diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5d403cd
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sass-spec"]
+	path = sass-spec
+	url = https://github.com/sass/sass-spec
diff --git a/sass-spec b/sass-spec
new file mode 160000
index 0000000..aa4f016
--- /dev/null
+++ b/sass-spec
@@ -0,0 +1 @@
+Subproject commit aa4f016b03a04684812bc80ccd221dcbf57f86e8