diff --git a/icalendar_test.ts b/icalendar_test.ts
index cec9c10..c460ed6 100644
--- a/icalendar_test.ts
+++ b/icalendar_test.ts
@@ -243,3 +243,26 @@ Deno.test("expandRecurrences - object rrule with byday", () => {
   assertEquals(results[0].recurrent, true);
 });
 
+
+Deno.test("expandRecurrences - composite object rrule", () => {
+  const now = new Date();
+  const start = new Date(now.getTime() - 10 * 86400000); 
+  const startStr = localDateString(start);
+  const untilDate = new Date(now.getTime() + 10 * 86400000);
+
+  const icsEvent = {
+    summary: "Composite RRULE Event",
+    start: startStr,
+    rrule: { 
+      frequency: "WEEKLY", 
+      until: { date: untilDate },
+      byday: [{ day: "MO" }, { day: "WE" }, { day: "FR" }] 
+    } 
+  };
+  
+  const results = expandRecurrences(icsEvent, 30);
+  // Should successfully expand multiple days per week until the date
+  assert(results.length > 1);
+  assertEquals(results[0].recurrent, true);
+});
+