diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..8cf8b5e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "googletest"]
+	path = googletest
+	url = https://github.com/google/googletest.git
diff --git a/googletest b/googletest
new file mode 160000
index 0000000..e5b88b2
--- /dev/null
+++ b/googletest
@@ -0,0 +1 @@
+Subproject commit e5b88b227e6adfa7196575b1264384e718d16cab