diff --git a/benchmarks/test_parity.py b/benchmarks/test_parity.py
index 433cfb0090..d026096a84 100644
--- a/benchmarks/test_parity.py
+++ b/benchmarks/test_parity.py
@@ -9,7 +9,7 @@ from pytorch_lightning import Trainer, seed_everything
 from tests.base.models import ParityModuleMNIST, ParityModuleRNN
 
 
-# TODO: explore where the time leak comes from
+# ParityModuleMNIST runs with num_workers=1
 @pytest.mark.parametrize('cls_model,max_diff', [
     (ParityModuleRNN, 0.05),
     (ParityModuleMNIST, 0.22)