diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ea9e094
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "scripts/tests/bats"]
+	path = scripts/tests/bats
+	url = https://github.com/bats-core/bats-core.git
+[submodule "scripts/tests/test_helper/bats-assert"]
+	path = scripts/tests/test_helper/bats-assert
+	url = https://github.com/bats-core/bats-assert.git
+[submodule "scripts/tests/test_helper/bats-support"]
+	path = scripts/tests/test_helper/bats-support
+	url = https://github.com/bats-core/bats-support.git
diff --git a/scripts/tests/bats b/scripts/tests/bats
new file mode 160000
index 0000000..ce5ca28
--- /dev/null
+++ b/scripts/tests/bats
@@ -0,0 +1 @@
+Subproject commit ce5ca2802fabe5dc38393240cd40e20f8928d3b0
diff --git a/scripts/tests/test_helper/bats-assert b/scripts/tests/test_helper/bats-assert
new file mode 160000
index 0000000..e0de84e
--- /dev/null
+++ b/scripts/tests/test_helper/bats-assert
@@ -0,0 +1 @@
+Subproject commit e0de84e9c011223e7f88b7ccf1c929f4327097ba
diff --git a/scripts/tests/test_helper/bats-support b/scripts/tests/test_helper/bats-support
new file mode 160000
index 0000000..d140a65
--- /dev/null
+++ b/scripts/tests/test_helper/bats-support
@@ -0,0 +1 @@
+Subproject commit d140a65044b2d6810381935ae7f0c94c7023c8c3