diff --git a/Tests/Data/requirements.txt b/Tests/Data/requirements.txt
index d4b9c54c57fdf20bf140197f766b0b1f98e29d1b..e5c4eaf49cae2c59df0cd7fe6ed9705f1fc9dfb4 100644
--- a/Tests/Data/requirements.txt
+++ b/Tests/Data/requirements.txt
@@ -12,3 +12,4 @@ pyvista[all]>=0.40.1
 seaborn>=0.12
 VTUinterface>=0.704
 vtk-osmesa>=9.2.6;platform_system=='Linux'
+git+https://github.com/drufat/triangle@5210b64ac5f2aff5673a66938cae56dc0a93a4ff#egg=triangle;platform_system=='Darwin'