diff --git a/src/coffea/jetmet_tools/CorrectedJetsFactory.py b/src/coffea/jetmet_tools/CorrectedJetsFactory.py
index 86607fef4..616bf1af0 100644
--- a/src/coffea/jetmet_tools/CorrectedJetsFactory.py
+++ b/src/coffea/jetmet_tools/CorrectedJetsFactory.py
@@ -434,6 +434,6 @@ def build_variant(unc, template, jetpt, jetpt_orig, jetmass, jetmass_orig):
             _AwkwardRewrapFn(gfunc=rewrap_recordarray),
             out,
             jets,
-            label="corrected-jets",
+            label="corrected_jets",
             meta=out_meta,
         )
diff --git a/src/coffea/jetmet_tools/FactorizedJetCorrector.py b/src/coffea/jetmet_tools/FactorizedJetCorrector.py
index e85b06a8f..0f752e49e 100644
--- a/src/coffea/jetmet_tools/FactorizedJetCorrector.py
+++ b/src/coffea/jetmet_tools/FactorizedJetCorrector.py
@@ -224,7 +224,7 @@ def getSubCorrections(self, **kwargs):
                 corrections.append(
                     func(
                         *fargs,
-                        dask_label=f"{self._campaign}-{self._dataera}-{self._datatype}-{self._levels[i]}-{self._jettype}",
+                        dask_label=f"{self._campaign}_{self._dataera}_{self._datatype}_{self._levels[i]}_{self._jettype}",
                     )
                 )
             else:
diff --git a/src/coffea/jetmet_tools/JetCorrectionUncertainty.py b/src/coffea/jetmet_tools/JetCorrectionUncertainty.py
index b4583bd9c..26f43f873 100644
--- a/src/coffea/jetmet_tools/JetCorrectionUncertainty.py
+++ b/src/coffea/jetmet_tools/JetCorrectionUncertainty.py
@@ -168,7 +168,7 @@ def getUncertainty(self, **kwargs):
                 uncs.append(
                     func(
                         *args,
-                        dask_label=f"{self._campaign}-{self._dataera}-{self._datatype}-{self._levels[i]}-{self._jettype}",
+                        dask_label=f"{self._campaign}_{self._dataera}_{self._datatype}_{self._levels[i]}_{self._jettype}",
                     )
                 )
             else:
diff --git a/src/coffea/jetmet_tools/JetResolution.py b/src/coffea/jetmet_tools/JetResolution.py
index bb1f5a1f3..18cb0ca02 100644
--- a/src/coffea/jetmet_tools/JetResolution.py
+++ b/src/coffea/jetmet_tools/JetResolution.py
@@ -159,7 +159,7 @@ def getResolution(self, **kwargs):
                 resos.append(
                     func(
                         *args,
-                        dask_label=f"{self._campaign}-{self._dataera}-{self._datatype}-{self._levels[i]}-{self._jettype}",
+                        dask_label=f"{self._campaign}_{self._dataera}_{self._datatype}_{self._levels[i]}_{self._jettype}",
                     )
                 )
             else:
diff --git a/src/coffea/jetmet_tools/JetResolutionScaleFactor.py b/src/coffea/jetmet_tools/JetResolutionScaleFactor.py
index 58ed4a380..40f7c3b5d 100644
--- a/src/coffea/jetmet_tools/JetResolutionScaleFactor.py
+++ b/src/coffea/jetmet_tools/JetResolutionScaleFactor.py
@@ -155,7 +155,7 @@ def getScaleFactor(self, **kwargs):
                 sfs.append(
                     func(
                         *args,
-                        dask_label=f"{self._campaign}-{self._dataera}-{self._datatype}-{self._levels[i]}-{self._jettype}",
+                        dask_label=f"{self._campaign}_{self._dataera}_{self._datatype}_{self._levels[i]}_{self._jettype}",
                     )
                 )
             else:
diff --git a/src/coffea/ml_tools/helper.py b/src/coffea/ml_tools/helper.py
index 2ecedbe6e..15d282879 100644
--- a/src/coffea/ml_tools/helper.py
+++ b/src/coffea/ml_tools/helper.py
@@ -358,7 +358,7 @@ def __call__(self, wrapper, *args):
             wrap,
             self._delayed_wrapper,
             *packed_args,
-            label=f"numpy_call_{self.__class__.__name__}_",
+            label=f"numpy_call_{self.__class__.__name__}",
             meta=wrap_meta,
         )
         arr = unpack_ret_array(arr)
diff --git a/src/coffea/nanoevents/methods/base.py b/src/coffea/nanoevents/methods/base.py
index 7779340e0..a57d23c01 100644
--- a/src/coffea/nanoevents/methods/base.py
+++ b/src/coffea/nanoevents/methods/base.py
@@ -236,7 +236,7 @@ def _apply_global_index(self, dask_array, index):
         return dask_array.map_partitions(
             _ClassMethodFn("_apply_global_index"),
             index,
-            label="_apply_global_index",
+            label="apply_global_index",
         )
 
     @dask_method(no_dispatch=True)
diff --git a/src/coffea/nanoevents/methods/physlite.py b/src/coffea/nanoevents/methods/physlite.py
index d905607fb..fc901ff67 100644
--- a/src/coffea/nanoevents/methods/physlite.py
+++ b/src/coffea/nanoevents/methods/physlite.py
@@ -95,7 +95,7 @@ def _get_target_offsets(load_column, event_index):
     ):
         # wrap in map_partitions if dask arrays
         return dask_awkward.map_partitions(
-            _get_target_offsets, load_column, event_index
+            _get_target_offsets, load_column, event_index, label="get_target_offsets"
         )
 
     offsets = load_column.layout.offsets.data