diff --git a/docs/introduction.rst b/docs/introduction.rst
index 9126eaf..0b1b8f4 100644
--- a/docs/introduction.rst
+++ b/docs/introduction.rst
@@ -11,3 +11,5 @@ exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
 dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
 Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt
 mollit anim id est laborum.
+
+TESTING: preview builds