# Dataset viewer doesn't work if split != "train" **URL:** \ **Category:** 🤗Datasets\ **Created:** [September 26, 2025, 10:27pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712 "2025-09-26T22:27:22Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![roemmele](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/roemmele/32/54309_2.png) [@roemmele](https://discuss.huggingface.co/u/roemmele)\ **Post date:** [September 26, 2025, 10:27pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/1 "2025-09-26T22:27:22Z")
I’m trying to upload a dataset to the hub. My dataset consists of an test set only, there’s no training set. However, when I try to specify a split name other than “train” in the dataset card (e.g. “test”), I get the error “The dataset viewer is not available for this split.”: ![Screenshot 2025-09-26 at 3.06.11 PM](https://us1.discourse-cdn.com/hellohellohello/original/3X/1/0/10b485bac94c1f1662e6f4d6ab4a539acb5a2dbe.png) ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [September 26, 2025, 10:36pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/2 "2025-09-26T22:36:10Z")
The `YAML` section at the top of `README.md` serves as the configuration file, so [configuring it there might make it work](https://huggingface.co/docs/hub/en/datasets-manual-configuration). ---
**Author:** ![roemmele](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/roemmele/32/54309_2.png) [@roemmele](https://discuss.huggingface.co/u/roemmele)\ **Post date:** [September 26, 2025, 11:31pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/3 "2025-09-26T23:31:55Z")
Thanks for the reply! As far as I can tell, I am following the documentation in the page you linked. Here’s the dataset page: [roemmele/SceneIllustrations · Datasets at Hugging Face](https://huggingface.co/datasets/roemmele/SceneIllustrations). In the metadata section of README.md, I’m specifying “name: test” under “splits”. I don’t have anything in the metadata referencing “train”, so “train” should not be expected as a data split. ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [September 27, 2025, 2:11am UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/4 "2025-09-27T02:11:04Z")
Hmm… This part? ```yaml --- dataset_info: features: - name: id dtype: string - name: phase dtype: int64 - name: story dtype: string - name: position dtype: int64 - name: fragment dtype: string - name: fragment_id dtype: string - name: illustration1 dtype: image - name: illustration2 dtype: image - name: annotator_selections sequence: string # was: list: string ← fix ... ... --- ``` Or simply [removing config for features](https://huggingface.co/docs/datasets/main/en/repository_structure): ```yaml --- license: cc-by-nc-sa-4.0 language: en task_categories: - text-to-image pretty_name: SceneIllustrations configs: - config_name: default data_files: - split: test path: "data/data_chunk_*.parquet" # use the real extension: .parquet / .jsonl / .csv --- ``` ---
**Author:** ![roemmele](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/roemmele/32/54309_2.png) [@roemmele](https://discuss.huggingface.co/u/roemmele)\ **Post date:** [September 29, 2025, 6:03pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/5 "2025-09-29T18:03:52Z")
Yes, this is the part that references the “test” split: ```auto splits: - name: test num_bytes: 6633552671 num_examples: 2990 configs: - config_name: default data_files: - split: test path: data/data_chunk_* ``` ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [September 29, 2025, 9:30pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/6 "2025-09-29T21:30:16Z")
Seems path is slightly wrong. Try this also. ```yaml splits: - name: test num_bytes: 6633552671 num_examples: 2990 configs: - config_name: default data_files: - split: test path: - data_chunk_*.parquet - data/data_chunk_*.parquet ``` ---
**Author:** ![roemmele](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/roemmele/32/54309_2.png) [@roemmele](https://discuss.huggingface.co/u/roemmele)\ **Post date:** [September 30, 2025, 6:14pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/7 "2025-09-30T18:14:32Z")
Ah, thanks for pointing out the issue with the path. I’ve fixed that, but still getting the same “Bad split” error. ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [September 30, 2025, 8:39pm UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/8 "2025-09-30T20:39:45Z")
DatasetViewer GUI doesn’t seem to work unless a `train` split exists (even a dummy one). This should make it work. Also, if `list` don’t work in `Features`, try using `sequence`. ```yaml splits: - name: train num_examples: 2990 num_bytes: 6633552671 - name: test num_examples: 2990 num_bytes: 6633552671 configs: - config_name: default data_files: - split: train path: data_chunk_*.parquet - split: test path: data_chunk_*.parquet ``` ---
**Author:** ![roemmele](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/roemmele/32/54309_2.png) [@roemmele](https://discuss.huggingface.co/u/roemmele)\ **Post date:** [October 1, 2025, 1:13am UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/9 "2025-10-01T01:13:41Z")
Thanks, but even with that config, the dataset viewer still fails to display the `test`split (same “bad split” error). I’m thinking this is an issue that should be addressed in a future code update to the dataset viewer - do you know where to file this issue? ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [October 1, 2025, 1:18am UTC](https://discuss.huggingface.co/t/dataset-viewer-doesnt-work-if-split-train/168712/10 "2025-10-01T01:18:16Z")
> the dataset viewer still fails to display the `test`split (same “bad split” error) Seems so… > do you know where to file this issue? [Here](https://github.com/huggingface/dataset-viewer/issues).