diff --git a/examples/acceptance_tests/009/aiken.toml b/examples/acceptance_tests/009/aiken.toml
new file mode 100644
index 00000000..575d56fb
--- /dev/null
+++ b/examples/acceptance_tests/009/aiken.toml
@@ -0,0 +1,2 @@
+name = "acceptance_test_009"
+version = "0.0.0"
diff --git a/examples/acceptance_tests/009/lib/test.ak b/examples/acceptance_tests/009/lib/test.ak
new file mode 100644
index 00000000..b4ef2b0d
--- /dev/null
+++ b/examples/acceptance_tests/009/lib/test.ak
@@ -0,0 +1,9 @@
+use aiken/builtin.{length_of_bytearray}
+
+pub fn is_empty(bytes: ByteArray) -> Bool {
+  length_of_bytearray(bytes) == 0
+}
+
+test is_empty_1() {
+  is_empty(#[]) == True
+}