diff --git a/test/_env/srv/cache.cds b/test/_env/srv/cache.cds
index 64c5651..ba69df4 100644
--- a/test/_env/srv/cache.cds
+++ b/test/_env/srv/cache.cds
@@ -6,4 +6,9 @@ using test from './main';
 service CacheService {
 
     entity Header as projection on test.Header;
+
+    entity HeaderMore as projection on Header {
+        *,
+        virtual null as dueAt: Date
+    }
 }
\ No newline at end of file
diff --git a/test/cache.test.js b/test/cache.test.js
index b3df2f0..ec356b4 100644
--- a/test/cache.test.js
+++ b/test/cache.test.js
@@ -22,4 +22,23 @@ describe("rest", () => {
     expect(response.body).toBeDefined();
     expect(response.text).toMatchSnapshot();
   });
+
+  it("GET Entity cache via prototype works", async () => {
+    let response = await util.callWrite(request, "/odata/v2/cache/Header", {
+      name: "Test"
+    }, false, {
+      accept: "application/xml",
+    });
+    expect(response.status).toBe(201)
+    expect(response.body).toBeDefined();
+
+    response = await util.callWrite(request, "/odata/v2/cache/HeaderMore", {
+      name: "Test",
+      dueAt: "/Date(1711152000000)/"
+    }, false, {
+      accept: "application/xml",
+    });
+    expect(response.status).toBe(201)
+    expect(response.body).toBeDefined();
+  });
 });