diff --git a/.gitmodules b/.gitmodules
index a0ebf94..0825c9c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,9 @@
 [submodule "lib/nanopb"]
 	path = lib/nanopb
 	url = https://github.com/nanopb/nanopb.git
+[submodule "tests/lib/cmock"]
+	path = tests/lib/cmock
+	url = https://github.com/throwtheswitch/cmock.git
+[submodule "tests/lib/Unity"]
+	path = tests/lib/Unity
+	url = https://github.com/ThrowTheSwitch/Unity
diff --git a/tests/lib/Unity b/tests/lib/Unity
new file mode 160000
index 0000000..64939db
--- /dev/null
+++ b/tests/lib/Unity
@@ -0,0 +1 @@
+Subproject commit 64939db64e3271808fdfcfa348120b36790a23cf
diff --git a/tests/lib/cmock b/tests/lib/cmock
new file mode 160000
index 0000000..9192a95
--- /dev/null
+++ b/tests/lib/cmock
@@ -0,0 +1 @@
+Subproject commit 9192a950897929d948027421e30a372b1770469b