diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62122888a..bd4dbfd05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - Add `NWBHDF5IO.can_read()`. @bendichter [#1703](https://github.com/NeurodataWithoutBorders/pynwb/pull/1703)
 - Add `pynwb.get_nwbfile_version()`. @bendichter [#1703](https://github.com/NeurodataWithoutBorders/pynwb/pull/1703)
 - Updated timeseries data checks to warn instead of error when reading invalid files. @stephprince [#1793](https://github.com/NeurodataWithoutBorders/pynwb/pull/1793)
+- Expose the offset, conversion and channel conversion parameters in `mock_ElectricalSeries`. @h-mayorquin [#1796](https://github.com/NeurodataWithoutBorders/pynwb/pull/1796)
 
 ## PyNWB 2.5.0 (August 18, 2023)
 
diff --git a/src/pynwb/testing/mock/ecephys.py b/src/pynwb/testing/mock/ecephys.py
index 888f19962..8afa9ebc3 100644
--- a/src/pynwb/testing/mock/ecephys.py
+++ b/src/pynwb/testing/mock/ecephys.py
@@ -73,7 +73,10 @@ def mock_ElectricalSeries(
     timestamps=None,
     electrodes: Optional[DynamicTableRegion] = None,
     filtering: str = "filtering",
-    nwbfile: Optional[NWBFile] = None
+    nwbfile: Optional[NWBFile] = None,
+    channel_conversion: Optional[np.ndarray] = None,
+    conversion: float = 1.0,
+    offset: float = 0.,
 ) -> ElectricalSeries:
     electrical_series = ElectricalSeries(
         name=name or name_generator("ElectricalSeries"),
@@ -83,6 +86,9 @@ def mock_ElectricalSeries(
         timestamps=timestamps,
         electrodes=electrodes or mock_electrodes(nwbfile=nwbfile),
         filtering=filtering,
+        conversion=conversion,
+        offset=offset,
+        channel_conversion=channel_conversion,
     )
 
     if nwbfile is not None: