diff --git a/tests/fixtures/sample-with-diagram.adoc b/tests/fixtures/sample-with-diagram.adoc
index f69d8063..7e0ce68e 100644
--- a/tests/fixtures/sample-with-diagram.adoc
+++ b/tests/fixtures/sample-with-diagram.adoc
@@ -251,3 +251,18 @@ A31117013206375A
 ....
 Hello World!
 ....
+
+=== TikZ
+https://tikz.net/
+
+[tikz]
+....
+\begin{tikzpicture}
+
+\draw (-2,0) -- (2,0);
+\filldraw [gray] (0,0) circle (2pt);
+\draw (-2,-2) .. controls (0,0) .. (2,-2);
+\draw (-2,2) .. controls (-1,0) and (1,0) .. (2,2);
+
+\end{tikzpicture}
+....