diff --git a/test/ui.presenter-next-run.test.ts b/test/ui.presenter-next-run.test.ts
index 12c2ed4d80d..49e1798c20d 100644
--- a/test/ui.presenter-next-run.test.ts
+++ b/test/ui.presenter-next-run.test.ts
@@ -10,7 +10,8 @@ describe("formatNextRun", () => {
   it("includes weekday and relative time", () => {
     const ts = Date.UTC(2026, 1, 23, 15, 0, 0);
     const out = formatNextRun(ts);
-    expect(out).toMatch(/^[A-Za-z]{3}, /);
+    const weekday = new Date(ts).toLocaleDateString(undefined, { weekday: "short" });
+    expect(out.slice(0, weekday.length + 2)).toBe(`${weekday}, `);
     expect(out).toContain("(");
     expect(out).toContain(")");
   });