diff --git a/tests/test_core/test_utils.py b/tests/test_core/test_utils.py
new file mode 100644
index 000000000..3e483819a
--- /dev/null
+++ b/tests/test_core/test_utils.py
@@ -0,0 +1,14 @@
+from __future__ import unicode_literals
+import sure
+
+from moto.core.utils import camelcase_to_underscores
+
+
+def test_camelcase_to_underscores():
+    cases = {
+        "theNewAttribute": "the_new_attribute",
+        "attri bute With Space": "attribute_with_space",
+        "FirstLetterCapital": "first_letter_capital",
+    }
+    for arg, expected in cases.items():
+        camelcase_to_underscores(arg).should.equal(expected)