diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..baf6b9d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.buildpath
+.project
+.settings/
diff --git a/.travis.yml b/.travis.yml
index f0044d3..7a080b9 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,9 @@ php:
 before_script:
   - printf "\n" | pecl install imagick
   - wget http://selenium.googlecode.com/files/selenium-server-standalone-2.35.0.jar
-  - java -jar selenium-server-standalone-2.35.0.jar -port 4444 &
+  - java -jar selenium-server-standalone-2.35.0.jar -port 4444 >/dev/null 2>&1 &
   - cd test/integration/
-  
+  - mkdir tests/_log
 
-script: php -d include_path="." codecept.phar run
+
+script: php codecept.phar run -d
\ No newline at end of file
diff --git a/module/VisualCeption.php b/module/VisualCeption.php
index ff8779e..149763d 100755
--- a/module/VisualCeption.php
+++ b/module/VisualCeption.php
@@ -7,6 +7,10 @@
  * @copyright Copyright (c) 2014 G+J Digital Products GmbH
  * @license MIT license, http://www.opensource.org/licenses/mit-license.php
  * @package Codeception\Module
+ *
+ * @author Nils Langner <langner.nils@guj.de>
+ * @author Torsten Franz
+ * @author Sebastian Neubert
  */
 class VisualCeption extends \Codeception\Module
 {
@@ -53,11 +57,12 @@ private function init ()
         if (array_key_exists('referenceImageDir', $this->config)) {
             $this->referenceImageDir = $this->config["referenceImageDir"];
         } else {
-            throw new \RuntimeException("Reference image dir was not set, but is mandatory.");
+            $this->referenceImageDir = \Codeception\Configuration::dataDir() . 'VisualCeption/';
         }
 
         if (! is_dir($this->referenceImageDir)) {
-            mkdir($this->referenceImageDir, 0666);
+            $this->debug("Creating directory: $this->referenceImageDir");
+            mkdir($this->referenceImageDir, 0777, true);
         }
     }
 
@@ -112,7 +117,13 @@ private function getScreenshotPath ($identifier)
     {
         $debugDir = \Codeception\Configuration::logDir() . 'debug/tmp/';
         if (! is_dir($debugDir)) {
-            mkdir($debugDir, 0666);
+            $created = mkdir($debugDir, 0777, true);
+            if( $created ) {
+            $this->debug("Creating directory: $debugDir");
+            }else{
+                throw new \RuntimeException("Unable to create temporary screenshot dir ($debugDir)");
+            }
+
         }
         return $debugDir . $this->getScreenshotName($identifier);
     }
@@ -160,7 +171,7 @@ private function createScreenshot ($identifier, array $coords)
      * and their element ID
      *
      * @param string $identifier identifies your test object
-     * @param null $elementID DOM ID of the element, which should be screenshotted
+     * @param string $elementID DOM ID of the element, which should be screenshotted
      */
     public function compareScreenshot ($identifier, $elementID = null)
     {
@@ -171,8 +182,6 @@ public function compareScreenshot ($identifier, $elementID = null)
 
         unlink($this->getScreenshotPath($identifier));
 
-        $this->debug($compareResult);
-
         $deviation = round($compareResult[1] * 100, 2);
 
         if ($deviation > $this->maximumDeviation) {
@@ -207,6 +216,7 @@ private function compare ($identifier)
         $expectedImagePath = $this->getExpectedScreenshotPath($identifier);
 
         if (! file_exists($expectedImagePath)) {
+            $this->debug("Copying image (from $currentImagePath to $expectedImagePath");
             copy($currentImagePath, $expectedImagePath);
             return array (null, 0);
         } else {
@@ -229,8 +239,6 @@ private function compareImages ($image1, $image2)
         $result = $imagick1->compareImages($imagick2, \Imagick::METRIC_MEANSQUAREERROR);
         $result[0]->setImageFormat("png");
 
-        $this->debug($result);
-
         return $result;
     }
 }
diff --git a/readme.md b/readme.md
index 5d1bf4f..4de3619 100644
--- a/readme.md
+++ b/readme.md
@@ -42,7 +42,8 @@ modules:
     enabled: [WebDriver, VisualCeption]
     
 VisualCeption:
-    referenceImageDir: /home/codeception/referenceImages/ # Path to the reference folder
+    referenceImageDir: /home/codeception/referenceImages/ # Path to the reference folder (optional, standard is 
+                                                          # <datadir>/VisualCeption/)
     maximumDeviation: 5                                   # deviation in percent
 ```
 
diff --git a/test/integration/tests/_bootstrap.php b/test/integration/tests/_bootstrap.php
index 90dd4ac..de650d0 100755
--- a/test/integration/tests/_bootstrap.php
+++ b/test/integration/tests/_bootstrap.php
@@ -1,4 +1,6 @@
 <?php
 // This is global bootstrap for autoloading
 
+sleep(5);
+
 include_once __DIR__."/../../../module/VisualCeption.php";
\ No newline at end of file
diff --git a/test/integration/tests/_data/dump.sql b/test/integration/tests/_data/dump.sql
deleted file mode 100644
index 4bc742c..0000000
--- a/test/integration/tests/_data/dump.sql
+++ /dev/null
@@ -1 +0,0 @@
-/* Replace this file with actual dump of your database */
\ No newline at end of file
diff --git a/test/integration/tests/_log/TimeComparisonCest.compareTimeString.fail.png b/test/integration/tests/_log/TimeComparisonCest.compareTimeString.fail.png
deleted file mode 100644
index 9cd5fda..0000000
Binary files a/test/integration/tests/_log/TimeComparisonCest.compareTimeString.fail.png and /dev/null differ
diff --git a/test/integration/tests/_log/acceptance-2014-03-24 b/test/integration/tests/_log/acceptance-2014-03-24
deleted file mode 100644
index dbe6082..0000000
--- a/test/integration/tests/_log/acceptance-2014-03-24
+++ /dev/null
@@ -1,34 +0,0 @@
-[2014-03-24 15:53:02] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:53:02] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:53:02] TimeComparisonCest.compareTimeString.ALERT: mkdir(): No such file or directory [] []
-[2014-03-24 15:53:02] TimeComparisonCest.compareTimeString.INFO: # ERROR # [] []
-[2014-03-24 15:53:02] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
-[2014-03-24 15:54:13] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:54:13] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:54:13] TimeComparisonCest.compareTimeString.ALERT: unable to open image `/app1/ela/var/www/app/test.local/VisualCeption/test/integration/tests/_log/debug/tmp/TimeComparisonCest.compareTimeString.the-time.png': Permission denied @ blob.c/OpenBlob/2480 [] []
-[2014-03-24 15:54:13] TimeComparisonCest.compareTimeString.INFO: # ERROR # [] []
-[2014-03-24 15:54:13] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
-[2014-03-24 15:54:55] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:54:55] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:54:55] TimeComparisonCest.compareTimeString.ALERT: unable to open image `/app1/ela/var/www/app/test.local/VisualCeption/test/integration/tests/_log/debug/tmp/TimeComparisonCest.compareTimeString.the-time.png': Permission denied @ blob.c/OpenBlob/2480 [] []
-[2014-03-24 15:54:55] TimeComparisonCest.compareTimeString.INFO: # ERROR # [] []
-[2014-03-24 15:54:55] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
-[2014-03-24 15:55:19] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:55:20] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:56:01] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:56:01] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:56:11] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:56:11] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:56:12] TimeComparisonCest.compareTimeString.ALERT: unable to open image `/app1/ela/var/www/app/test.local/VisualCeption/test/integration/tests/_log/debug/tmp/TimeComparisonCest.compareTimeString.the-time.png': Permission denied @ blob.c/OpenBlob/2480 [] []
-[2014-03-24 15:56:12] TimeComparisonCest.compareTimeString.INFO: # ERROR # [] []
-[2014-03-24 15:56:12] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
-[2014-03-24 15:57:51] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:57:51] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:57:51] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
-[2014-03-24 15:57:57] TimeComparisonCest.compareTimeString.INFO: am on page "/VisualCeption/time.php" [] []
-[2014-03-24 15:57:57] TimeComparisonCest.compareTimeString.INFO: compare screenshot "the-time","#thetime" [] []
-[2014-03-24 15:57:58] TimeComparisonCest.compareTimeString.ALERT: The deviation of the taken screenshot is too high (0.18%).
-See /app1/ela/var/www/app/test.local/VisualCeption/test/integration/tests/_log/debug/compare.TimeComparisonCest.compareTimeString.the-time.png for a deviation screenshot.
-Failed asserting that false is true. [] []
-[2014-03-24 15:57:58] TimeComparisonCest.compareTimeString.INFO: # FAILED # [] []
-[2014-03-24 15:57:58] TimeComparisonCest.compareTimeString.INFO: PASSED [] []
diff --git a/test/integration/tests/_log/debug/compare.TimeComparisonCest.compareTimeString.the-time.png b/test/integration/tests/_log/debug/compare.TimeComparisonCest.compareTimeString.the-time.png
deleted file mode 100644
index f088c60..0000000
Binary files a/test/integration/tests/_log/debug/compare.TimeComparisonCest.compareTimeString.the-time.png and /dev/null differ
diff --git a/test/integration/tests/acceptance.suite.yml b/test/integration/tests/acceptance.suite.yml
index 5d464a6..71c3644 100755
--- a/test/integration/tests/acceptance.suite.yml
+++ b/test/integration/tests/acceptance.suite.yml
@@ -23,5 +23,4 @@ modules:
             capabilities:
                 webStorageEnabled: true
         VisualCeption:
-            maximumDeviation: 0
-            referenceImageDir: /tmp/deviation/
+            maximumDeviation: 0
\ No newline at end of file
diff --git a/test/integration/tests/acceptance/TimeComparisonCest.php b/test/integration/tests/acceptance/TimeComparisonCest.php
index 2590f13..455660b 100755
--- a/test/integration/tests/acceptance/TimeComparisonCest.php
+++ b/test/integration/tests/acceptance/TimeComparisonCest.php
@@ -10,5 +10,9 @@ public function compareTimeString (WebGuy $I, $scenario)
     {
         $I->amOnPage("/VisualCeption/time.php");
         $I->compareScreenshot("the-time", "#thetime");
+
+        // the test has to be called twice for comparison on the travis server
+        $I->amOnPage("/VisualCeption/time.php");
+        $I->compareScreenshot("the-time", "#thetime");
     }
 }
\ No newline at end of file