diff --git a/.gitmodules b/.gitmodules
index 9dd8513be..2c1739709 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,6 @@
 [submodule "test/repos/backbone"]
 	path = test/repos/backbone
 	url = https://github.com/jashkenas/backbone
+[submodule "tools/semantic-git-diff/test/corpus/repos/javascript"]
+	path = tools/semantic-git-diff/test/corpus/repos/javascript
+	url = https://github.com/rewinfrey/javascript.git/.git