diff --git a/src/ptbench/data/mc_ch_in_11k/fold_1_rgb.py b/src/ptbench/data/mc_ch_in_11k/fold_1_rgb.py
index 32a94a5d68567ab4361686ac11118330e0b911b0..1fdea4b18d3721053845cf0bf7c830cd2bf6fed6 100644
--- a/src/ptbench/data/mc_ch_in_11k/fold_1_rgb.py
+++ b/src/ptbench/data/mc_ch_in_11k/fold_1_rgb.py
@@ -2,7 +2,8 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-"""Aggregated dataset composed of Montgomery and Shenzhen datasets."""
+"""Aggregated dataset composed of Montgomery, Shenzhen, Indian and the default
+TBX11K-simplified datasets (cross validation fold 1, RGB)"""
 
 from clapper.logging import setup
 from torch.utils.data.dataset import ConcatDataset
@@ -12,6 +13,7 @@ from ..base_datamodule import BaseDataModule, get_dataset_from_module
 from ..indian.fold_1_rgb import datamodule as indian_datamodule
 from ..montgomery.fold_1_rgb import datamodule as mc_datamodule
 from ..shenzhen.fold_1_rgb import datamodule as ch_datamodule
+from ..tbx11k_simplified.fold_1_rgb import datamodule as tbx11k_datamodule
 
 logger = setup(__name__.split(".")[0], format="%(levelname)s: %(message)s")
 
@@ -51,23 +53,41 @@ class DefaultModule(BaseDataModule):
         indian = get_dataset_from_module(
             indian_datamodule, stage, **module_args
         )
+        tbx11k = get_dataset_from_module(
+            tbx11k_datamodule, stage, **module_args
+        )
 
         # Combine datasets
         self.dataset = {}
         self.dataset["__train__"] = ConcatDataset(
-            [mc["__train__"], ch["__train__"], indian["__train__"]]
+            [
+                mc["__train__"],
+                ch["__train__"],
+                indian["__train__"],
+                tbx11k["__train__"],
+            ]
         )
         self.dataset["train"] = ConcatDataset(
-            [mc["train"], ch["train"], indian["train"]]
+            [mc["train"], ch["train"], indian["train"], tbx11k["train"]]
         )
         self.dataset["__valid__"] = ConcatDataset(
-            [mc["__valid__"], ch["__valid__"], indian["__valid__"]]
+            [
+                mc["__valid__"],
+                ch["__valid__"],
+                indian["__valid__"],
+                tbx11k["__valid__"],
+            ]
         )
         self.dataset["validation"] = ConcatDataset(
-            [mc["validation"], ch["validation"], indian["validation"]]
+            [
+                mc["validation"],
+                ch["validation"],
+                indian["validation"],
+                tbx11k["validation"],
+            ]
         )
         self.dataset["test"] = ConcatDataset(
-            [mc["test"], ch["test"], indian["test"]]
+            [mc["test"], ch["test"], indian["test"], tbx11k["test"]]
         )
 
         (