diff --git a/.gitmodules b/.gitmodules
index 81c6b8e8..343e1358 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -30,3 +30,6 @@
 	path = third_party/google-toolbox-for-mac/google-toolbox-for-mac
 	url = https://github.com/google/google-toolbox-for-mac.git
 	branch = main
+[submodule "third_party/googletest"]
+	path = third_party/googletest
+	url = git@github.com:google/googletest.git
diff --git a/third_party/googletest b/third_party/googletest
new file mode 160000
index 00000000..733f8759
--- /dev/null
+++ b/third_party/googletest
@@ -0,0 +1 @@
+Subproject commit 733f875989a6fba05f4c366ea7b2ba4054994a7e