diff --git a/lib/php/test/JsonSerialize/JsonSerializeTest.php b/lib/php/test/JsonSerialize/JsonSerializeTest.php
index dfb34c3..8c64595 100644
--- a/lib/php/test/JsonSerialize/JsonSerializeTest.php
+++ b/lib/php/test/JsonSerialize/JsonSerializeTest.php
@@ -20,95 +20,98 @@
 
 namespace Test\Thrift\JsonSerialize;
 
+use PHPUnit\Framework\TestCase;
 use stdClass;
 use Thrift\ClassLoader\ThriftClassLoader;
 
-require_once __DIR__.'/../../../../vendor/autoload.php';
+require_once __DIR__ . '/../../../../vendor/autoload.php';
 
-$loader = new ThriftClassLoader();
-$loader->registerDefinition('ThriftTest', __DIR__ . '/../packages/phpjs');
-$loader->register();
-
-class JsonSerializeTest extends \PHPUnit_Framework_TestCase
+/**
+ * @runTestsInSeparateProcesses
+ */
+class JsonSerializeTest extends TestCase
 {
-  protected function setUp() {
-    if (version_compare(phpversion(), '5.4', '<')) {
-      $this->markTestSkipped('Requires PHP 5.4 or newer!');
+    protected function setUp()
+    {
+        if (version_compare(phpversion(), '5.4', '<')) {
+            $this->markTestSkipped('Requires PHP 5.4 or newer!');
+        }
+        $loader = new ThriftClassLoader();
+        $loader->registerDefinition('ThriftTest', __DIR__ . '/../packages/phpjs');
+        $loader->register();
     }
-  }
 
-  public function testEmptyStruct()
-  {
-    $empty = new \ThriftTest\EmptyStruct(array('non_existing_key' => 'bar'));
-    $this->assertEquals(new stdClass(), json_decode(json_encode($empty)));
-  }
+    public function testEmptyStruct()
+    {
+        $empty = new \ThriftTest\EmptyStruct(array('non_existing_key' => 'bar'));
+        $this->assertEquals(new stdClass(), json_decode(json_encode($empty)));
+    }
 
-  public function testStringsAndInts()
-  {
-    $input = array(
-      'string_thing' => 'foo',
-      'i64_thing' => 1234567890,
-    );
-    $xtruct = new \ThriftTest\Xtruct($input);
+    public function testStringsAndInts()
+    {
+        $input = array(
+            'string_thing' => 'foo',
+            'i64_thing' => 1234567890,
+        );
+        $xtruct = new \ThriftTest\Xtruct($input);
 
-    // Xtruct's 'i32_thing' and 'byte_thing' fields should not be present here!
-    $expected = new stdClass();
-    $expected->string_thing = $input['string_thing'];
-    $expected->i64_thing = $input['i64_thing'];
-    $this->assertEquals($expected, json_decode(json_encode($xtruct)));
-  }
+        // Xtruct's 'i32_thing' and 'byte_thing' fields should not be present here!
+        $expected = new stdClass();
+        $expected->string_thing = $input['string_thing'];
+        $expected->i64_thing = $input['i64_thing'];
+        $this->assertEquals($expected, json_decode(json_encode($xtruct)));
+    }
 
-  public function testNestedStructs()
-  {
-    $xtruct2 = new \ThriftTest\Xtruct2(array(
-      'byte_thing' => 42,
-      'struct_thing' => new \ThriftTest\Xtruct(array(
-        'i32_thing' => 123456,
-      )),
-    ));
+    public function testNestedStructs()
+    {
+        $xtruct2 = new \ThriftTest\Xtruct2(array(
+            'byte_thing' => 42,
+            'struct_thing' => new \ThriftTest\Xtruct(array(
+                'i32_thing' => 123456,
+            )),
+        ));
 
-    $expected = new stdClass();
-    $expected->byte_thing = $xtruct2->byte_thing;
-    $expected->struct_thing = new stdClass();
-    $expected->struct_thing->i32_thing = $xtruct2->struct_thing->i32_thing;
-    $this->assertEquals($expected, json_decode(json_encode($xtruct2)));
-  }
+        $expected = new stdClass();
+        $expected->byte_thing = $xtruct2->byte_thing;
+        $expected->struct_thing = new stdClass();
+        $expected->struct_thing->i32_thing = $xtruct2->struct_thing->i32_thing;
+        $this->assertEquals($expected, json_decode(json_encode($xtruct2)));
+    }
 
-  public function testInsanity()
-  {
-    $xinput = array('string_thing' => 'foo');
-    $xtruct = new \ThriftTest\Xtruct($xinput);
-    $insanity = new \ThriftTest\Insanity(array(
-      'xtructs' => array($xtruct, $xtruct, $xtruct)
-    ));
-    $expected = new stdClass();
-    $expected->xtructs = array((object) $xinput, (object) $xinput, (object) $xinput);
-    $this->assertEquals($expected, json_decode(json_encode($insanity)));
-  }
+    public function testInsanity()
+    {
+        $xinput = array('string_thing' => 'foo');
+        $xtruct = new \ThriftTest\Xtruct($xinput);
+        $insanity = new \ThriftTest\Insanity(array(
+            'xtructs' => array($xtruct, $xtruct, $xtruct)
+        ));
+        $expected = new stdClass();
+        $expected->xtructs = array((object)$xinput, (object)$xinput, (object)$xinput);
+        $this->assertEquals($expected, json_decode(json_encode($insanity)));
+    }
 
-  public function testNestedLists()
-  {
-    $bonk = new \ThriftTest\Bonk(array('message' => 'foo'));
-    $nested = new \ThriftTest\NestedListsBonk(array('bonk' => array(array(array($bonk)))));
-    $expected = new stdClass();
-    $expected->bonk = array(array(array((object) array('message' => 'foo'))));
-    $this->assertEquals($expected, json_decode(json_encode($nested)));
-  }
+    public function testNestedLists()
+    {
+        $bonk = new \ThriftTest\Bonk(array('message' => 'foo'));
+        $nested = new \ThriftTest\NestedListsBonk(array('bonk' => array(array(array($bonk)))));
+        $expected = new stdClass();
+        $expected->bonk = array(array(array((object)array('message' => 'foo'))));
+        $this->assertEquals($expected, json_decode(json_encode($nested)));
+    }
 
-  public function testMaps()
-  {
-    $intmap = new \ThriftTest\ThriftTest_testMap_args(['thing' => [0 => 'zero']]);
-    $emptymap = new \ThriftTest\ThriftTest_testMap_args([]);
-    $this->assertEquals('{"thing":{"0":"zero"}}', json_encode($intmap));
-    $this->assertEquals('{}', json_encode($emptymap));
-  }
+    public function testMaps()
+    {
+        $intmap = new \ThriftTest\ThriftTest_testMap_args(['thing' => [0 => 'zero']]);
+        $emptymap = new \ThriftTest\ThriftTest_testMap_args([]);
+        $this->assertEquals('{"thing":{"0":"zero"}}', json_encode($intmap));
+        $this->assertEquals('{}', json_encode($emptymap));
+    }
 
-  public function testScalarTypes()
-  {
-    $b = new \ThriftTest\Bools(['im_true' => '1', 'im_false' => '0']);
-    $this->assertEquals('{"im_true":true,"im_false":false}', json_encode($b));
-    $s = new \ThriftTest\StructA(['s' => 42]);
-    $this->assertEquals('{"s":"42"}', json_encode($s));
-  }
-
+    public function testScalarTypes()
+    {
+        $b = new \ThriftTest\Bools(['im_true' => '1', 'im_false' => '0']);
+        $this->assertEquals('{"im_true":true,"im_false":false}', json_encode($b));
+        $s = new \ThriftTest\StructA(['s' => 42]);
+        $this->assertEquals('{"s":"42"}', json_encode($s));
+    }
 }