diff --git a/src/browser/tests/net/fetch.html b/src/browser/tests/net/fetch.html
index a8159959..2d8c6266 100644
--- a/src/browser/tests/net/fetch.html
+++ b/src/browser/tests/net/fetch.html
@@ -35,7 +35,9 @@
 
     const json = await response.json();
     testing.expectEqual('9000!!!', json.over);
-
+    testing.expectEqual("number", typeof json.updated_at);
+    testing.expectEqual(1765867200000, json.updated_at);
+    testing.expectEqual({over: '9000!!!',updated_at:1765867200000}, json);
   });
 </script>
 
diff --git a/src/browser/tests/net/xhr.html b/src/browser/tests/net/xhr.html
index 82e9b6d1..dbb55653 100644
--- a/src/browser/tests/net/xhr.html
+++ b/src/browser/tests/net/xhr.html
@@ -75,6 +75,9 @@
     testing.expectEqual(200, req3.status);
     testing.expectEqual('OK', req3.statusText);
     testing.expectEqual('9000!!!', req3.response.over);
+    testing.expectEqual("number", typeof json.updated_at);
+    testing.expectEqual(1765867200000, json.updated_at);
+    testing.expectEqual({over: '9000!!!',updated_at:1765867200000}, json);
   });
 </script>
 
diff --git a/src/testing.zig b/src/testing.zig
index cd615aaf..3bc24a8e 100644
--- a/src/testing.zig
+++ b/src/testing.zig
@@ -516,7 +516,7 @@ fn testHTTPHandler(req: *std.http.Server.Request) !void {
     }
 
     if (std.mem.eql(u8, path, "/xhr/json")) {
-        return req.respond("{\"over\":\"9000!!!\"}", .{
+        return req.respond("{\"over\":\"9000!!!\",\"updated_at\":1765867200000}", .{
             .extra_headers = &.{
                 .{ .name = "Content-Type", .value = "application/json" },
             },