diff --git a/packages/shared/src/url.test.ts b/packages/shared/src/url.test.ts
index 5fb495d609..c10779d610 100644
--- a/packages/shared/src/url.test.ts
+++ b/packages/shared/src/url.test.ts
@@ -12,6 +12,10 @@ describe("isSafeExternalUrl", () => {
     expect(isSafeExternalUrl(url)).toBe(true);
   });
 
+  it("allows HTTPS URLs with an explicit port", () => {
+    expect(isSafeExternalUrl("https://example.com:8443/path")).toBe(true);
+  });
+
   it.each([
     "javascript:alert(1)",
     "file:///etc/passwd",