diff --git a/lib/Internal/Placeholder.php b/lib/Internal/Placeholder.php
index 5e352d5..7e26081 100644
--- a/lib/Internal/Placeholder.php
+++ b/lib/Internal/Placeholder.php
@@ -58,10 +58,8 @@ final class Placeholder
     {
         try {
             $this->result = null;
-        } catch (\Throwable $e) {
-            Loop::defer(static function () use ($e): void {
-                throw $e;
-            });
+        } catch (\Throwable $exception) {
+            Loop::defer(static fn() => throw $exception);
         }
     }
 
diff --git a/lib/Internal/ResolutionQueue.php b/lib/Internal/ResolutionQueue.php
index 0895977..f642097 100644
--- a/lib/Internal/ResolutionQueue.php
+++ b/lib/Internal/ResolutionQueue.php
@@ -71,9 +71,7 @@ final class ResolutionQueue
                     Promise\rethrow($result);
                 }
             } catch (\Throwable $exception) {
-                Loop::defer(static function () use ($exception): void {
-                    throw $exception;
-                });
+                Loop::defer(static fn() => throw $exception);
             }
         }
     }
diff --git a/test/DeferTest.php b/test/DeferTest.php
index e329c4f..c505ae7 100644
--- a/test/DeferTest.php
+++ b/test/DeferTest.php
@@ -18,11 +18,9 @@ class DeferTest extends AsyncTestCase
 
         $exception = new TestException;
 
-        defer(function () use ($exception): void {
-            throw $exception;
-        });
+        defer(fn() => throw $exception);
 
-        delay(1); // Tick event loop.
+        delay(5); // Tick event loop.
 
         $this->assertSame($exception, $reason);
     }