How to animate an element's "transform:rotate"?

Question

The following CSS should theoretically work in the newest Chrome build... strangely enough, the opacity is animated properly but transform:rotate is ignored. Can this not be transitioned?

@-webkit-keyframes offblink {
  0% {
    -webkit-transform: rotate(45deg);
    opacity: 0;
  }

  50% {
    -webkit-transform: rotate(180deg);
    opacity: 1;
  }

  100% {
    -webkit-transform: rotate(270deg);
    opacity: 0;
  }
}
.test {
  -webkit-animation-name: offblink;
  -webkit-animation-duration: 1s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: linear;
}

Answer 1

Solved. I had this test-case:

<div>anim only this: <span class="test">+</span></div>

Only worked with adding this:

.test { display: inline-block; }