diff --git a/src/huggingface_hub/__init__.py b/src/huggingface_hub/__init__.py
index d1b46db2a8..a869ff9b2e 100644
--- a/src/huggingface_hub/__init__.py
+++ b/src/huggingface_hub/__init__.py
@@ -46,7 +46,7 @@
 from typing import TYPE_CHECKING
 
 
-__version__ = "0.27.0.dev0"
+__version__ = "0.28.0.rc0"
 
 # Alphabetical order of definitions is ensured in tests
 # WARNING: any comment added in this dictionary definition will be lost when
diff --git a/tests/testing_utils.py b/tests/testing_utils.py
index 10bdf93263..6f6d67c4c0 100644
--- a/tests/testing_utils.py
+++ b/tests/testing_utils.py
@@ -396,9 +396,9 @@ def _inner(*args, **kwargs):
             if name == "self":
                 continue
             assert parameter.annotation is Mock
-            assert name in mocks, (
-                f"Mock `{name}` not found for test `{fn.__name__}`. Available: {', '.join(sorted(mocks.keys()))}"
-            )
+            assert (
+                name in mocks
+            ), f"Mock `{name}` not found for test `{fn.__name__}`. Available: {', '.join(sorted(mocks.keys()))}"
             new_kwargs[name] = mocks[name]
 
         # Run test only with a subset of mocks