diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ff45b064..08bea21b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,9 +42,8 @@ non_reg:
     when: always
   script:
     - cd test/yavscTests
-    - cp $TestingConfig appsettings.Testing.json
     - cp $yavsc_client_secret_json yavsc-client-secret.json
-    - ASPNET_ENV=Testing dnx test -maxthreads 1 -xml test-results.xml 
+    - ASPNET_ENV=Development dnx test -trait=Category=non_reg -maxthreads 1 -xml test-results.xml 
 
 release:
   stage: deploy
diff --git a/src/Yavsc/Startup/Startup.FileServer.cs b/src/Yavsc/Startup/Startup.FileServer.cs
index c0ea62d8..898a2a04 100644
--- a/src/Yavsc/Startup/Startup.FileServer.cs
+++ b/src/Yavsc/Startup/Startup.FileServer.cs
@@ -21,14 +21,6 @@ namespace Yavsc
     {
         public static IApplicationBuilder UseYaFileServer(this IApplicationBuilder builder, FileServerOptions options)
         {
-            if (builder == null)
-            {
-                throw new ArgumentNullException("builder");
-            }
-            if (options == null)
-            {
-                throw new ArgumentNullException("options");
-            }
             if (options == null)
             {
                 throw new ArgumentNullException("options");
@@ -46,10 +38,6 @@ namespace Yavsc
 
         public static IApplicationBuilder UseYaSendFileFallback(this IApplicationBuilder builder)
         {
-            if (builder == null)
-            {
-                throw new ArgumentNullException("builder");
-            }
             return builder.UseMiddleware<YaSendFileMiddleware>(new object[0]);
         }
     }
diff --git a/version.txt b/version.txt
index cee729d7..bec1ae31 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.6-rc18
+1.0.6-rc19