diff --git a/Imagine/Filter/PostProcessor/JpegOptimPostProcessor.php b/Imagine/Filter/PostProcessor/JpegOptimPostProcessor.php
index a5190900a..7b001f618 100644
--- a/Imagine/Filter/PostProcessor/JpegOptimPostProcessor.php
+++ b/Imagine/Filter/PostProcessor/JpegOptimPostProcessor.php
@@ -15,7 +15,7 @@
 use Liip\ImagineBundle\Binary\FileBinaryInterface;
 use Liip\ImagineBundle\Model\Binary;
 use Symfony\Component\Process\Exception\ProcessFailedException;
-use Symfony\Component\Process\ProcessBuilder;
+use Symfony\Component\Process\Process;
 
 class JpegOptimPostProcessor implements PostProcessorInterface, ConfigurablePostProcessorInterface
 {
@@ -141,33 +141,33 @@ public function processWithConfiguration(BinaryInterface $binary, array $options
             throw new \RuntimeException(sprintf('Temp file can not be created in "%s".', $tempDir));
         }
 
-        $pb = new ProcessBuilder([$this->jpegoptimBin]);
+        $processArguments = [$this->jpegoptimBin];
 
         $stripAll = array_key_exists('strip_all', $options) ? $options['strip_all'] : $this->stripAll;
         if ($stripAll) {
-            $pb->add('--strip-all');
+            $processArguments[] =  '--strip-all';
         }
 
         $max = array_key_exists('max', $options) ? $options['max'] : $this->max;
         if ($max) {
-            $pb->add('--max='.$max);
+            $processArguments[] =  '--max='.$max;
         }
 
         $progressive = array_key_exists('progressive', $options) ? $options['progressive'] : $this->progressive;
         if ($progressive) {
-            $pb->add('--all-progressive');
+            $processArguments[] =  '--all-progressive';
         } else {
-            $pb->add('--all-normal');
+            $processArguments[] =  '--all-normal';
         }
 
-        $pb->add($input);
+        $processArguments[] = $input;
         if ($binary instanceof FileBinaryInterface) {
             copy($binary->getPath(), $input);
         } else {
             file_put_contents($input, $binary->getContent());
         }
 
-        $proc = $pb->getProcess();
+        $proc = new Process($processArguments);
         $proc->run();
 
         if (false !== strpos($proc->getOutput(), 'ERROR') || 0 !== $proc->getExitCode()) {
diff --git a/Imagine/Filter/PostProcessor/MozJpegPostProcessor.php b/Imagine/Filter/PostProcessor/MozJpegPostProcessor.php
index 384cbab44..ff08321b7 100644
--- a/Imagine/Filter/PostProcessor/MozJpegPostProcessor.php
+++ b/Imagine/Filter/PostProcessor/MozJpegPostProcessor.php
@@ -14,7 +14,7 @@
 use Liip\ImagineBundle\Binary\BinaryInterface;
 use Liip\ImagineBundle\Model\Binary;
 use Symfony\Component\Process\Exception\ProcessFailedException;
-use Symfony\Component\Process\ProcessBuilder;
+use Symfony\Component\Process\Process;
 
 /**
  * mozjpeg post-processor, for noticably better jpeg compression.
@@ -85,24 +85,23 @@ public function processWithConfiguration(BinaryInterface $binary, array $options
             return $binary;
         }
 
-        $pb = new ProcessBuilder([$this->mozjpegBin]);
+        $processArguments = [$this->mozjpegBin];
 
         // Places emphasis on DC
-        $pb->add('-quant-table');
-        $pb->add(2);
+        $processArguments[] =  '-quant-table';
+        $processArguments[] =  2;
 
         $transformQuality = array_key_exists('quality', $options) ? $options['quality'] : $this->quality;
         if ($transformQuality !== null) {
-            $pb->add('-quality');
-            $pb->add($transformQuality);
+            $processArguments[] =  '-quality';
+            $processArguments[] =  $transformQuality;
         }
 
-        $pb->add('-optimise');
+        $processArguments[] =  '-optimise';
 
         // Favor stdin/stdout so we don't waste time creating a new file.
-        $pb->setInput($binary->getContent());
-
-        $proc = $pb->getProcess();
+        $proc = new Process($processArguments);
+        $proc->setInput($binary->getContent());
         $proc->run();
 
         if (false !== strpos($proc->getOutput(), 'ERROR') || 0 !== $proc->getExitCode()) {
diff --git a/Imagine/Filter/PostProcessor/OptiPngPostProcessor.php b/Imagine/Filter/PostProcessor/OptiPngPostProcessor.php
index 6a810dce9..07fd01f40 100644
--- a/Imagine/Filter/PostProcessor/OptiPngPostProcessor.php
+++ b/Imagine/Filter/PostProcessor/OptiPngPostProcessor.php
@@ -15,7 +15,7 @@
 use Liip\ImagineBundle\Binary\FileBinaryInterface;
 use Liip\ImagineBundle\Model\Binary;
 use Symfony\Component\Process\Exception\ProcessFailedException;
-use Symfony\Component\Process\ProcessBuilder;
+use Symfony\Component\Process\Process;
 
 class OptiPngPostProcessor implements PostProcessorInterface, ConfigurablePostProcessorInterface
 {
@@ -93,19 +93,19 @@ public function processWithConfiguration(BinaryInterface $binary, array $options
             throw new \RuntimeException(sprintf('Temp file can not be created in "%s".', $tempDir));
         }
 
-        $pb = new ProcessBuilder([$this->optipngBin]);
+        $processArguments = [$this->optipngBin];
 
         $level = array_key_exists('level', $options) ? $options['level'] : $this->level;
         if ($level !== null) {
-            $pb->add(sprintf('--o%d', $level));
+            $processArguments[] =  sprintf('--o%d', $level);
         }
 
         $stripAll = array_key_exists('strip_all', $options) ? $options['strip_all'] : $this->stripAll;
         if ($stripAll) {
-            $pb->add('--strip=all');
+            $processArguments[] =  '--strip=all';
         }
 
-        $pb->add($input);
+        $processArguments[] =  $input;
 
         if ($binary instanceof FileBinaryInterface) {
             copy($binary->getPath(), $input);
@@ -113,7 +113,7 @@ public function processWithConfiguration(BinaryInterface $binary, array $options
             file_put_contents($input, $binary->getContent());
         }
 
-        $proc = $pb->getProcess();
+        $proc = new Process($processArguments);
         $proc->run();
 
         if (false !== strpos($proc->getOutput(), 'ERROR') || 0 !== $proc->getExitCode()) {
diff --git a/Imagine/Filter/PostProcessor/PngquantPostProcessor.php b/Imagine/Filter/PostProcessor/PngquantPostProcessor.php
index 9dcd3f302..5c696e223 100644
--- a/Imagine/Filter/PostProcessor/PngquantPostProcessor.php
+++ b/Imagine/Filter/PostProcessor/PngquantPostProcessor.php
@@ -14,7 +14,7 @@
 use Liip\ImagineBundle\Binary\BinaryInterface;
 use Liip\ImagineBundle\Model\Binary;
 use Symfony\Component\Process\Exception\ProcessFailedException;
-use Symfony\Component\Process\ProcessBuilder;
+use Symfony\Component\Process\Process;
 
 /**
  * pngquant post-processor, for optimal, web-safe, lossy png compression
@@ -83,18 +83,17 @@ public function processWithConfiguration(BinaryInterface $binary, array $options
             return $binary;
         }
 
-        $pb = new ProcessBuilder([$this->pngquantBin]);
+        $processArguments = [$this->pngquantBin];
 
         // Specify quality.
         $tranformQuality = array_key_exists('quality', $options) ? $options['quality'] : $this->quality;
-        $pb->add('--quality');
-        $pb->add($tranformQuality);
+        $processArguments[] =  '--quality';
+        $processArguments[] =  $tranformQuality;
 
         // Read to/from stdout to save resources.
-        $pb->add('-');
-        $pb->setInput($binary->getContent());
-
-        $proc = $pb->getProcess();
+        $processArguments[] =  '-';
+        $proc = new Process($processArguments);
+        $proc->setInput($binary->getContent());
         $proc->run();
 
         // 98 and 99 are "quality too low" to compress current current image which, while isn't ideal, is not a failure
diff --git a/Tests/Fixtures/bash/empty-command.sh b/Tests/Fixtures/bash/empty-command.sh
new file mode 100755
index 000000000..96b4b06ad
--- /dev/null
+++ b/Tests/Fixtures/bash/empty-command.sh
@@ -0,0 +1 @@
+#!/bin/sh
\ No newline at end of file
diff --git a/Tests/Imagine/Filter/PostProcessor/JpegOptimPostProcessorTest.php b/Tests/Imagine/Filter/PostProcessor/JpegOptimPostProcessorTest.php
new file mode 100644
index 000000000..2ec22788b
--- /dev/null
+++ b/Tests/Imagine/Filter/PostProcessor/JpegOptimPostProcessorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Liip\ImagineBundle\Tests\Imagine\Filter\PostProcessor;
+
+use Liip\ImagineBundle\Binary\BinaryInterface;
+use Liip\ImagineBundle\Imagine\Filter\PostProcessor\JpegOptimPostProcessor;
+use Liip\ImagineBundle\Model\Binary;
+use Liip\ImagineBundle\Tests\AbstractTest;
+
+class JpegOptimPostProcessorTest extends AbstractTest
+{
+    public function testJpegOptimPostProcessor()
+    {
+        $jpegOptimPostProcessor = new JpegOptimPostProcessor(
+            __DIR__.'/../../../Fixtures/bash/empty-command.sh'
+        );
+
+        $binary = new Binary('content', 'image/jpg', 'jpg');
+        $result = $jpegOptimPostProcessor->process($binary);
+
+        $this->assertInstanceOf(BinaryInterface::class, $result);
+    }
+}
diff --git a/Tests/Imagine/Filter/PostProcessor/MozJpegPostProcessorTest.php b/Tests/Imagine/Filter/PostProcessor/MozJpegPostProcessorTest.php
new file mode 100644
index 000000000..0df266539
--- /dev/null
+++ b/Tests/Imagine/Filter/PostProcessor/MozJpegPostProcessorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Liip\ImagineBundle\Tests\Imagine\Filter\PostProcessor;
+
+use Liip\ImagineBundle\Binary\BinaryInterface;
+use Liip\ImagineBundle\Imagine\Filter\PostProcessor\MozJpegPostProcessor;
+use Liip\ImagineBundle\Model\Binary;
+use Liip\ImagineBundle\Tests\AbstractTest;
+
+class MozJpegPostProcessorTest extends AbstractTest
+{
+    public function testMozJpegPostProcessor()
+    {
+        $mozJpegPostProcessor = new MozJpegPostProcessor(
+            __DIR__.'/../../../Fixtures/bash/empty-command.sh'
+        );
+
+        $binary = new Binary('content', 'image/jpg', 'jpg');
+        $result = $mozJpegPostProcessor->process($binary);
+
+        $this->assertInstanceOf(BinaryInterface::class, $result);
+    }
+}
diff --git a/Tests/Imagine/Filter/PostProcessor/OptiPngPostProcessorTest.php b/Tests/Imagine/Filter/PostProcessor/OptiPngPostProcessorTest.php
new file mode 100644
index 000000000..7e72965c4
--- /dev/null
+++ b/Tests/Imagine/Filter/PostProcessor/OptiPngPostProcessorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Liip\ImagineBundle\Tests\Imagine\Filter\PostProcessor;
+
+use Liip\ImagineBundle\Binary\BinaryInterface;
+use Liip\ImagineBundle\Imagine\Filter\PostProcessor\OptiPngPostProcessor;
+use Liip\ImagineBundle\Model\Binary;
+use Liip\ImagineBundle\Tests\AbstractTest;
+
+class OptiPngPostProcessorTest extends AbstractTest
+{
+    public function testJpegOptimPostProcessor()
+    {
+        $optiPngPostProcessor = new OptiPngPostProcessor(
+            __DIR__.'/../../../Fixtures/bash/empty-command.sh'
+        );
+
+        $binary = new Binary('content', 'image/png', 'png');
+        $result = $optiPngPostProcessor->process($binary);
+
+        $this->assertInstanceOf(BinaryInterface::class, $result);
+    }
+}
diff --git a/Tests/Imagine/Filter/PostProcessor/PngquantPostProcessorTest.php b/Tests/Imagine/Filter/PostProcessor/PngquantPostProcessorTest.php
new file mode 100644
index 000000000..3d43ab115
--- /dev/null
+++ b/Tests/Imagine/Filter/PostProcessor/PngquantPostProcessorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Liip\ImagineBundle\Tests\Imagine\Filter\PostProcessor;
+
+use Liip\ImagineBundle\Binary\BinaryInterface;
+use Liip\ImagineBundle\Imagine\Filter\PostProcessor\PngquantPostProcessor;
+use Liip\ImagineBundle\Model\Binary;
+use Liip\ImagineBundle\Tests\AbstractTest;
+
+class PngquantPostProcessorTest extends AbstractTest
+{
+    public function testPngquantPostProcessor()
+    {
+        $pngquantPostProcessor = new PngquantPostProcessor(
+            __DIR__.'/../../../Fixtures/bash/empty-command.sh'
+        );
+
+        $binary = new Binary('content', 'image/png', 'png');
+        $result = $pngquantPostProcessor->process($binary);
+
+        $this->assertInstanceOf(BinaryInterface::class, $result);
+    }
+}