diff --git a/.github/workflows/test_and_deploy.yml b/.github/workflows/test_and_deploy.yml
index 8b499f7..afc8d4f 100644
--- a/.github/workflows/test_and_deploy.yml
+++ b/.github/workflows/test_and_deploy.yml
@@ -23,12 +23,14 @@ jobs:
       matrix:
         platform: [ubuntu-latest, windows-latest, macos-latest]
         python-version: [3.7, 3.8, 3.9]
-        backend: [pyqt, pyside]
+        backend: [pyqt5, pyside2]
         include:
           - python: 3.9
             platform: macos-11.0
+            backend: pyside2
           - python: 3.6
             platform: ubuntu-16.04
+            backend: pyqt5
     steps:
       - uses: actions/checkout@v2
 
@@ -43,6 +45,7 @@ jobs:
           sudo apt-get install -y libdbus-1-3 libxkbcommon-x11-0 libxcb-icccm4 \
             libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 \
             libxcb-xinerama0 libxcb-xfixes0
+          # libxcb-xinput0
 
       - name: Install dependencies
         run: |
diff --git a/setup.cfg b/setup.cfg
index 1671f72..2bca758 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,6 +39,8 @@ setup_requires = setuptools_scm
 [options.extras_require]
 pyside2 = pyside2
 pyqt5 = pyqt5
+pyside6 = pyside6
+pyqt6 = pyqt6
 testing =
     tox
     tox-conda
diff --git a/tox.ini b/tox.ini
index 82d2aae..e040e40 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 # For more information about tox, see https://tox.readthedocs.io/en/latest/
 [tox]
-envlist = py{37,38,39}-{linux,macos,windows}-{pyqt,pyside}
+envlist = py{37,38,39}-{linux,macos,windows}-{pyqt5,pyside2}
 toxworkdir=/tmp/.tox
 
 [gh-actions]
@@ -20,8 +20,8 @@ PLATFORM =
     macos-latest: macos
     macos-11.0: macos
 BACKEND =
-    pyqt: pyqt
-    pyside: pyside
+    pyqt5: pyqt5
+    pyside2: pyside2
 
 [testenv]
 platform =
@@ -33,6 +33,6 @@ deps =
     pytest-xvfb ; sys_platform == 'linux'
 extras =
     testing
-    pyqt: pyqt5
-    pyside: pyside2
+    pyqt5: pyqt5
+    pyside2: pyside2
 commands = pytest -v --color=yes --cov=pyqrangeslider --cov-report=xml