diff --git a/tests/unit/test_ecephys.py b/tests/unit/test_ecephys.py
index 6f76a5e8c..7abf444aa 100644
--- a/tests/unit/test_ecephys.py
+++ b/tests/unit/test_ecephys.py
@@ -18,6 +18,7 @@
 from pynwb.device import Device
 from pynwb.file import ElectrodeTable
 from pynwb.testing import TestCase
+from pynwb.testing.mock.ecephys import mock_ElectricalSeries
 
 from hdmf.common import DynamicTableRegion
 
@@ -116,6 +117,24 @@ def test_dimensions_warning(self):
                    ) in str(w[-1].message)
 
 
+def test_get_data_in_units():
+
+    data = np.asarray([[1, 1, 1, 1, 1], [1, 1, 1, 1, 1]])
+    conversion = 1.0
+    offset = 3.0
+    channel_conversion = np.asarray([2.0, 2.0])
+    electrical_series = mock_ElectricalSeries(
+        data=data,
+        conversion=conversion,
+        offset=offset,
+        channel_conversion=channel_conversion,
+    )
+
+    data_in_units = electrical_series.get_data_in_units()
+    expected_data =  data * conversion * channel_conversion[:, np.newaxis] + offset
+
+    np.testing.assert_almost_equal(data_in_units, expected_data)
+
 class SpikeEventSeriesConstructor(TestCase):
 
     def _create_table_and_region(self):