diff --git a/src/roboticstoolbox/mobile/Vehicle.py b/src/roboticstoolbox/mobile/Vehicle.py
index 4626ba94a..b9a8ef3b8 100644
--- a/src/roboticstoolbox/mobile/Vehicle.py
+++ b/src/roboticstoolbox/mobile/Vehicle.py
@@ -371,7 +371,7 @@ def control(self):
 
             >>> from roboticstoolbox import Bicycle, RandomPath
             >>> bike = Bicycle()
-            >>> bike.control = RandomPath(10)
+            >>> bike.control = RandomPath(workspace=10)
             >>> print(bike)
 
         :seealso: :meth:`run` :meth:`eval_control` :obj:`scipy.interpolate.interp1d` :class:`~roboticstoolbox.mobile.drivers.VehicleDriverBase`
diff --git a/src/roboticstoolbox/mobile/drivers.py b/src/roboticstoolbox/mobile/drivers.py
index 706694e1c..c4251d612 100644
--- a/src/roboticstoolbox/mobile/drivers.py
+++ b/src/roboticstoolbox/mobile/drivers.py
@@ -58,7 +58,13 @@ def __init__(
         [A, B, C, D]     A:B      C:D
         ==============  =======  =======
         """
-        if hasattr(workspace, "workspace"):
+        if workspace is None:
+            # spatialmath.base.expand_dims(None) raises TypeError despite
+            # None being its own advertised default (see tech-debt.md in
+            # the spatialmath-python repo) — treat "no workspace" as None
+            # rather than relying on that default.
+            self._workspace = None
+        elif hasattr(workspace, "workspace"):
             # workspace can be defined by an object with a workspace attribute
             self._workspace = base.expand_dims(workspace.workspace)
         else: