diff --git a/ampel/lsst/alert/load/ElasticcTrainingsetLoader.py b/ampel/lsst/alert/load/ElasticcTrainingsetLoader.py
index 42bc83a..81c6532 100644
--- a/ampel/lsst/alert/load/ElasticcTrainingsetLoader.py
+++ b/ampel/lsst/alert/load/ElasticcTrainingsetLoader.py
@@ -352,7 +352,14 @@ def __init__(self, **kwargs) -> None:
         )
 
         if self.skip_transients != 0:
-            next(islice(self.lightcurves, self.skip_transients, self.skip_transients), None)
+            next(
+                islice(
+                    self.lightcurves,
+                    self.skip_transients,
+                    self.skip_transients,
+                ),
+                None,
+            )
 
         self.next_lightcurve()
 
diff --git a/ampel/lsst/alert/load/KafkaAlertLoader.py b/ampel/lsst/alert/load/KafkaAlertLoader.py
index 0bd183e..98a7bf4 100644
--- a/ampel/lsst/alert/load/KafkaAlertLoader.py
+++ b/ampel/lsst/alert/load/KafkaAlertLoader.py
@@ -30,9 +30,9 @@ class StaticSchemaURL(AmpelBaseModel):
 
 class SASLAuthentication(AmpelBaseModel):
     protocol: Literal["SASL_PLAINTEXT", "SASL_SSL"] = "SASL_PLAINTEXT"
-    mechanism: Literal[
-        "PLAIN", "SCRAM-SHA-256", "SCRAM-SHA-512"
-    ] = "SCRAM-SHA-512"
+    mechanism: Literal["PLAIN", "SCRAM-SHA-256", "SCRAM-SHA-512"] = (
+        "SCRAM-SHA-512"
+    )
     username: NamedSecret[str]
     password: NamedSecret[str]
 
diff --git a/ampel/lsst/alert/load/MultiAvroAlertLoader.py b/ampel/lsst/alert/load/MultiAvroAlertLoader.py
index e8e6d88..b44337b 100644
--- a/ampel/lsst/alert/load/MultiAvroAlertLoader.py
+++ b/ampel/lsst/alert/load/MultiAvroAlertLoader.py
@@ -33,10 +33,10 @@ def __init__(self, **kwargs) -> None:
         self.set_alert_source(self.loader)
 
     def set_alert_source(self, loader) -> None:
-        self.alert_loader: AbsAlertLoader[
-            Iterable[IOBase]
-        ] = AuxUnitRegister.new_unit(  # type: ignore
-            model=loader
+        self.alert_loader: AbsAlertLoader[Iterable[IOBase]] = (
+            AuxUnitRegister.new_unit(  # type: ignore
+                model=loader
+            )
         )
         self.next_file()
 
diff --git a/ampel/lsst/t0/SimpleLSSTFilter.py b/ampel/lsst/t0/SimpleLSSTFilter.py
index 9e811c0..b80a53d 100644
--- a/ampel/lsst/t0/SimpleLSSTFilter.py
+++ b/ampel/lsst/t0/SimpleLSSTFilter.py
@@ -44,7 +44,9 @@ class SimpleLSSTFilter(CatalogMatchUnit, AbsAlertFilter):
     # Gaia
     gaia_rs: float  # search radius for GAIA DR2 matching [arcsec]
     gaia_pm_signif: float  # significance of proper motion detection of GAIA counterpart [sigma]
-    gaia_plx_signif: float  # significance of parallax detection of GAIA counterpart [sigma]
+    gaia_plx_signif: (
+        float  # significance of parallax detection of GAIA counterpart [sigma]
+    )
     gaia_veto_gmag_min: float  # min gmag for normalized distance cut of GAIA counterparts [mag]
     gaia_veto_gmag_max: float  # max gmag for normalized distance cut of GAIA counterparts [mag]
     gaia_excessnoise_sig_max: float  # maximum allowed noise (expressed as significance) for Gaia match to be trusted.