Empty weak etag is supposed to match?

[achingbrain]

This test sends an empty weak etag (which should not match anything) but expects a 304 back, so expects it to match:

Name: GET for /ipfs/ dir listing with matching weak ETA in If-None-Match returns 304 Not Modified

Error: Status code is not 304. It is 200

Expected Request:
"method": "GET",
"path": "/ipfs/bafybeib3ffl2teiqdncv3mkz4r23b5ctrwkzrrhctdbne6iboayxuxk5ui/root2/root3/",
"headers": {
  "If-None-Match": "W/\"\""
}

Actual Request:

GET /ipfs/bafybeib3ffl2teiqdncv3mkz4r23b5ctrwkzrrhctdbne6iboayxuxk5ui/root2/root3/ HTTP/1.1
Host: 127.0.0.1:3334
User-Agent: ipfs/gateway-conformance/dev
If-None-Match: W/""
Accept-Encoding: gzip

Expected Response:

{
  "statusCode": 304
}


Actual Response:

HTTP/1.1 200 OK
Content-Length: 53
Accept-Ranges: bytes
...

The test tries to send a CID but it seems to be empty - is this a bug?