diff --git a/.gitignore b/.gitignore
index f4686f8..85210f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /.idea/
 /vendor/
+/tests/phpunit.log
 /composer.lock
diff --git a/makefile b/makefile
index 897c411..b1e3726 100644
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
-.PHONY: demo demo-build demo-run
+.PHONY: demo demo-build demo-run tests
 
 demo:
 	composer install
@@ -11,3 +11,6 @@ demo-build:
 
 demo-run:
 	docker run --rm -p 8080:80 --name tracy-profiler-demo tracy-profiler-demo
+
+tests:
+	sudo docker run -v $$(pwd):/app --rm php:5.4-cli bash -c 'cd /app && php ./vendor/bin/phpunit'
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..771ed39
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,10 @@
+<phpunit bootstrap="./vendor/autoload.php">
+    <testsuites>
+        <testsuite>
+            <directory suffix="Test.php">./tests</directory>
+        </testsuite>
+    </testsuites>
+    <logging>
+        <log type="testdox-text" target="./tests/phpunit.log"/>
+    </logging>
+</phpunit>
diff --git a/src/Profiler/Profiler.php b/src/Profiler/Profiler.php
index c58e0e4..2c61a44 100644
--- a/src/Profiler/Profiler.php
+++ b/src/Profiler/Profiler.php
@@ -9,15 +9,22 @@ class Profiler extends AdvancedProfiler
 {
     private static $postProcessors;
 
-    public static function setPostProcessor(callable $postProcessor)
+    /**
+     * @inheritdoc
+     */
+    public static function setPostProcessor(callable $postProcessor, $postProcessorId = "default")
     {
-        $postProcessorId = func_get_arg(1);
         self::$postProcessors[$postProcessorId] = $postProcessor;
 
         $postProcessors = self::$postProcessors;
         parent::setPostProcessor(function (Profile $profile) use ($postProcessors) {
-            foreach ($postProcessors as $postProcessor) {
-                $profile = call_user_func($postProcessor, $profile);
+            foreach ($postProcessors as $key => $postProcessor) {
+                if ($key !== "default") {
+                    $profile = call_user_func($postProcessor, $profile);
+                }
+            }
+            if (isset($postProcessors["default"])) {
+                $profile = call_user_func($postProcessors["default"], $profile);
             }
             return $profile;
         });
diff --git a/tests/Profiler/ProfilerTest.php b/tests/Profiler/ProfilerTest.php
index 87d47ac..569bf1e 100644
--- a/tests/Profiler/ProfilerTest.php
+++ b/tests/Profiler/ProfilerTest.php
@@ -1,6 +1,39 @@
 <?php
 
-class ProfilerTest
+namespace Netpromotion\Profiler\Test;
+
+use Netpromotion\Profiler\Profiler;
+use PetrKnap\Php\Profiler\Profile;
+
+class ProfilerTest extends \PHPUnit_Framework_TestCase
 {
-    // TODO test multiple hooks support, check that postProcessor with id NULL is called at the end
+    public function testMultipleHooksWorks()
+    {
+        $order = [];
+        Profiler::setPostProcessor(function(Profile $profile) use (&$order) {
+            $order[] = 1;
+            return $profile;
+        });
+
+        Profiler::setPostProcessor(function(Profile $profile) use (&$order) {
+            $order[] = 2;
+            return $profile;
+        });
+
+        Profiler::setPostProcessor(function(Profile $profile) use (&$order) {
+            $order[] = 3;
+            return $profile;
+        }, "B");
+
+        Profiler::setPostProcessor(function(Profile $profile) use (&$order) {
+            $order[] = 4;
+            return $profile;
+        }, "A");
+
+        Profiler::enable();
+        Profiler::start();
+        Profiler::finish();
+
+        $this->assertEquals([3, 4, 2], $order);
+    }
 }