diff --git a/t/cypress/integration/t/mockData.ts b/t/cypress/integration/t/mockData.ts
index 1d6d21df0a..33b20279c6 100644
--- a/t/cypress/integration/t/mockData.ts
+++ b/t/cypress/integration/t/mockData.ts
@@ -20,6 +20,16 @@ describe("Generate Random Patron", () => {
             );
         });
     });
+
+    it("should not overwrite _id if passed", () => {
+        const home_library_id = "LIB4TEST";
+        cy.task("buildSampleObject", {
+            object: "item",
+            values: { home_library_id },
+        }).then(mockItem => {
+            expect(mockItem.home_library_id).to.equal(home_library_id);
+        });
+    });
 });
 
 describe("Generate Random Patrons", () => {
diff --git a/t/cypress/plugins/mockData.js b/t/cypress/plugins/mockData.js
index 0f9c292df8..c2025abeeb 100644
--- a/t/cypress/plugins/mockData.js
+++ b/t/cypress/plugins/mockData.js
@@ -74,7 +74,10 @@ const generateDataFromSchema = (properties, values = {}) => {
     });
 
     Object.keys(ids).forEach(k => {
-        if (mockData.hasOwnProperty(k + "_id")) {
+        if (
+            mockData.hasOwnProperty(k + "_id") &&
+            !values.hasOwnProperty(k + "_id")
+        ) {
             mockData[k + "_id"] = ids[k];
         }
     });