UserInfo endpoint not accessible by POST request secured with Bearer header

The OIDC conformance testsuite has 3 tests for access UserInfo endpoint:
1) GET method with Bearer token in header
2) POST method with Bearer token in the body
3) POST method with Bearer token in header

We pass the 1 and 2, but we fail 3 right now.

Just for tracking OIDC specification sais this in http://openid.net/specs/openid-connect-core-1_0.html#UserInfo :

 The UserInfo Endpoint MUST support the use of the HTTP GET and HTTP POST methods defined in RFC 2616 [RFC2616].

The UserInfo Endpoint MUST accept Access Tokens as OAuth 2.0 Bearer Token Usage [RFC6750]. 

The RFC6750 indeed supports header for GET+POST or body for POST.