diff --git a/t/cypress/integration/t/mockData.ts b/t/cypress/integration/t/mockData.ts
index cdc1c08ec5..5ca38a9999 100644
--- a/t/cypress/integration/t/mockData.ts
+++ b/t/cypress/integration/t/mockData.ts
@@ -12,6 +12,7 @@ describe("Generate Random Patron", () => {
             values: { surname: "test_surname" },
         }).then(mockPatron => {
             expect(mockPatron.surname).to.equal("test_surname");
+            expect(mockPatron.overdues_count).to.be.a("number");
         });
     });
 });
diff --git a/t/cypress/plugins/mockData.js b/t/cypress/plugins/mockData.js
index 02ec1a7aba..855a55ba69 100644
--- a/t/cypress/plugins/mockData.js
+++ b/t/cypress/plugins/mockData.js
@@ -10,6 +10,9 @@ const objects = {
     },
 };
 const generateMockData = type => {
+    if (Array.isArray(type)) {
+        type = type.filter(t => t != '"null"')[0];
+    }
     switch (type) {
         case "string":
             return faker.lorem.words(3);