diff --git a/.gitmodules b/.gitmodules
index 51ab8750b..90a9b30ba 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "contrib/omtc/omtc"]
 	path = contrib/omtc/omtc
 	url = https://github.com/ianj-als/omtc.git
+[submodule "regtest"]
+	path = regtest
+	url = https://github.com/moses-smt/moses-regression-tests