diff --git a/packages/mock/src/faker/getters/combine.ts b/packages/mock/src/faker/getters/combine.ts
index 06169bc09..7461765a4 100644
--- a/packages/mock/src/faker/getters/combine.ts
+++ b/packages/mock/src/faker/getters/combine.ts
@@ -103,9 +103,9 @@ export const combineSchemasMock = ({
     let currentValue = resolvedValue.value;
 
     if (itemResolvedValue?.value && separator === 'oneOf') {
-      currentValue = `${resolvedValue.value.slice(0, -1)},${
-        itemResolvedValue.value
-      }}`;
+      const splitValues = resolvedValue.value.split('},{');
+      const joined = splitValues.join(`,${itemResolvedValue.value}},{`);
+      currentValue = `${joined.slice(0, -1)},${itemResolvedValue.value}}`;
     }
 
     if (itemResolvedValue?.value && separator !== 'oneOf' && isLastElement) {