diff --git a/gnovm/tests/challenges/not_a_type.gno b/gnovm/tests/challenges/not_a_type.gno
new file mode 100644
index 00000000000..ed8adb9983a
--- /dev/null
+++ b/gnovm/tests/challenges/not_a_type.gno
@@ -0,0 +1,10 @@
+package main
+
+var T struct{}
+
+func (t T) do() {}
+
+func main() {}
+
+// Error:
+// T (variable of type struct{}) is not a type