diff --git a/src/Illuminate/Support/Sleep.php b/src/Illuminate/Support/Sleep.php
index 041535b9b42f..101ed3b36f50 100644
--- a/src/Illuminate/Support/Sleep.php
+++ b/src/Illuminate/Support/Sleep.php
@@ -5,11 +5,14 @@
 use Carbon\Carbon;
 use Carbon\CarbonInterval;
 use DateInterval;
+use Illuminate\Support\Traits\Macroable;
 use PHPUnit\Framework\Assert as PHPUnit;
 use RuntimeException;
 
 class Sleep
 {
+    use Macroable;
+
     /**
      * The total duration to sleep.
      *
@@ -53,19 +56,7 @@ class Sleep
      */
     public function __construct($duration)
     {
-        if (! $duration instanceof DateInterval) {
-            $this->duration = CarbonInterval::microsecond(0);
-
-            $this->pending = $duration;
-        } else {
-            $duration = CarbonInterval::instance($duration);
-
-            if ($duration->totalMicroseconds < 0) {
-                $duration = CarbonInterval::seconds(0);
-            }
-
-            $this->duration = $duration;
-        }
+        $this->duration($duration);
     }
 
     /**
@@ -116,6 +107,32 @@ public static function sleep($duration)
         return (new static($duration))->seconds();
     }
 
+    /**
+     * Sleep for the given duration. Replaces any previously defined duration.
+     *
+     * @param  \DateInterval|int|float  $duration
+     * @return $this
+     */
+    protected function duration($duration)
+    {
+        if (! $duration instanceof DateInterval) {
+            $this->duration = CarbonInterval::microsecond(0);
+
+            $this->pending = $duration;
+        } else {
+            $duration = CarbonInterval::instance($duration);
+
+            if ($duration->totalMicroseconds < 0) {
+                $duration = CarbonInterval::seconds(0);
+            }
+
+            $this->duration = $duration;
+            $this->pending = null;
+        }
+
+        return $this;
+    }
+
     /**
      * Sleep for the given number of minutes.
      *
diff --git a/tests/Support/SleepTest.php b/tests/Support/SleepTest.php
index 13c7ed4d9d3b..af73291014f1 100644
--- a/tests/Support/SleepTest.php
+++ b/tests/Support/SleepTest.php
@@ -414,4 +414,53 @@ public function testAssertSlept()
             $this->assertSame("The expected sleep was found [0] times instead of [1].\nFailed asserting that 0 is identical to 1.", $e->getMessage());
         }
     }
+
+    public function testItCanCreateMacrosViaMacroable()
+    {
+        Sleep::fake();
+
+        Sleep::macro('forSomeConfiguredAmountOfTime', static function () {
+            return Sleep::for(3)->seconds();
+        });
+
+        Sleep::macro('useSomeOtherAmountOfTime', function () {
+            /** @var Sleep $this */
+            return $this->duration(1.234)->seconds();
+        });
+
+        Sleep::macro('andSomeMoreGranularControl', function () {
+            /** @var Sleep $this */
+            return $this->and(567)->microseconds();
+        });
+
+        // A static macro can be referenced
+        $sleep = Sleep::forSomeConfiguredAmountOfTime();
+        $this->assertSame($sleep->duration->totalMicroseconds, 3000000);
+
+        // A macro can specify a new duration
+        $sleep = $sleep->useSomeOtherAmountOfTime();
+        $this->assertSame($sleep->duration->totalMicroseconds, 1234000);
+
+        // A macro can supplement an existing duration
+        $sleep = $sleep->andSomeMoreGranularControl();
+        $this->assertSame($sleep->duration->totalMicroseconds, 1234567);
+    }
+
+    public function testItCanReplacePreviouslyDefinedDurations()
+    {
+        Sleep::fake();
+
+        Sleep::macro('setDuration', function ($duration) {
+            return $this->duration($duration);
+        });
+
+        $sleep = Sleep::for(1)->second();
+        $this->assertSame($sleep->duration->totalMicroseconds, 1000000);
+
+        $sleep->setDuration(2)->second();
+        $this->assertSame($sleep->duration->totalMicroseconds, 2000000);
+
+        $sleep->setDuration(500)->milliseconds();
+        $this->assertSame($sleep->duration->totalMicroseconds, 500000);
+    }
 }