diff --git a/benchmarks/bm_runner.py b/benchmarks/bm_runner.py
index c8b09cbb..dcf3b137 100644
--- a/benchmarks/bm_runner.py
+++ b/benchmarks/bm_runner.py
@@ -182,6 +182,7 @@ def func(args: argparse.Namespace):
 
 class Branch(_SubParserGenerator):
     """Class for parsing and running the 'branch' argument."""
+
     name = "branch"
     description = (
         "Performs the same operations as ``overnight``, but always on two commits "
@@ -295,6 +296,7 @@ def csperf(args: argparse.Namespace, run_type: Literal["cperf", "sperf"]) -> Non
 
 class CPerf(_CSPerf):
     """Class for parsing and running the 'cperf' argument."""
+
     name = "cperf"
     description = _CSPerf.description.format("CPerf")
     epilog = _CSPerf.epilog.format("cperf")
@@ -306,6 +308,7 @@ def func(args: argparse.Namespace) -> None:
 
 class SPerf(_CSPerf):
     """Class for parsing and running the 'sperf' argument."""
+
     name = "sperf"
     description = _CSPerf.description.format("SPerf")
     epilog = _CSPerf.epilog.format("sperf")
@@ -317,6 +320,7 @@ def func(args: argparse.Namespace) -> None:
 
 class Custom(_SubParserGenerator):
     """Class for parsing and running the 'custom' argument."""
+
     name = "custom"
     description = (
         "Run ASV with the input **ASV sub-command**, without any preset "