diff --git a/llmfoundry/models/layers/attention.py b/llmfoundry/models/layers/attention.py
index 00cb36d215..39fa7162ac 100644
--- a/llmfoundry/models/layers/attention.py
+++ b/llmfoundry/models/layers/attention.py
@@ -213,7 +213,8 @@ def flash_attn_fn(
     try:
         from flash_attn import bert_padding, flash_attn_interface  # type: ignore # yapf: disable # isort: skip
     except:
-        raise RuntimeError('Please install flash-attn==1.0.9 or flash-attn==2.3.2')
+        raise RuntimeError(
+            'Please install flash-attn==1.0.9 or flash-attn==2.3.2')
 
     check_valid_inputs(query, key, value)