diff --git a/src/lib/openapi/nested-schemas.test.ts b/src/lib/openapi/nested-schemas.test.ts
new file mode 100644
index 0000000000..dc6cebe228
--- /dev/null
+++ b/src/lib/openapi/nested-schemas.test.ts
@@ -0,0 +1,15 @@
+import { includeSchemasRecursively } from './nested-schemas';
+
+test('includeSchemasRecursively', () => {
+    const schemaFour = { components: {} };
+    const schemaThree = { components: { schemas: { schemaFour } } };
+    const schemaOne = {
+        components: { schemas: { schemaTwo: schemaFour, schemaThree } },
+    };
+    expect(includeSchemasRecursively({ schemaOne })).toEqual({
+        schemaOne,
+        schemaTwo: schemaFour,
+        schemaThree,
+        schemaFour,
+    });
+});