());
         $this->assertAfterStart($loop);
 
-        delay(1);
+        delay(0.001);
         $this->assertTrue(self::isResolved($paused)); // Did pause
 
         $paused = $deferred ? $loop->resumeDefer() : $loop->resume();
         if ($deferred) {
             $this->assertAfterStart($loop);
-            delay(1);
+            delay(0.001);
         }
         $this->assertFinal($loop);
 
-        delay(1);
+        delay(0.001);
         $this->assertFalse(self::isResolved($paused)); // Did not pause again
     }
 
@@ -116,24 +116,24 @@ class ResumableTest extends Fixtures
     {
         $paused1 = $loop->resumeDeferOnce(); // Will resolve on next pause
         $paused2 = $loop->resumeDeferOnce(); // Will resolve on next pause
-        delay(1); // Avoid resuming after starting
+        delay(0.001); // Avoid resuming after starting
         $loop->setInterval(10000);
 
         $this->assertPreStart($loop);
         $this->assertTrue($loop->start());
         $this->assertAfterStart($loop);
 
-        delay(1);
+        delay(0.001);
         $this->assertTrue(self::isResolved($paused1)); // Did pause
         $this->assertTrue(self::isResolved($paused2)); // Did pause
 
         $paused1 = $loop->resumeDeferOnce();
         $paused2 = $loop->resumeDeferOnce();
         $this->assertAfterStart($loop);
-        delay(1);
+        delay(0.001);
         $this->assertFinal($loop);
 
-        delay(1);
+        delay(0.001);
         $this->assertFalse(self::isResolved($paused1)); // Did not pause again
         $this->assertFalse(self::isResolved($paused2)); // Did not pause again
     }
diff --git a/test/Traits/Basic.php b/test/Traits/Basic.php
index 2e248aa..82357c5 100644
--- a/test/Traits/Basic.php
+++ b/test/Traits/Basic.php
@@ -48,7 +48,7 @@ trait Basic
     public function loop(): void
     {
         $this->inited = true;
-        delay(100);
+        delay(0.1);
         $this->ran = true;
     }
     /**
diff --git a/test/Traits/Signal.php b/test/Traits/Signal.php
index 6913edb..e562c44 100644
--- a/test/Traits/Signal.php
+++ b/test/Traits/Signal.php
@@ -49,7 +49,7 @@ trait Signal
      */
     private function testGenerator(int $interval): void
     {
-        delay($interval);
+        delay($interval/1000);
     }
     /**
      * Loop implementation.