diff --git a/src/pynwb/ndx_microscopy/testing/_mock.py b/src/pynwb/ndx_microscopy/testing/_mock.py
index 1a0101c..5a8af90 100644
--- a/src/pynwb/ndx_microscopy/testing/_mock.py
+++ b/src/pynwb/ndx_microscopy/testing/_mock.py
@@ -118,8 +118,8 @@ def mock_VolumetricImagingSpace(
 
 def mock_MicroscopySegmentations(
     name: Optional[str] = None,
-    microscopy_plane_segmentations: Optional[Iterable[ndx_microscopy.PlaneSegmentation]] = None,
-) -> ndx_microscopy.MicroscopyImageSegmentation:
+    microscopy_plane_segmentations: Optional[Iterable[ndx_microscopy.MicroscopyPlaneSegmentation]] = None,
+) -> ndx_microscopy.MicroscopySegmentations:
     name = name or name_generator("MicroscopySegmentations")
     microscopy_plane_segmentations = microscopy_plane_segmentations or [mock_MicroscopyPlaneSegmentation()]