diff --git a/tests/syntax-tests/highlighted/CSV/comma_in_quotes.csv b/tests/syntax-tests/highlighted/CSV/comma_in_quotes.csv
new file mode 100644
index 00000000..2ad5b914
--- /dev/null
+++ b/tests/syntax-tests/highlighted/CSV/comma_in_quotes.csv
@@ -0,0 +1,7 @@
+[3;38;2;102;217;239mfirst[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239mlast[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239maddress[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239mcity[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239mzip[0m
+[3;38;2;102;217;239mJohn[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239mDoe[0m[38;2;249;38;114m,[0m[38;2;190;132;255m120[0m[38;2;248;248;242m [0m[3;38;2;102;217;239many[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mst.[0m[38;2;249;38;114m,[0m[38;2;230;219;116m"[0m[3;38;2;102;217;239mAnytown[0m[38;2;249;38;114m,[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mWW[0m[38;2;230;219;116m"[0m[38;2;249;38;114m,[0m[38;2;190;132;255m08123[0m
+[3;38;2;102;217;239ma[0m[38;2;249;38;114m,[0m[3;38;2;102;217;239mb[0m
+[38;2;190;132;255m1[0m[38;2;249;38;114m,[0m[38;2;230;219;116m"[0m[3;38;2;102;217;239mha[0m[38;2;248;248;242m [0m
+[38;2;230;219;116m"[0m[38;2;230;219;116m"[0m[3;38;2;102;217;239mha[0m[38;2;230;219;116m"[0m[38;2;230;219;116m"[0m[38;2;248;248;242m [0m
+[3;38;2;102;217;239mha[0m[38;2;230;219;116m"[0m[38;2;249;38;114m,[0m[38;2;190;132;255m120[0m[38;2;248;248;242m [0m[3;38;2;102;217;239many[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mst.[0m[38;2;249;38;114m,[0m[38;2;230;219;116m"[0m[3;38;2;102;217;239mAnytown[0m[38;2;249;38;114m,[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mWW[0m[38;2;230;219;116m"[0m[38;2;249;38;114m,[0m[38;2;190;132;255m08123[0m
+[38;2;190;132;255m3[0m[38;2;249;38;114m,[0m[38;2;190;132;255m4[0m[38;2;249;38;114m,[0m[38;2;190;132;255m120[0m[38;2;248;248;242m [0m[3;38;2;102;217;239many[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mst.[0m[38;2;249;38;114m,[0m[38;2;230;219;116m"[0m[3;38;2;102;217;239mAnytown[0m[38;2;249;38;114m,[0m[38;2;248;248;242m [0m[3;38;2;102;217;239mWW[0m[38;2;230;219;116m"[0m[38;2;249;38;114m,[0m[38;2;190;132;255m08123[0m
diff --git a/tests/syntax-tests/source/CSV/LICENSE.md b/tests/syntax-tests/source/CSV/LICENSE.md
new file mode 100644
index 00000000..5585cebf
--- /dev/null
+++ b/tests/syntax-tests/source/CSV/LICENSE.md
@@ -0,0 +1,27 @@
+The `comma_in_quotes.csv` file" has been added from https://github.com/maxogden/csv-spectrum under the following license:
+
+BSD 2-Clause License
+
+Copyright (c) [year], [fullname]
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/tests/syntax-tests/source/CSV/comma_in_quotes.csv b/tests/syntax-tests/source/CSV/comma_in_quotes.csv
new file mode 100644
index 00000000..499ae280
--- /dev/null
+++ b/tests/syntax-tests/source/CSV/comma_in_quotes.csv
@@ -0,0 +1,7 @@
+first,last,address,city,zip
+John,Doe,120 any st.,"Anytown, WW",08123
+a,b
+1,"ha 
+""ha"" 
+ha",120 any st.,"Anytown, WW",08123
+3,4,120 any st.,"Anytown, WW",08123