diff --git a/docs/source/tutorial/6-workflow.ipynb b/docs/source/tutorial/6-workflow.ipynb
index 73e61afac..8ace36945 100644
--- a/docs/source/tutorial/6-workflow.ipynb
+++ b/docs/source/tutorial/6-workflow.ipynb
@@ -481,7 +481,7 @@
     "from pathlib import Path\n",
     "import numpy as np\n",
     "from fileformats.medimage import Nifti1\n",
-    "import fileformats.medimage_mrtrix3 as mrtrix3\n",
+    "import fileformats.vendor.mrtrix3.medimage as mrtrix3\n",
     "from pydra.environments import docker\n",
     "from pydra.compose import workflow, python\n",
     "from pydra.tasks.mrtrix3.v3_0 import MrConvert, MrThreshold\n",
diff --git a/pydra/environments/docker.py b/pydra/environments/docker.py
index 3c6da919a..2ef7d09d1 100644
--- a/pydra/environments/docker.py
+++ b/pydra/environments/docker.py
@@ -37,7 +37,7 @@ def execute(self, job: "Job[shell.Task]") -> dict[str, ty.Any]:
         output = dict(zip(keys, values))
         if output["return_code"]:
             if output["stderr"]:
-                raise RuntimeError(output["stderr"])
+                raise RuntimeError(output["stdout"] + "\n" + output["stderr"])
             else:
                 raise RuntimeError(output["stdout"])
         return output