diff --git a/CHANGES.md b/CHANGES.md
index a5cfedf..ff64db4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,9 @@
-### 0.20.16 (2019-12-25 00:40:00 UTC)
+### 0.20.17 (2019-12-25 01:40:00 UTC)
+
+* Fix Synology DownloadStation test dev mode
+
+
+### 0.20.16 (2019-12-25 00:40:00 UTC)
 
 * Fix SkyTorrents provider
 * Fix download link quote url process
diff --git a/sickbeard/clients/download_station.py b/sickbeard/clients/download_station.py
index 0e75735..ee0be72 100644
--- a/sickbeard/clients/download_station.py
+++ b/sickbeard/clients/download_station.py
@@ -36,6 +36,7 @@ class DownloadStationAPI(GenericClient):
         self.url_info = self.url_base + 'query.cgi'
         self.url = self.url_base + 'DownloadStation/task.cgi'
         self._errmsg = None
+        self._testmode = False
 
     common_errors = {
         -1: 'Could not get a response', 100: 'Unknown error', 101: 'Invalid parameter',