message: Only run GPU version of memory_optimizer_test.
diff: @@ -3,6 +3,7 @@ licenses(["notice"]) # Apache 2.0
  load("//tensorflow:tensorflow.bzl", "tf_cc_test")
  load("//tensorflow:tensorflow.bzl", "tf_cuda_cc_test")
  load("//tensorflow:tensorflow.bzl", "tf_kernel_library")
  +load("//tensorflow:tensorflow.bzl", "tf_cuda_only_cc_test")
  load("@local_config_cuda//cuda:build_defs.bzl", "if_cuda")
  # Platform specific build config
  @@ -422,7 +423,7 @@ cc_library(
  ]),
  )
  -tf_cuda_cc_test(
  +tf_cuda_only_cc_test(
  name = "memory_optimizer_test",
  srcs = ["memory_optimizer_test.cc"],
  tags = ["no_cuda_on_cpu_tap"], # Do not re-enable again without actually testing.
  