diff --git a/src/tests.ts b/src/tests.ts
index 9c4d37f..c29ce40 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -1,5 +1,9 @@
+import { expression } from "@thilawyn/traitify-ts"
+import { AbstractClass } from "type-fest"
 import { z } from "zod"
 import { ZodSchemaClass } from "./ZodSchemaClass"
+import { ExtendableZodSchemaObject } from "./lib"
+import { InstantiableZodSchemaObject } from "./traits/InstantiableZodSchemaObject"
 
 
 class Test extends ZodSchemaClass({
@@ -41,3 +45,19 @@ console.log(subInst)
 // class ChildTest extends Test {}
 
 // ChildTest.instantiate({ name: "" })
+
+
+class Gneugneu {
+}
+
+export function getExpression<C extends AbstractClass<object>>(class_: C) {
+    return expression
+        .extends(class_)
+        .expresses(
+            InstantiableZodSchemaObject,
+            ExtendableZodSchemaObject,
+        )
+        .build()
+}
+
+const exp = getExpression(Gneugneu)