diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
deleted file mode 100644
index f0537d9..0000000
--- a/.github/workflows/CI.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-# ==============================================================
-# CI with GitHub Actions
-# ==============================================================
-
-name: Build
-
-on:
-  - push
-  - pull_request
-
-env:
-  default-python: 3.9
-
-jobs:
-  testing:
-    uses: quatrope/ProperImage/.github/workflows/testing.yml@1391802a2d1fc3d61693041798d6fc12a39b5a29
\ No newline at end of file
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index d935d4e..10f0738 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -4,13 +4,10 @@
 name: Testing
 
 on:
-  workflow_call:
-
-# on:
-#   push:
-#     branches: [ master ]
-#   pull_request:
-#     branches: [ master ]
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 
 env:
   default-python: 3.10
diff --git a/setup.py b/setup.py
index 82ddf8f..5990ea5 100644
--- a/setup.py
+++ b/setup.py
@@ -23,12 +23,12 @@
 import os
 import sys
 
-from ez_setup import use_setuptools
+#from ez_setup import use_setuptools
 
 import setuptools
 
 
-use_setuptools()
+#use_setuptools()
 
 
 # =============================================================================
@@ -88,7 +88,7 @@ def do_setup():
         author="Bruno Sanchez",
         author_email="bruno@oac.unc.edu.ar",
         url="https://github.com/toros-astro/ProperImage",
-        py_modules=["ez_setup"],
+        #py_modules=["ez_setup"],
         license="BSD 3",
         keywords="astronomy image",
         classifiers=[
@@ -99,7 +99,6 @@ def do_setup():
             "Operating System :: OS Independent",
             "Programming Language :: Python",
             "Programming Language :: Python :: 3",
-            "Programming Language :: Python :: 3.6",
             "Programming Language :: Python :: 3.7",
             "Programming Language :: Python :: 3.8",
             "Programming Language :: Python :: 3.9",
diff --git a/tox.ini b/tox.ini
index b26eee5..ea4340d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,17 +1,16 @@
-
 # =============================================================================
 # CONF
 # =============================================================================
 
-; [gh-actions]
-; python =
-;     3.7: py37
-;     3.8: py38
-;     3.9: py39
-;     3.10: py310, style, docstyle, check-manifest, docs, coverage
+[gh-actions]
+python =
+    3.7: py37
+    3.8: py38
+    3.9: py39
+    3.10: py310, style, docstyle, check-manifest, docs, coverage
 
-; [pytest]
-; addopts = -n "auto"
+[pytest]
+addopts = -n "auto"
 
 
 # =============================================================================
@@ -92,10 +91,14 @@ usedevelop = True
 skip_install = False
 changedir = docs
 deps =
-    -r {toxinidir}/docs/requirements_docs.txt
+    Sphinx
+    nbsphinx
+    sphinx-autobuild
+    sphinx-rtd-theme
 commands =
     sphinx-build -W -b html -d {envtmpdir}/doctrees source {envtmpdir}/html
 
+; -r {toxinidir}/docs/requirements_docs.txt
 
 [testenv:docstyle]
 deps =
@@ -110,4 +113,4 @@ skip_install = True
 usedevelop = False
 deps = check-manifest
 commands =
-    check-manifest
\ No newline at end of file
+    check-manifest