message: [tf.data] Changing number of shards for `map_test` to be a prime number to improve load-balancing across shards.
diff: @@ -474,7 +474,7 @@ tf_py_test(
  name = "map_test",
  size = "small",
  srcs = ["map_test.py"],
  - shard_count = 16,
  + shard_count = 19,
  tags = ["notsan"], # TODO(b/183962015)
  deps = [
  ":checkpoint_test_base",
  