diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ae94f7b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "forth2012-test-suite"]
+	path = forth2012-test-suite
+	url = https://github.com/gerryjackson/forth2012-test-suite
diff --git a/forth2012-test-suite b/forth2012-test-suite
new file mode 160000
index 0000000..45b7ecc
--- /dev/null
+++ b/forth2012-test-suite
@@ -0,0 +1 @@
+Subproject commit 45b7ecc1e37d8fdd1bd9a29ec52a15bf7ac69d7f