diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..fa6fc58
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "contrib/shunit2"]
+	path = contrib/shunit2
+	url = https://github.com/kward/shunit2/
diff --git a/contrib/shunit2 b/contrib/shunit2
new file mode 160000
index 0000000..ebc4baa
--- /dev/null
+++ b/contrib/shunit2
@@ -0,0 +1 @@
+Subproject commit ebc4baa08f045b7ef0f45c4b7d6f34f08d732f3d