diff --git a/rustler_tests/test/test_helper.exs b/rustler_tests/test/test_helper.exs
index 500567d9..9ae71039 100644
--- a/rustler_tests/test/test_helper.exs
+++ b/rustler_tests/test/test_helper.exs
@@ -1,3 +1,6 @@
+# Raise an error if RustlerTest can't be loaded
+Code.ensure_loaded!(RustlerTest)
+
 ExUnit.start()
 
 defmodule SerdeRustlerTests.Helpers do