diff --git a/macros/tests/not_negative.sql b/macros/tests/not_negative.sql
new file mode 100644
index 0000000..4ac9523
--- /dev/null
+++ b/macros/tests/not_negative.sql
@@ -0,0 +1,6 @@
+{% test not_negative(model, column_name) %}
+    with validation as (select {{ column_name }} as value from {{ model }})
+    select *
+    from validation
+    where value < 0
+{% endtest %}