diff --git a/reg-tests/cache/if-modified-since.vtc b/reg-tests/cache/if-modified-since.vtc
index af8cbf0..e491e46 100644
--- a/reg-tests/cache/if-modified-since.vtc
+++ b/reg-tests/cache/if-modified-since.vtc
@@ -19,7 +19,8 @@
        rxreq
        expect req.url == "/date"
        txresp -nolen -hdr "Transfer-Encoding: chunked" \
-               -hdr "Date: Thu, 22 Oct 2020 16:51:12 GMT"
+               -hdr "Date: Thu, 22 Oct 2020 16:51:12 GMT" \
+               -hdr "Cache-Control: max-age=5"
        chunkedlen 16
        chunkedlen 16
        chunkedlen 16