diff --git a/.gitmodules b/.gitmodules
index cb1be0104..8ca2e9845 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "test/data"]
 	path = test/data
 	url = https://github.com/mapnik/test-data.git
+[submodule "test/data-visual"]
+	path = test/data-visual
+	url = https://github.com/mapnik/test-data-visual.git