diff --git a/.gitignore b/.gitignore
index dc1d2fe..5467a52 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ banana_test
 *.a
 *.asm
 *.so
+build
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a27fde6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/googletest"]
+	path = lib/googletest
+	url = https://github.com/google/googletest
diff --git a/CMakeLists.txt b/CMakeLists.txt
index af51c87..b96df99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,12 +16,6 @@ target_link_libraries(banana -lffi banana_lib)
 add_executable(assembler src/assembler.cpp)
 target_link_libraries(assembler -lffi banana_lib)
 
+add_subdirectory(lib/googletest)
 add_executable(banana_test src/banana_test.cpp)
-target_link_libraries(banana_test -lffi banana_lib)
-
-# gtest
-include(FetchContent)
-FetchContent_Declare(googletest URL https://github.com/google/googletest/archive/5376968f6948923e2411081fd9372e71a59d8e77.zip)
-FetchContent_MakeAvailable(googletest)
-target_link_libraries(banana_test gtest_main)
-add_test(BananaTest banana_test)
+target_link_libraries(banana_test -lffi banana_lib gtest_main)
diff --git a/lib/googletest b/lib/googletest
new file mode 160000
index 0000000..8a6feab
--- /dev/null
+++ b/lib/googletest
@@ -0,0 +1 @@
+Subproject commit 8a6feabf04bec8fb125e0df0ad1195c42350725f
diff --git a/src/banana_test.cpp b/src/banana_test.cpp
index 43a7a8f..8e162e5 100644
--- a/src/banana_test.cpp
+++ b/src/banana_test.cpp
@@ -1,10 +1,10 @@
 #include <iostream>
 #include <sstream>
+#include <gtest/gtest.h>
 #include "lib/ast.h"
 #include "lib/scanner.h"
 #include "lib/parser.h"
 #include "lib/vm.h"
-#include "gtest/gtest.h"
 
 namespace {
 std::string exe(const std::string& code, const std::vector<std::string>& shared_libraries = std::vector<std::string>()) {