diff --git a/python/setup-test-environment/build.gradle b/python/setup-test-environment/build.gradle
index 29bcc83f38fa..714b2e7b6419 100644
--- a/python/setup-test-environment/build.gradle
+++ b/python/setup-test-environment/build.gradle
@@ -82,7 +82,7 @@ envs {
                ["django==1.11", "tox", "nose", "pytest", "Twisted", "behave", "lettuce>=0.2.22", "unittest2", "teamcity-messages", "django-nose"]
                 + ( Os.isFamily(Os.FAMILY_WINDOWS) ? ['pypiwin32'] : []  ) //win32api is required for pypiwin32
                ,
-               "python2.7\ndjango\nnose\npytest\nbehave\nlettuce\npackaging\ntox\nunittest2\ntwisted\ndjango-nose",
+               "python2.7\ndjango\nnose\npytest\nbehave\nlettuce\npackaging\ntox\nunittest2\ntwisted==17.9\ndjango-nose",
                true)
 
   createPython("py35_django20_full",
@@ -143,21 +143,21 @@ task prepare(type: Delete) {
 
   doFirst {
     new File(envs.bootstrapDirectory, "django_latest").with { djangoLatestFolder ->
-      if (djangoLatestFolder.exists() && djangoLatestFolder.lastModified() < System.currentTimeMillis() - 24 * 60 * 60 * 1000) {
+ //     if (djangoLatestFolder.exists() && djangoLatestFolder.lastModified() < System.currentTimeMillis() - 24 * 60 * 60 * 1000) {
         // older then a day
         println "Cleaning django_latest at" + djangoLatestFolder
         delete djangoLatestFolder
-      }
+   //   }
     }
 
-    if (!envs.bootstrapDirectory.exists() || (System.getenv("NO_CLEAN") == null && envs.envsDirectory.exists() &&
-                                              envs.envsDirectory.lastModified() < project.buildscript.sourceFile.lastModified())) {
+//    if (!envs.bootstrapDirectory.exists() || (System.getenv("NO_CLEAN") == null && envs.envsDirectory.exists() &&
+  //                                            envs.envsDirectory.lastModified() < project.buildscript.sourceFile.lastModified())) {
       // clean the cache if the build script was modified later
       println "Cleaning cached environments at " + envs.envsDirectory
       delete envs.envsDirectory
       println "Cleaning cached pythons at " + envs.bootstrapDirectory
       delete envs.bootstrapDirectory
-    }
+    //}
   }
 }