message: Disabling CollectiveOpsTest.AllReduce_NcclChannelCaching as it's timing out on guitar.
diff: @@ -339,7 +339,10 @@ XLA_TEST_F(CollectiveOpsTest, AllReduce_AllCombinations) {
  // Check that the NCCL data structures in our all-reduce implementation are
  // cached as we expect.
  -XLA_TEST_F(CollectiveOpsTest, DISABLED_ON_CPU(AllReduce_NcclChannelCaching)) {
  +
  +// TODO(b/174588959): Re-enable this on GPU. Currently timing out on guitar.
  +XLA_TEST_F(CollectiveOpsTest,
  + DISABLED_ON_CPU(DISABLED_ON_GPU(AllReduce_NcclChannelCaching))) {
  const int64 kNumElems = 1024;
  std::vector<float> input_vec(kNumElems);
  