diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08b77443..306514ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - `accelerator` parameter controls the accelerator (CPU, GPU, etc) that is used.
 - `devices` parameter controls the number of accelerators used.
 - `val_check_interval` parameter controls the frequency of both validation epochs and model checkpointing during training.
+- `train_label_smoothing` parameter controls the amount of label smoothing applied when calculating the training loss.
 
 ### Changed
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 267dfa0f..a690bd8a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -190,6 +190,7 @@ def tiny_config(tmp_path):
         "n_head": 2,
         "dim_feedforward": 10,
         "n_layers": 1,
+        "train_label_smoothing": 0.01,
         "warmup_iters": 1,
         "max_iters": 1,
         "max_epochs": 20,