diff --git a/tests/notebooks/ipynb_py/The flavors of raw cells.ipynb b/tests/notebooks/ipynb_py/The flavors of raw cells.ipynb
new file mode 100644
index 000000000..9576c5a5d
--- /dev/null
+++ b/tests/notebooks/ipynb_py/The flavors of raw cells.ipynb	
@@ -0,0 +1,78 @@
+{
+ "cells": [
+  {
+   "cell_type": "raw",
+   "metadata": {
+    "raw_mimetype": "text/latex"
+   },
+   "source": [
+    "$1+1$"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "metadata": {
+    "raw_mimetype": "text/restructuredtext"
+   },
+   "source": [
+    ":math:`1+1`"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "metadata": {
+    "raw_mimetype": "text/html"
+   },
+   "source": [
+    "<b>Bold text<b>"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "metadata": {
+    "raw_mimetype": "text/markdown"
+   },
+   "source": [
+    "**Bold text**"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "metadata": {
+    "raw_mimetype": "text/x-python"
+   },
+   "source": [
+    "1 + 1"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "metadata": {},
+   "source": [
+    "Not formatted"
+   ]
+  }
+ ],
+ "metadata": {
+  "celltoolbar": "Format de la Cellule Texte Brut",
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/tests/notebooks/mirror/ipynb_to_Rmd/The flavors of raw cells.Rmd b/tests/notebooks/mirror/ipynb_to_Rmd/The flavors of raw cells.Rmd
new file mode 100644
index 000000000..767380a3d
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_Rmd/The flavors of raw cells.Rmd	
@@ -0,0 +1,31 @@
+---
+jupyter:
+  kernelspec:
+    display_name: Python 3
+    language: python
+    name: python3
+---
+
+```{python raw_mimetype=text/latex, active="", eval=FALSE}
+$1+1$
+```
+
+```{python raw_mimetype=text/restructuredtext, active="", eval=FALSE}
+:math:`1+1`
+```
+
+```{python raw_mimetype=text/html, active="", eval=FALSE}
+<b>Bold text<b>
+```
+
+```{python raw_mimetype=text/markdown, active="", eval=FALSE}
+**Bold text**
+```
+
+```{python raw_mimetype=text/x-python, active="", eval=FALSE}
+1 + 1
+```
+
+```{python active="", eval=FALSE}
+Not formatted
+```
diff --git a/tests/notebooks/mirror/ipynb_to_hydrogen/The flavors of raw cells.py b/tests/notebooks/mirror/ipynb_to_hydrogen/The flavors of raw cells.py
new file mode 100644
index 000000000..bce9226ad
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_hydrogen/The flavors of raw cells.py	
@@ -0,0 +1,25 @@
+# ---
+# jupyter:
+#   kernelspec:
+#     display_name: Python 3
+#     language: python
+#     name: python3
+# ---
+
+# %% [raw] {"raw_mimetype": "text/latex"}
+# $1+1$
+
+# %% [raw] {"raw_mimetype": "text/restructuredtext"}
+# :math:`1+1`
+
+# %% [raw] {"raw_mimetype": "text/html"}
+# <b>Bold text<b>
+
+# %% [raw] {"raw_mimetype": "text/markdown"}
+# **Bold text**
+
+# %% [raw] {"raw_mimetype": "text/x-python"}
+# 1 + 1
+
+# %% [raw]
+# Not formatted
diff --git a/tests/notebooks/mirror/ipynb_to_md/The flavors of raw cells.md b/tests/notebooks/mirror/ipynb_to_md/The flavors of raw cells.md
new file mode 100644
index 000000000..137aa8ce4
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_md/The flavors of raw cells.md	
@@ -0,0 +1,31 @@
+---
+jupyter:
+  kernelspec:
+    display_name: Python 3
+    language: python
+    name: python3
+---
+
+```raw_mimetype="text/latex"
+$1+1$
+```
+
+```raw_mimetype="text/restructuredtext"
+:math:`1+1`
+```
+
+```raw_mimetype="text/html"
+<b>Bold text<b>
+```
+
+```raw_mimetype="text/markdown"
+**Bold text**
+```
+
+```raw_mimetype="text/x-python"
+1 + 1
+```
+
+```
+Not formatted
+```
diff --git a/tests/notebooks/mirror/ipynb_to_percent/The flavors of raw cells.py b/tests/notebooks/mirror/ipynb_to_percent/The flavors of raw cells.py
new file mode 100644
index 000000000..bce9226ad
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_percent/The flavors of raw cells.py	
@@ -0,0 +1,25 @@
+# ---
+# jupyter:
+#   kernelspec:
+#     display_name: Python 3
+#     language: python
+#     name: python3
+# ---
+
+# %% [raw] {"raw_mimetype": "text/latex"}
+# $1+1$
+
+# %% [raw] {"raw_mimetype": "text/restructuredtext"}
+# :math:`1+1`
+
+# %% [raw] {"raw_mimetype": "text/html"}
+# <b>Bold text<b>
+
+# %% [raw] {"raw_mimetype": "text/markdown"}
+# **Bold text**
+
+# %% [raw] {"raw_mimetype": "text/x-python"}
+# 1 + 1
+
+# %% [raw]
+# Not formatted
diff --git a/tests/notebooks/mirror/ipynb_to_script/The flavors of raw cells.py b/tests/notebooks/mirror/ipynb_to_script/The flavors of raw cells.py
new file mode 100644
index 000000000..33e748585
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_script/The flavors of raw cells.py	
@@ -0,0 +1,25 @@
+# ---
+# jupyter:
+#   kernelspec:
+#     display_name: Python 3
+#     language: python
+#     name: python3
+# ---
+
+# + {"raw_mimetype": "text/latex", "active": ""}
+# $1+1$
+
+# + {"raw_mimetype": "text/restructuredtext", "active": ""}
+# :math:`1+1`
+
+# + {"raw_mimetype": "text/html", "active": ""}
+# <b>Bold text<b>
+
+# + {"raw_mimetype": "text/markdown", "active": ""}
+# **Bold text**
+
+# + {"raw_mimetype": "text/x-python", "active": ""}
+# 1 + 1
+
+# + {"active": ""}
+# Not formatted
diff --git a/tests/notebooks/mirror/ipynb_to_script_vim_folding_markers/The flavors of raw cells.py b/tests/notebooks/mirror/ipynb_to_script_vim_folding_markers/The flavors of raw cells.py
new file mode 100644
index 000000000..575fef2c7
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_script_vim_folding_markers/The flavors of raw cells.py	
@@ -0,0 +1,33 @@
+# ---
+# jupyter:
+#   jupytext:
+#     cell_markers: '{{{,}}}'
+#   kernelspec:
+#     display_name: Python 3
+#     language: python
+#     name: python3
+# ---
+
+# {{{ {"raw_mimetype": "text/latex", "active": ""}
+# $1+1$
+# }}}
+
+# {{{ {"raw_mimetype": "text/restructuredtext", "active": ""}
+# :math:`1+1`
+# }}}
+
+# {{{ {"raw_mimetype": "text/html", "active": ""}
+# <b>Bold text<b>
+# }}}
+
+# {{{ {"raw_mimetype": "text/markdown", "active": ""}
+# **Bold text**
+# }}}
+
+# {{{ {"raw_mimetype": "text/x-python", "active": ""}
+# 1 + 1
+# }}}
+
+# {{{ {"active": ""}
+# Not formatted
+# }}}
diff --git a/tests/notebooks/mirror/ipynb_to_script_vscode_folding_markers/The flavors of raw cells.py b/tests/notebooks/mirror/ipynb_to_script_vscode_folding_markers/The flavors of raw cells.py
new file mode 100644
index 000000000..2916fb319
--- /dev/null
+++ b/tests/notebooks/mirror/ipynb_to_script_vscode_folding_markers/The flavors of raw cells.py	
@@ -0,0 +1,33 @@
+# ---
+# jupyter:
+#   jupytext:
+#     cell_markers: region,endregion
+#   kernelspec:
+#     display_name: Python 3
+#     language: python
+#     name: python3
+# ---
+
+# region {"raw_mimetype": "text/latex", "active": ""}
+# $1+1$
+# endregion
+
+# region {"raw_mimetype": "text/restructuredtext", "active": ""}
+# :math:`1+1`
+# endregion
+
+# region {"raw_mimetype": "text/html", "active": ""}
+# <b>Bold text<b>
+# endregion
+
+# region {"raw_mimetype": "text/markdown", "active": ""}
+# **Bold text**
+# endregion
+
+# region {"raw_mimetype": "text/x-python", "active": ""}
+# 1 + 1
+# endregion
+
+# region {"active": ""}
+# Not formatted
+# endregion