diff --git a/reg-tests/cache/vary.vtc b/reg-tests/cache/vary.vtc
index 9690490..001018f 100644
--- a/reg-tests/cache/vary.vtc
+++ b/reg-tests/cache/vary.vtc
@@ -187,8 +187,9 @@
        expect resp.http.content-type == "text/plain"
        expect resp.http.X-Cache-Hit == 1
 
-       # The accept-encoding normalizer function sorts alphabeticaly the values
-       # before  calculating the secondary key
+       # The accept-encoding normalizer function converts the header values
+       # to lower case then calculates the hash of every sub part before
+       # sorting the hashes and xor'ing them (while removing duplicates).
        txreq -url "/accept-encoding-multiple" -hdr "Accept-Encoding: first,second"
        rxresp
        expect resp.status == 200
@@ -207,6 +208,12 @@
        expect resp.bodylen == 51
        expect resp.http.X-Cache-Hit == 1
 
+       txreq -url "/accept-encoding-multiple" -hdr "Accept-Encoding: FirsT,SECOND,first"
+       rxresp
+       expect resp.status == 200
+       expect resp.bodylen == 51
+       expect resp.http.X-Cache-Hit == 1
+
        # Unmanaged vary
        txreq -url "/unmanaged" -hdr "Accept-Encoding: first_value"
        rxresp
@@ -270,7 +277,7 @@
        expect resp.bodylen == 57
        expect resp.http.X-Cache-Hit == 1
 
-       # The following requests are trated by a backend that does not cache
+       # The following requests are treated by a backend that does not cache
        # responses containing a Vary header
        txreq -url "/no_vary_support"
        rxresp