diff --git a/src/Process/ParallelProcess.php b/src/Process/ParallelProcess.php
index b36040a..c27155c 100644
--- a/src/Process/ParallelProcess.php
+++ b/src/Process/ParallelProcess.php
@@ -68,15 +68,15 @@ public function getOutput()
         if (! $this->output) {
             $processOutput = $this->process->getOutput();
 
-			$childResult = @unserialize(base64_decode($processOutput));
+            $childResult = @unserialize(base64_decode($processOutput));
 
             if ($childResult === false || ! array_key_exists('output', $childResult)) {
                 $this->errorOutput = $processOutput;
 
-				return null;
+                return null;
             }
 
-			$this->output = $childResult['output'];
+            $this->output = $childResult['output'];
         }
 
         return $this->output;
@@ -87,13 +87,13 @@ public function getErrorOutput()
         if (! $this->errorOutput) {
             $processOutput = $this->process->getErrorOutput();
 
-			$childResult = @unserialize(base64_decode($processOutput));
+            $childResult = @unserialize(base64_decode($processOutput));
 
             if ($childResult === false || ! array_key_exists('output', $childResult)) {
                 $this->errorOutput = $processOutput;
-			} else {
-				$this->errorOutput = $childResult['output'];
-			}
+            } else {
+                $this->errorOutput = $childResult['output'];
+            }
         }
 
         return $this->errorOutput;
diff --git a/src/Runtime/ChildRuntime.php b/src/Runtime/ChildRuntime.php
index 47f4c46..e0cbc4a 100644
--- a/src/Runtime/ChildRuntime.php
+++ b/src/Runtime/ChildRuntime.php
@@ -4,7 +4,7 @@
 
 // php://stdout does not obey output buffering. Any output would break
 // unserialization of child process results in the parent process.
-if (!defined('STDOUT')) {
+if (! defined('STDOUT')) {
     define('STDOUT', fopen('php://temp', 'w+b'));
     define('STDERR', fopen('php://stderr', 'wb'));
 }
diff --git a/tests/ChildRuntimeTest.php b/tests/ChildRuntimeTest.php
index f63fe70..2e761e1 100644
--- a/tests/ChildRuntimeTest.php
+++ b/tests/ChildRuntimeTest.php
@@ -16,6 +16,7 @@ public function it_can_run()
 
         $serializedClosure = base64_encode(serialize(new SerializableClosure(function () {
             echo 'interfere with output';
+
             return 'child';
         })));