diff --git a/podaac/subsetter/gpm_cleanup.py b/podaac/subsetter/gpm_cleanup.py
index 0ec09efa..11e49667 100644
--- a/podaac/subsetter/gpm_cleanup.py
+++ b/podaac/subsetter/gpm_cleanup.py
@@ -24,7 +24,7 @@ def compute_new_time_data(time_group, nc_dataset):
         hour=nc_dataset[time_group+'__Hour'][:][i],
         minute=nc_dataset[time_group+'__Minute'][:][i],
         second=nc_dataset[time_group+'__Second'][:][i],
-        microsecond=nc_dataset[time_group+'__Second'][:][i]*1000),
+        microsecond=nc_dataset[time_group+'__MilliSecond'][:][i]*1000),
         time_unit_out) for i in range(len(nc_dataset[time_group+'__Year'][:]))]
 
     return new_time_list, time_unit_out
diff --git a/podaac/subsetter/subset.py b/podaac/subsetter/subset.py
index 83864585..ee7ba7a0 100644
--- a/podaac/subsetter/subset.py
+++ b/podaac/subsetter/subset.py
@@ -1226,6 +1226,9 @@ def subset(file_to_subset: str, bbox: np.ndarray, output_file: str,
             except AttributeError:
                 pass
 
+    if hdf_type == 'GPM':
+        args['decode_times'] = False
+
     with xr.open_dataset(
             xr.backends.NetCDF4DataStore(nc_dataset),
             **args
diff --git a/tests/data/GPM/GPM_test_file_2.HDF5 b/tests/data/GPM/GPM_test_file_2.HDF5
new file mode 100644
index 00000000..0ae6fbcb
Binary files /dev/null and b/tests/data/GPM/GPM_test_file_2.HDF5 differ
diff --git a/tests/data/GPM/GPM_test_file_3.HDF5 b/tests/data/GPM/GPM_test_file_3.HDF5
deleted file mode 100644
index b142ec86..00000000
Binary files a/tests/data/GPM/GPM_test_file_3.HDF5 and /dev/null differ
diff --git a/tests/test_subset.py b/tests/test_subset.py
index e1485e0b..4141d3ea 100644
--- a/tests/test_subset.py
+++ b/tests/test_subset.py
@@ -2315,7 +2315,7 @@ def test_gpm_compute_new_var_data(data_dir, subset_output_dir, request):
     since 1980-01-06"""
     
     gpm_dir = join(data_dir, 'GPM')
-    gpm_file = 'GPM_test_file_3.HDF5'
+    gpm_file = 'GPM_test_file_2.HDF5'
     bbox = np.array(((-180, 180), (-90, 90)))
     shutil.copyfile(
         os.path.join(gpm_dir, gpm_file),
@@ -2324,7 +2324,9 @@ def test_gpm_compute_new_var_data(data_dir, subset_output_dir, request):
 
     nc_dataset, has_groups, file_extension = subset.open_as_nc_dataset(join(subset_output_dir, gpm_file))
 
+    del nc_dataset.variables["__FS__ScanTime__timeMidScan"]
+    del nc_dataset.variables["__HS__ScanTime__timeMidScan"]
 
-    time_data, time_unit = gc.compute_new_time_data("__FS__ScanTime", nc_dataset)
+    nc_dataset = gc.change_var_dims(nc_dataset, variables=None)
 
-    assert int(time_data[0]) == 1325120552
+    assert int(nc_dataset["__FS__ScanTime__timeMidScan"][:][0]) == 1306403820