diff --git a/.gitmodules b/.gitmodules
index 873148628..9024f3b39 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "third_party/simpleini"]
 	path = third_party/simpleini
 	url = https://github.com/aseprite/simpleini.git
+[submodule "third_party/gtest"]
+	path = third_party/gtest
+	url = https://github.com/aseprite/gtest.git
diff --git a/third_party/gtest b/third_party/gtest
new file mode 160000
index 000000000..d63c625e7
--- /dev/null
+++ b/third_party/gtest
@@ -0,0 +1 @@
+Subproject commit d63c625e7f83ca990be83eb90776a67a6515da81