diff --git a/docs/conf.py b/docs/conf.py
index fb78af18..06ca2d4e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -28,7 +28,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ["myst_parser", "sphinxcontrib.bibtex"]
+extensions = ["myst_parser", "sphinxcontrib.bibtex", "sphinx_tabs.tabs"]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
diff --git a/docs/test/md.md b/docs/test/md.md
new file mode 100644
index 00000000..30718efe
--- /dev/null
+++ b/docs/test/md.md
@@ -0,0 +1,26 @@
+# Testing md
+
+
+````{tabs}
+```{tab} testa
+contenta
+```
+
+```{tab} testb
+contentb
+```
+````
+
+````{tabs}
+```{tab}
+testa
+contenta1
+contenta2
+```
+
+```{tab}
+testb
+contentb1
+contentb2
+```
+````
diff --git a/docs/test/rst.rst b/docs/test/rst.rst
new file mode 100644
index 00000000..0bf613fd
--- /dev/null
+++ b/docs/test/rst.rst
@@ -0,0 +1,25 @@
+Testing rst
+===========
+
+.. tabs::
+
+    .. tab:: testa
+
+        contenta
+
+    .. tab:: testb
+
+        contentb
+
+.. note::
+
+   normal
+
+.. note:: start writing
+   and don't
+   stop
+
+
+.. note:: start writing
+
+   with space
diff --git a/docs/using/index.md b/docs/using/index.md
index 60154a13..c7ba9768 100644
--- a/docs/using/index.md
+++ b/docs/using/index.md
@@ -6,4 +6,6 @@ Myst documents.
 ```{toctree}
 install.md
 syntax.md
+../test/md.md
+../test/rst.rst
 ```
diff --git a/setup.py b/setup.py
index a36dcefb..1df7e34e 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@
         )
     ],
     extras_require={
-        "sphinx": ["pyyaml", "docutils>=0.15", "sphinx>=2,<3"],
+        "sphinx": ["pyyaml", "docutils>=0.15", "sphinx>=2,<3", "sphinx-tabs"],
         "code_style": ["flake8<3.8.0,>=3.7.0", "black", "pre-commit==1.17.0"],
         "testing": [
             "coverage",