diff --git a/python/lsst/ts/externalscripts/base_take_ptc_flats.py b/python/lsst/ts/externalscripts/base_take_ptc_flats.py
index b1ea0af37..9f47e3fe4 100644
--- a/python/lsst/ts/externalscripts/base_take_ptc_flats.py
+++ b/python/lsst/ts/externalscripts/base_take_ptc_flats.py
@@ -22,6 +22,7 @@
 
 import abc
 import asyncio
+import types
 
 import yaml
 from lsst.ts import salobj
@@ -257,21 +258,21 @@ async def configure_camera(self):
         """
         raise NotImplementedError()
 
-    async def configure_electrometer(self, elec_index):
+    async def configure_electrometer(self, index):
         """Configure the Electrometer remote object."""
         if self.electrometer is None:
             self.log.debug(
-                f"Configuring remote for Electrometer index: {elec_index}"
+                f"Configuring remote for Electrometer index: {index}"
             )
             self.electrometer = salobj.Remote(
-                self.domain, name="Electrometer", index=elec_index
+                self.domain, name="Electrometer", index=index
             )
             await self.electrometer.start_task
         else:
             self.log.debug("Electrometer already configured. Ignoring.")
 
     @classmethod
-    def get_schema(cls) -> dict:
+    def get_schema(cls):
         default_flats_exp_times_str = ", ".join(
             map(str, cls.DEFAULT_PTC_EXP_TIMES)
         )
@@ -323,8 +324,8 @@ def get_schema(cls) -> dict:
                     minimum: 1
                   mode:
                     description: >
-                      Electrometer measurement mode as a string. Valid options are
-                      "CURRENT" and "CHARGE".
+                      Electrometer measurement mode as a string. Valid options
+                      are "CURRENT" and "CHARGE".
                     type: string
                     enum: ["CURRENT", "CHARGE"]
                     default: "CURRENT"
@@ -358,7 +359,7 @@ def get_schema(cls) -> dict:
 
         return schema_dict
 
-    async def configure(self, config) -> None:
+    async def configure(self, config: types.SimpleNamespace):
         """Configure script components including camera and electrometer.
 
         Parameters
@@ -366,6 +367,7 @@ async def configure(self, config) -> None:
         config : `types.SimpleNamespace`
             Script configuration, as defined by `schema`.
         """
+
         await self.configure_camera()
 
         if hasattr(config, "electrometer_scan"):
@@ -406,12 +408,16 @@ async def configure(self, config) -> None:
                     "be a scalar."
                 )
 
-            if not isinstance(config.dark_exp_times, list):
-                config.dark_exp_times = (
-                    [config.dark_exp_times] * config.n_darks
+            if not isinstance(config.interleave_darks.dark_exp_times, list):
+                config.interleave_darks.dark_exp_times = (
+                    [config.interleave_darks.dark_exp_times] * (
+                        config.interleave_darks.n_darks
+                    )
                 )
             else:
-                config.n_darks = len(config.dark_exp_times)
+                config.interleave_darks.n_darks = len(
+                    config.interleave_darks.dark_exp_times
+                )
 
         self.config = config
 
@@ -581,8 +587,8 @@ async def take_ptc_flats(self):
                 mode=self.config.electrometer_scan.mode,
                 range=self.config.electrometer_scan.range,
                 integration_time=(
-                    self.config.electrometer_scan.integration_time,
-                )
+                    self.config.electrometer_scan.integration_time
+                ),
             )
 
         for i in range(0, len(self.config.flats_exp_times), 2):
diff --git a/python/lsst/ts/externalscripts/maintel/take_ptc_flats_comcam.py b/python/lsst/ts/externalscripts/maintel/take_ptc_flats_comcam.py
index c7bfc777a..56b1afbe3 100644
--- a/python/lsst/ts/externalscripts/maintel/take_ptc_flats_comcam.py
+++ b/python/lsst/ts/externalscripts/maintel/take_ptc_flats_comcam.py
@@ -61,7 +61,7 @@ def get_schema(cls):
             type: object
             properties:
               filter:
-                description: Filter name or ID. Default: "r_03"
+                description: Filter name or ID.
                 anyOf:
                   - type: string
                   - type: integer
diff --git a/tests/maintel/test_take_ptc_flats_comcam.py b/tests/maintel/test_take_ptc_flats_comcam.py
index 856b830ae..d0fc80fc9 100644
--- a/tests/maintel/test_take_ptc_flats_comcam.py
+++ b/tests/maintel/test_take_ptc_flats_comcam.py
@@ -35,20 +35,23 @@ def mock_electrometer(self):
         self.script.electrometer.evt_largeFileObjectAvailable = mock.Mock()
 
     async def test_configure(self):
+        electrometer_config = {
+            "index": 1,
+            "mode": "CURRENT",
+            "range": -1,
+            "integration_time": 0.1
+        }
+        interleave_darks_config = {
+                "dark_exp_times": 30,
+                "n_darks": 2
+        }
+
         config = {
             "filter": "r_03",
             "flats_exp_times": [7.25, 7.25],
-            "electrometer_scan": {
-                "index": 1,
-                "mode": "CURRENT",
-                "range": -1,
-                "integration_time": 0.1
-            },
-            "interleave_darks": {
-                "dark_exp_times": 30,
-                "n_darks": 2
+            "electrometer_scan": electrometer_config,
+            "interleave_darks": interleave_darks_config,
             }
-        }
 
         async with self.make_script():
             await self.configure_script(**config)