diff --git a/README.md b/README.md
index ee724b2..3437d3c 100644
--- a/README.md
+++ b/README.md
@@ -41,20 +41,22 @@ In your app.local.php add an entry for EpsBankTransfer
 
 ```php
 [
-    'EpsBankTransfer', [
+    'EpsBankTransfer',
+    [
         // required parameters
-        'userid' => 'AKLJS231534', // Eps "Händler" id
-        'secret' => 'topSecret', // Secret for authentication
-        'iban' => 'AT611904300234573201', // IBAN code of bank account where money will be sent to
-        'bic' => 'GAWIATW1XXX', // BIC code of bank account where money will be sent to
+        'userid' => 'AKLJS231534',           // Eps "Händler" id
+        'secret' => 'topSecret',             // Secret for authentication
+        'iban' => 'AT611904300234573201',    // IBAN code of bank account where money will be sent to
+        'bic' => 'GAWIATW1XXX',              // BIC code of bank account where money will be sent to
         'account_owner' => 'John Q. Public', // Name of the account owner where money will be sent to
 
         // Encryption key for sending encrypted remittance identifier as encrypted string
         'encryptionKey' => 'A_SECRET_KEY_MUST_BE_32_BYTES_LONG',
 
         //// optional parameters
-        //'ObscuritySuffixLength' => 8,                            // Number of hash chars appended to remittance identifier
-        //'ObscuritySeed'  => 'SOME RANDOM STRING',                // Seed for the random remittance identifier suffix. REQUIRED when ObscuritySuffixLength > 0 provided
+        //'ObscuritySuffixLength' => 8,             // Number of hash chars appended to remittance identifier
+        //'ObscuritySeed'  => 'SOME RANDOM STRING', // Seed for the random remittance identifier suffix. REQUIRED when ObscuritySuffixLength > 0 provided
+        //'TestMode' => true                        // Use EPS test mode URL endpoint
     ]
 ];
 ```
diff --git a/composer.json b/composer.json
index 766bc33..d457330 100644
--- a/composer.json
+++ b/composer.json
@@ -30,6 +30,7 @@
         "installer-name": "EpsBankTransfer"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.0"
+        "phpunit/phpunit": "^6.0",
+        "hakito/publisher": "^1.3"
     }
 }
diff --git a/src/Controller/Component/EpsComponent.php b/src/Controller/Component/EpsComponent.php
index 587cde4..99c9e65 100644
--- a/src/Controller/Component/EpsComponent.php
+++ b/src/Controller/Component/EpsComponent.php
@@ -38,11 +38,12 @@ public function initialize(array $config)
         $defaults = array(
             'ObscuritySuffixLength' => 8,
             'ObscuritySeed'  => 'c2af496ecf4b9f095447a7b9f5c02d20924252bd',
+            'TestMode' => false
             );
 
         $config = array_merge($defaults, Configure::read('EpsBankTransfer'));
 
-        $SoCommunicator = Plugin::GetSoCommunicator();
+        $SoCommunicator = Plugin::GetSoCommunicator($config['TestMode']);
         $SoCommunicator->ObscuritySuffixLength = $config['ObscuritySuffixLength'];
         $SoCommunicator->ObscuritySeed = $config['ObscuritySeed'];
 
@@ -132,7 +133,8 @@ public function PaymentRedirect($remittanceIdentifier, $TransactionOkUrl, $Trans
         $logPrefix = 'SendPaymentOrder [' . $referenceIdentifier . '] ConfUrl: ' . $confirmationUrl;
 
         Plugin::WriteLog($logPrefix . ' over ' . $transferInitiatorDetails->InstructedAmount);
-        $plain = Plugin::GetSoCommunicator()->SendTransferInitiatorDetails($transferInitiatorDetails);
+        $testMode = !empty($config['TestMode']);
+        $plain = Plugin::GetSoCommunicator($testMode)->SendTransferInitiatorDetails($transferInitiatorDetails);
         $xml = new \SimpleXMLElement($plain);
         $soAnswer = $xml->children(eps_bank_transfer\XMLNS_epsp);
         /** @noinspection PhpUndefinedFieldInspection */
@@ -211,6 +213,7 @@ public function HandleConfirmationUrl($eRemittanceIdentifier, $rawPostStream = '
             return !empty($result['handled']);
         };
 
+        $testMode = !empty($config['TestMode']);
         try {
             Plugin::GetSoCommunicator()->HandleConfirmationUrl(
                     $confirmationCallbackWrapper,
diff --git a/src/Plugin.php b/src/Plugin.php
index 0086c6b..040ec15 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -11,8 +11,8 @@
  */
 class Plugin extends BasePlugin
 {
-    /** @var SoCommunicator */
-    public static $SoCommunicator;
+    /** @var SoCommunicator[] */
+    private static $SoCommunicator = [];
 
     /** @var string prefix for caching keys in this component */
     public static $CacheKeyPrefix = 'EpsBankTransfer';
@@ -30,13 +30,13 @@ public static function Base64Decode($s)
         return base64_decode(str_replace(array(',', '-'), array('\\', '/'), $s));
     }
 
-    public static function GetBanksArray($invalidateCache, $config = 'default')
+    public static function GetBanksArray($invalidateCache, $config = 'default', $testMode = false)
     {
         $key = self::$CacheKeyPrefix . 'BanksArray';
         $banks = Cache::read($key, $config);
         if (!$banks || $invalidateCache)
         {
-            $banks = Plugin::GetSoCommunicator()->TryGetBanksArray();
+            $banks = Plugin::GetSoCommunicator($testMode)->TryGetBanksArray();
             if (!empty($banks))
                 Cache::write($key, $banks, $config);
         }
@@ -47,14 +47,15 @@ public static function GetBanksArray($invalidateCache, $config = 'default')
      * Get scheme operator instance
      * @return \at\externet\eps_bank_transfer\SoCommunicator
      */
-    public static function GetSoCommunicator()
+    public static function GetSoCommunicator($testMode = false)
     {
-        if (self::$SoCommunicator == null)
+        $index = empty($testMode) ? 'live' : 'test';
+        if (empty(self::$SoCommunicator[$index]))
         {
-            self::$SoCommunicator = new \at\externet\eps_bank_transfer\SoCommunicator();
-            self::$SoCommunicator->LogCallback = [Plugin::class, 'WriteLog'];
+            self::$SoCommunicator[$index] = new \at\externet\eps_bank_transfer\SoCommunicator($testMode);
+            self::$SoCommunicator[$index]->LogCallback = [Plugin::class, 'WriteLog'];
         }
-        return self::$SoCommunicator;
+        return self::$SoCommunicator[$index];
     }
 
     public static function WriteLog($message)
diff --git a/tests/TestCase/Controller/Component/EpsComponentTest.php b/tests/TestCase/Controller/Component/EpsComponentTest.php
index a514dc8..b017a3e 100644
--- a/tests/TestCase/Controller/Component/EpsComponentTest.php
+++ b/tests/TestCase/Controller/Component/EpsComponentTest.php
@@ -43,7 +43,8 @@ public function setUp()
         $event = new Event('Controller.startup', $this->Controller);
         $this->Eps->startup($event);
 
-        Plugin::$SoCommunicator = $this->getMockBuilder('at\externet\eps_bank_transfer\SoCommunicator')
+        $published = new \hakito\Publisher\StaticPublished(Plugin::class);
+        $published->SoCommunicator['live'] = $this->getMockBuilder('at\externet\eps_bank_transfer\SoCommunicator')
             ->getMock();
         Plugin::$EnableLogging = false;
         Cache::clear();