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..831bc03
--- /dev/null
+++ b/googletest
@@ -0,0 +1 @@
+Subproject commit 831bc03504b0946929bb05dcb323e3b2dc3d2bd5