diff --git a/tests/unit/workflow/engine/classes/DerivationTest.php b/tests/unit/workflow/engine/classes/DerivationTest.php
index ca42ee585..da821037e 100644
--- a/tests/unit/workflow/engine/classes/DerivationTest.php
+++ b/tests/unit/workflow/engine/classes/DerivationTest.php
@@ -2,7 +2,17 @@
 
 namespace Tests\unit\workflow\engine\classes;
 
-use \Derivation;
+use Cases;
+use Derivation;
+use G;
+use Illuminate\Support\Facades\DB;
+use ProcessMaker\Model\Application;
+use ProcessMaker\Model\Delegation;
+use ProcessMaker\Model\Process;
+use ProcessMaker\Model\Route;
+use ProcessMaker\Model\Task;
+use ProcessMaker\Model\TaskUser;
+use ProcessMaker\Model\User;
 use Tests\TestCase;
 
 class DerivationTest extends TestCase
@@ -15,6 +25,41 @@ class DerivationTest extends TestCase
     {
         parent::setUp(); // TODO: Change the autogenerated stub
 
+        // Truncate the APP_SEQUENCE table
+        DB::table('APP_SEQUENCE')->truncate();
+
+        config(["system.workspace" => "test"]);
+        $workspace = config("system.workspace");
+
+        if (!file_exists(PATH_DB . $workspace)) {
+            G::mk_dir(PATH_DB . $workspace);
+        }
+
+        if (!file_exists(PATH_DB . $workspace . PATH_SEP . "db.php")) {
+            $myfile = fopen(PATH_DB . $workspace . PATH_SEP . "db.php", "w");
+            fwrite($myfile, "<?php
+define ('DB_ADAPTER',     'mysql' );
+define ('DB_HOST',        '" . env('DB_HOST') . "' );
+define ('DB_NAME',        '" . env('DB_DATABASE') . "' );
+define ('DB_USER',        '" . env('DB_USERNAME') . "' );
+define ('DB_PASS',        '" . env('DB_PASSWORD') . "' );
+define ('DB_RBAC_HOST',   '" . env('DB_HOST') . "' );
+define ('DB_RBAC_NAME',   '" . env('DB_DATABASE') . "' );
+define ('DB_RBAC_USER',   '" . env('DB_USERNAME') . "' );
+define ('DB_RBAC_PASS',   '" . env('DB_PASSWORD') . "' );
+define ('DB_REPORT_HOST', '" . env('DB_HOST') . "' );
+define ('DB_REPORT_NAME', '" . env('DB_DATABASE') . "' );
+define ('DB_REPORT_USER', '" . env('DB_USERNAME') . "' );
+define ('DB_REPORT_PASS', '" . env('DB_PASSWORD') . "' );");
+        }
+    }
+
+    /**
+     * Call the tearDown method
+     */
+    public function tearDown()
+    {
+        parent::tearDown(); // TODO: Change the autogenerated stub
     }
 
     /**
@@ -80,4 +125,139 @@ class DerivationTest extends TestCase
         $this->assertObjectHasAttribute('name', $res['var3_label']);
         $this->assertEquals($res['var3_label'], (object)['Street' => 'test', 'name' => 'Something']);
     }
+
+    /**
+     * It tests the doDerivation method sending variables synchronously
+     *
+     * @covers Derivation::doDerivation()
+     * @test
+     */
+    public function it_should_test_the_do_derivation_method_sending_variables_synchronously()
+    {
+        // Create the models
+        $user = factory(User::class)->create();
+        $process = factory(Process::class)->create([
+            'PRO_CREATE_USER' => $user->USR_UID
+        ]);
+        $task = factory(Task::class)->create([
+            'PRO_UID' => $process->PRO_UID,
+        ]);
+        $application = factory(Application::class)->create();
+        $appDelegation = factory(Delegation::class)->create();
+
+        // Create the parameters
+        $currentDelegation = [
+            'APP_UID' => $application->APP_UID,
+            'DEL_INDEX' => $appDelegation->DEL_INDEX,
+            'ROU_TYPE' => ''
+        ];
+        $nextDel = [
+            'TAS_UID' => $task->TAS_UID,
+            'USR_UID' => $user->USR_UID,
+            'DEL_PRIORITY' => $appDelegation->DEL_PRIORITY,
+            'TAS_ASSIGN_TYPE' => $task->TAS_ASSIGN_TYPE,
+            'TAS_ID' => $task->TAS_ID
+        ];
+        $appFields = [
+            'APP_NUMBER' => $application->APP_NUMBER,
+            'DEL_THREAD' => $appDelegation->DEL_THREAD,
+            'PRO_UID' => $process->PRO_UID,
+            'PRO_ID' => $process->PRO_ID,
+            'APP_DATA' => [],
+            'APP_TITLE' => $application->APP_TITLE,
+            'APP_UID' => $application->APP_UID
+        ];
+        $sp = [
+            'SP_VARIABLES_OUT' => 'a:1:{s:6:"@&var1";s:6:"@&var2";}',
+            'SP_VARIABLES_IN' => 'a:1:{s:6:"@&var2";s:6:"@&var3";}',
+            'SP_SYNCHRONOUS' => '1',
+            'SP_TYPE' => '',
+            'TAS_UID' => $task->TAS_UID,
+            'USR_UID' => $user->USR_UID,
+        ];
+
+        // Create the Derivation object
+        $der = new Derivation();
+        $der->case = new Cases;
+
+        // Call the doDerivation method
+        $res = $der->doDerivation($currentDelegation, $nextDel, $appFields, $sp);
+
+        // Assert the new delegation index is 1
+        $this->assertEquals(1, $res);
+    }
+
+    /**
+     * It tests the doDerivation method sending variables asynchronously
+     *
+     * @covers Derivation::doDerivation()
+     * @test
+     */
+    public function it_should_test_the_do_derivation_method_sending_variables_asynchronously()
+    {
+        // Create the models
+        $user = factory(User::class)->create();
+        $process = factory(Process::class)->create([
+            'PRO_CREATE_USER' => $user->USR_UID
+        ]);
+        $task = factory(Task::class)->create([
+            'PRO_UID' => $process->PRO_UID,
+            'TAS_USER' => $user->USR_UID
+        ]);
+        factory(TaskUser::class)->create([
+            'TAS_UID' => $task->TAS_UID,
+            'USR_UID' => $user->USR_UID,
+        ]);
+        $application = factory(Application::class)->create();
+        $appDelegation = factory(Delegation::class)->create([
+            'TAS_UID' => $task->TAS_UID
+        ]);
+        factory(Route::class)->create([
+            'TAS_UID' => $task->TAS_UID,
+            'ROU_NEXT_TASK' => $task->TAS_UID,
+            'PRO_UID' => $process->PRO_UID
+        ]);
+
+        // Create the parameters
+        $currentDelegation = [
+            'APP_UID' => $application->APP_UID,
+            'DEL_INDEX' => $appDelegation->DEL_INDEX,
+            'ROU_TYPE' => '',
+            'TAS_UID' => $task->TAS_UID
+        ];
+        $nextDel = [
+            'TAS_UID' => $task->TAS_UID,
+            'USR_UID' => $user->USR_UID,
+            'DEL_PRIORITY' => $appDelegation->DEL_PRIORITY,
+            'TAS_ASSIGN_TYPE' => $task->TAS_ASSIGN_TYPE,
+            'TAS_ID' => $task->TAS_ID
+        ];
+        $appFields = [
+            'APP_NUMBER' => $application->APP_NUMBER,
+            'DEL_THREAD' => $appDelegation->DEL_THREAD,
+            'PRO_UID' => $process->PRO_UID,
+            'PRO_ID' => $process->PRO_ID,
+            'APP_DATA' => [],
+            'APP_TITLE' => $application->APP_TITLE,
+            'APP_UID' => $application->APP_UID
+        ];
+        $sp = [
+            'SP_VARIABLES_OUT' => 'a:1:{s:6:"@&var1";s:6:"@&var2";}',
+            'SP_VARIABLES_IN' => 'a:1:{s:6:"@&var2";s:6:"@&var3";}',
+            'SP_SYNCHRONOUS' => '0',
+            'SP_TYPE' => '',
+            'TAS_UID' => $task->TAS_UID,
+            'USR_UID' => $user->USR_UID,
+        ];
+
+        // Create the Derivation object
+        $der = new Derivation();
+        $der->case = new Cases;
+
+        // Call the doDerivation method
+        $res = $der->doDerivation($currentDelegation, $nextDel, $appFields, $sp);
+
+        // Assert the new delegation index is 1
+        $this->assertEquals(1, $res);
+    }
 }
\ No newline at end of file