diff --git a/src/eva/vision/data/datasets/segmentation/consep.py b/src/eva/vision/data/datasets/segmentation/consep.py
index 0edbb2a7b..1e7391545 100644
--- a/src/eva/vision/data/datasets/segmentation/consep.py
+++ b/src/eva/vision/data/datasets/segmentation/consep.py
@@ -108,7 +108,7 @@ def validate(self) -> None:
             n_classes=5,
             first_and_last_labels=((self.classes[0], self.classes[-1])),
         )
-        n_expected = self._expected_dataset_lengths[None]
+        n_expected = self._expected_dataset_lengths[self._split]
         if len(self._file_paths) != n_expected:
             raise ValueError(
                 f"Expected {n_expected} images, found {len(self._file_paths)} in {self._root}."
diff --git a/tools/consep/download_consep.sh b/tools/consep/download_consep.sh
new file mode 100755
index 000000000..b0af6a897
--- /dev/null
+++ b/tools/consep/download_consep.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# Usage: ./download_consep.sh /path/to/data
+# Requires ACCESS_KEY_ID and SECRET_ACCESS_KEY in environment variables
+
+set -e
+
+# Load .env if present in the script’s folder
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [[ -f "$SCRIPT_DIR/.env" ]]; then
+  export $(grep -v '^#' "$SCRIPT_DIR/.env" | xargs)
+fi
+
+ROOT=${1:-"./data"}
+DEST="$ROOT/consep"
+
+echo "[INFO] Preparing CoNSeP dataset under $DEST"
+mkdir -p "$DEST"
+
+# Ensure openxlab is installed
+pip show openxlab >/dev/null 2>&1 || pip install -U openxlab
+
+# Login non-interactively
+if [[ -z "$ACCESS_KEY_ID" || -z "$SECRET_ACCESS_KEY" ]]; then
+  echo "[ERROR] Please export ACCESS_KEY_ID and SECRET_ACCESS_KEY before running."
+  exit 1
+fi
+echo "[INFO] Logging into OpenXLab..."
+openxlab login --ak "$ACCESS_KEY_ID" --sk "$SECRET_ACCESS_KEY"
+
+# Download dataset
+echo "[INFO] Downloading CoNSeP dataset..."
+openxlab dataset get --dataset-repo OpenDataLab/CoNSeP --target-path "$DEST"
+
+# Unzip consep.zip into $DEST/tmp_extract
+ZIP_PATH="$DEST/OpenDataLab___CoNSeP/raw/consep.zip"
+if [[ ! -f "$ZIP_PATH" ]]; then
+  echo "[ERROR] Expected $ZIP_PATH not found."
+  exit 1
+fi
+
+TMP_EXTRACT="$DEST/tmp_extract"
+mkdir -p "$TMP_EXTRACT"
+echo "[INFO] Extracting $ZIP_PATH..."
+unzip -q "$ZIP_PATH" -d "$TMP_EXTRACT"
+
+# Move Test and Train directly under $DEST
+if [[ -d "$TMP_EXTRACT/CoNSEP" ]]; then
+  mv "$TMP_EXTRACT/CoNSEP/Test" "$DEST/"
+  mv "$TMP_EXTRACT/CoNSEP/Train" "$DEST/"
+else
+  echo "[ERROR] Unexpected structure inside zip."
+  exit 1
+fi
+
+# Move metafile.yaml and README.md to $DEST
+echo "[INFO] Organizing files..."
+mv "$DEST/OpenDataLab___CoNSeP/metafile.yaml" "$DEST/"
+mv "$DEST/OpenDataLab___CoNSeP/README.md" "$DEST/"
+
+# Cleanup
+rm -rf "$DEST/OpenDataLab___CoNSeP"
+rm -rf "$TMP_EXTRACT"
+
+echo "[INFO] Done. Final structure:"
+ls -R "$DEST"