diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b18fe2f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "bats_tests/test_helper/bats-assert"]
+	path = bats_tests/test_helper/bats-assert
+	url = https://github.com/ztombol/bats-assert
+[submodule "bats_tests/test_helper/bats-support"]
+	path = bats_tests/test_helper/bats-support
+	url = https://github.com/ztombol/bats-support
diff --git a/bats_tests/test_helper/bats-assert b/bats_tests/test_helper/bats-assert
new file mode 160000
index 0000000..9f88b42
--- /dev/null
+++ b/bats_tests/test_helper/bats-assert
@@ -0,0 +1 @@
+Subproject commit 9f88b4207da750093baabc4e3f41bf68f0dd3630
diff --git a/bats_tests/test_helper/bats-support b/bats_tests/test_helper/bats-support
new file mode 160000
index 0000000..d0a1318
--- /dev/null
+++ b/bats_tests/test_helper/bats-support
@@ -0,0 +1 @@
+Subproject commit d0a131831c487a1f1141e76d3ab386c89642cdff