diff --git a/t/python/spooler.ini b/t/python/spooler_decorators/spooler_decorator_test.ini
similarity index 71%
rename from t/python/spooler.ini
rename to t/python/spooler_decorators/spooler_decorator_test.ini
index 3b95ba8e..352f1aee 100644
--- a/t/python/spooler.ini
+++ b/t/python/spooler_decorators/spooler_decorator_test.ini
@@ -2,9 +2,10 @@
 socket = /tmp/temporary_socket
 
 ; Spooler!
-spooler-import = %d/spooler_handler.py
+
+spooler-import = %d/spooler_handlers.py
 ; Specify the spooler
-spooler = %d/temporary_spooler
+spooler = $(SPOOLER_DIR)
 ; And the number of processes
 spooler-processes = 1
 ; Spooler ordered scanning (only works with "numbered" dirs)
@@ -12,6 +13,6 @@ spooler-ordered = 1
 ; Spooler frequency
 spooler-frequency = 1
 
-pyrun = %d/spooler.py
+pyrun = %d/spooler_decorator_tests.py
 master = 1
 
diff --git a/t/python/spooler_decorators/spooler_decorator_tests.py b/t/python/spooler_decorators/spooler_decorator_tests.py
new file mode 100644
index 00000000..ec72e399
--- /dev/null
+++ b/t/python/spooler_decorators/spooler_decorator_tests.py
@@ -0,0 +1,31 @@
+# run it with:
+# export SPOOLER_DIR=t/python/spooler_priority/temporary_spooler; # or your spooler dir
+# ./uwsgi t/python/spooler_decorators/spooler_decorator_test.ini
+
+import unittest
+import uwsgi
+import spooler_handlers
+from os import remove, path
+
+
+class BitmapTest(unittest.TestCase):
+
+    def setUp(self):
+        try:
+            remove(spooler_handlers.ghostpath)
+        except OSError:  # file does not exist
+            pass
+
+        spooler_handlers.controlled_task.spool(arg='alive', ghost='world')
+        spooler_handlers.controlled_task.spool(arg='barbis')
+        spooler_handlers.controlled_raw_task.spool(arg='alive', ghost='world')
+        spooler_handlers.controlled_raw_task.spool(arg='barbis')
+
+        for i in range(4):
+            uwsgi.signal_wait(20)
+        print("Signal received!")
+
+    def test_spooler(self):
+        self.assertFalse(path.exists(spooler_handlers.ghostpath))
+
+unittest.main()
diff --git a/t/python/spooler_decorators/spooler_handlers.py b/t/python/spooler_decorators/spooler_handlers.py
new file mode 100644
index 00000000..5298f91c
--- /dev/null
+++ b/t/python/spooler_decorators/spooler_handlers.py
@@ -0,0 +1,23 @@
+# See spooler_decorator_tests
+
+from uwsgidecorators import *
+import uwsgi
+
+ghostpath = "/tmp/ghost"
+
+
+@spool
+def controlled_task(arguments):
+    if arguments['arg'] != 'alive' and 'ghost' in arguments:
+        print("We have a problem!")
+        open(ghostpath, 'w').close()
+    uwsgi.signal(20)
+
+
+@spoolraw
+def controlled_raw_task(arguments):
+    if arguments['arg'] != 'alive' and 'ghost' in arguments:
+        print("We have a problem!")
+        open(ghostpath, 'w').close()
+    uwsgi.signal(20)
+    return uwsgi.SPOOL_OK
diff --git a/t/python/constants.py b/t/python/spooler_priority/spooler_priority_constants.py
similarity index 100%
rename from t/python/constants.py
rename to t/python/spooler_priority/spooler_priority_constants.py
diff --git a/t/python/spooler_priority/spooler_priority_handler.py b/t/python/spooler_priority/spooler_priority_handler.py
new file mode 100644
index 00000000..f0e151e4
--- /dev/null
+++ b/t/python/spooler_priority/spooler_priority_handler.py
@@ -0,0 +1,33 @@
+#! /usr/bin/env python
+# coding = utf-8
+
+from __future__ import print_function
+from constants import tasks, LOGFILE
+from os import remove
+import uwsgi
+
+counter = 0
+
+
+def spoolerHandler(env):
+	global counter
+	# Spooler is handling a task
+	with open(LOGFILE, "a") as log:
+		print("%s" % (env['name']), file=log)
+
+	counter += 1
+
+	if counter == len(tasks):
+		# Each task has been processed.
+		uwsgi.signal(17)
+
+	# Spooler has done handling the task
+	return uwsgi.SPOOL_OK
+
+uwsgi.spooler = spoolerHandler
+
+# Clear the logfile
+try:
+	remove(LOGFILE)
+except OSError, e:  # log does not exist
+	print(e)
diff --git a/t/python/spooler_priority/spooler_priority_test.ini b/t/python/spooler_priority/spooler_priority_test.ini
new file mode 100644
index 00000000..0076fe6d
--- /dev/null
+++ b/t/python/spooler_priority/spooler_priority_test.ini
@@ -0,0 +1,17 @@
+[uwsgi]
+socket = /tmp/temporary-socket
+
+; Specify the spooler
+spooler = %d/temporary_spooler
+; Spooler handler
+spooler-import = %d/spooler_priority_handler.py
+; And the number of processes
+spooler-processes = 1
+; Spooler ordered scanning (only works with "numbered" dirs)
+spooler-ordered = 1
+; Spooler scans folder each second
+spooler-frequency = 1
+
+pyrun = %d/spooler_priority_test.py
+master = 1
+
diff --git a/t/python/spooler.py b/t/python/spooler_priority/spooler_priority_test.py
similarity index 85%
rename from t/python/spooler.py
rename to t/python/spooler_priority/spooler_priority_test.py
index 04faaba3..5b255b26 100644
--- a/t/python/spooler.py
+++ b/t/python/spooler_priority/spooler_priority_test.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python
 # coding = utf-8
 
 import uwsgi
@@ -7,8 +7,7 @@ import os
 import fcntl
 from shutil import rmtree
 import time
-import constants
-from signal import *
+import spooler_priority_constants
 
 
 def spoolersTaskList():
@@ -62,8 +61,7 @@ def cleanTasks():
 class BitmapTest(unittest.TestCase):
 
 	def setUp(self):
-		self.addCleanup(cleanTasks)
-		for priority, name in constants.tasks:
+		for priority, name in spooler_priority_constants.tasks:
 			task = {'name': name, 'at': int(time.time() + 10)}
 			if priority is not None:
 				task['priority'] = str(priority)
@@ -73,10 +71,10 @@ class BitmapTest(unittest.TestCase):
 		uwsgi.signal_wait(17)
 		print("Signal received.")
 
-		with open(constants.LOGFILE, "r") as log:
+		with open(spooler_priority_constants.LOGFILE, "r") as log:
 			# Check logging ordering.
 			loglines = [line.rstrip() for line in log]
-			self.assertEqual(loglines, constants.ordered_tasks)
+			self.assertEqual(loglines, spooler_priority_constants.ordered_tasks)
 
 signal(SIGINT, cleanTasks)
 unittest.main()
diff --git a/uwsgidecorators.py b/uwsgidecorators.py
index ec24edc5..290ee666 100644
--- a/uwsgidecorators.py
+++ b/uwsgidecorators.py
@@ -18,6 +18,29 @@ mule_functions = {}
 postfork_chain = []
 
 
+# Python3 compatibility
+def _encode1(val):
+    if sys.version_info >= (3, 0) and isinstance(val, str):
+        return val.encode('utf-8')
+    else:
+        return val
+
+
+def _decode1(val):
+    if sys.version_info >= (3, 0) and isinstance(val, bytes):
+        return val.decode('utf-8')
+    else:
+        return val
+
+
+def _encode_to_spooler(vars):
+    return dict((_encode1(K), _encode1(V)) for (K, V) in vars.items())
+
+
+def _decode_from_spooler(vars):
+    return dict((_decode1(K), _decode1(V)) for (K, V) in vars.items())
+
+
 def get_free_signal():
     for signum in range(0, 256):
         if not uwsgi.signal_registered(signum):
@@ -27,6 +50,7 @@ def get_free_signal():
 
 
 def manage_spool_request(vars):
+    vars = _decode_from_spooler(vars)
     f = spooler_functions[vars['ud_spool_func']]
     if 'args' in vars:
         args = pickle.loads(vars.pop('args'))
@@ -48,6 +72,7 @@ uwsgi.post_fork_hook = postfork_chain_hook
 
 
 class postfork(object):
+
     def __init__(self, f):
         if callable(f):
             self.wid = 0
@@ -56,6 +81,7 @@ class postfork(object):
             self.f = None
             self.wid = f
         postfork_chain.append(self)
+
     def __call__(self, *args, **kwargs):
         if self.f:
             if self.wid > 0 and self.wid != uwsgi.worker_id():
@@ -67,7 +93,7 @@ class postfork(object):
 class _spoolraw(object):
 
     def __call__(self, *args, **kwargs):
-        arguments = self.base_dict
+        arguments = self.base_dict.copy()
         if not self.pass_arguments:
             if len(args) > 0:
                 arguments.update(args[0])
@@ -79,8 +105,9 @@ class _spoolraw(object):
                 if key in kwargs:
                     spooler_args.update({key: kwargs.pop(key)})
             arguments.update(spooler_args)
-            arguments.update({'args': pickle.dumps(args), 'kwargs': pickle.dumps(kwargs)})
-        return uwsgi.spool(arguments)
+            arguments.update(
+                {'args': pickle.dumps(args), 'kwargs': pickle.dumps(kwargs)})
+        return uwsgi.spool(_encode_to_spooler(arguments))
 
     # For backward compatibility (uWSGI < 1.9.13)
     def spool(self, *args, **kwargs):
@@ -234,6 +261,7 @@ class mule_brainloop(mule_brain):
 
 
 class mule(object):
+
     def __init__(self, num):
         self.num = num
 
@@ -242,6 +270,7 @@ class mule(object):
 
 
 class muleloop(mule):
+
     def __call__(self, f):
         postfork_chain.append(mule_brainloop(f, self.num))
 
@@ -261,6 +290,7 @@ class mulemsg_loop(object):
 
 
 class mulemsg(object):
+
     def __init__(self, num):
         self.num = num
 
@@ -306,7 +336,7 @@ class cron(object):
     def __call__(self, f):
         uwsgi.register_signal(self.num, self.target, f)
         uwsgi.add_cron(self.num, self.minute, self.hour,
-            self.day, self.month, self.dayweek)
+                       self.day, self.month, self.dayweek)
         return f
 
 
@@ -347,6 +377,7 @@ class erlang(object):
 
 
 class lock(object):
+
     def __init__(self, f):
         self.f = f