diff --git a/examples/cloud/launch_gce.py b/examples/cloud/launch_gce.py
index a4a6c3765a..0520b30b5a 100644
--- a/examples/cloud/launch_gce.py
+++ b/examples/cloud/launch_gce.py
@@ -202,8 +202,7 @@ def launch_gce(*, vm_name: str, startup_script: str):
 
 
 def print_howto(login_args: Sequence[str]):
-  print(
-      f"""
+  print(f"""
 ###############################################################################
 ###############################################################################
 
@@ -227,8 +226,7 @@ def print_howto(login_args: Sequence[str]):
 
 ###############################################################################
 ###############################################################################
-"""
-  )
+""")
 
 
 def main(_):
diff --git a/examples/nlp_seq/train.py b/examples/nlp_seq/train.py
index bcb268cf9f..72ce469507 100644
--- a/examples/nlp_seq/train.py
+++ b/examples/nlp_seq/train.py
@@ -42,9 +42,9 @@
 
 FLAGS = flags.FLAGS
 
-flags.DEFINE_string('model_dir', default='', help=('Directory for model data.'))
+flags.DEFINE_string('model_dir', default='', help='Directory for model data.')
 
-flags.DEFINE_string('experiment', default='xpos', help=('Experiment name.'))
+flags.DEFINE_string('experiment', default='xpos', help='Experiment name.')
 
 flags.DEFINE_integer('batch_size', default=64, help='Batch size for training.')
 
@@ -58,7 +58,7 @@
     'num_train_steps', default=75000, help='Number of train steps.'
 )
 
-flags.DEFINE_float('learning_rate', default=0.05, help=('Learning rate.'))
+flags.DEFINE_float('learning_rate', default=0.05, help='Learning rate.')
 
 flags.DEFINE_float(
     'weight_decay',
@@ -74,9 +74,9 @@
     'random_seed', default=0, help='Integer for PRNG random seed.'
 )
 
-flags.DEFINE_string('train', default='', help=('Path to training data.'))
+flags.DEFINE_string('train', default='', help='Path to training data.')
 
-flags.DEFINE_string('dev', default='', help=('Path to development data.'))
+flags.DEFINE_string('dev', default='', help='Path to development data.')
 
 
 def create_learning_rate_scheduler(
diff --git a/flax/core/nn/linear.py b/flax/core/nn/linear.py
index b5816e4a2d..cfd62154e9 100644
--- a/flax/core/nn/linear.py
+++ b/flax/core/nn/linear.py
@@ -75,7 +75,8 @@ def dense_general(
     if set(batch_dims) != set(range(max_dim + 1)):
       raise ValueError(
           'batch_dims %s must be consecutive leading '
-          'dimensions starting from 0.' % str(batch_dims)
+          'dimensions starting from 0.'
+          % str(batch_dims)
       )
 
   ndim = inputs.ndim
diff --git a/flax/errors.py b/flax/errors.py
index c8ef7d79df..df28287728 100644
--- a/flax/errors.py
+++ b/flax/errors.py
@@ -708,7 +708,8 @@ def __call__(self, x):
 
   def __init__(self):
     super().__init__(
-        'Can only call init, init_with_output or apply methods on an instance of the Module class, not the Module class itself'
+        'Can only call init, init_with_output or apply methods on an instance'
+        ' of the Module class, not the Module class itself'
     )
 
 
@@ -757,7 +758,8 @@ def __call__(self, x):
 
   def __init__(self):
     super().__init__(
-        'Trying to access a property that is accessing a non-existent attribute.'
+        'Trying to access a property that is accessing a non-existent'
+        ' attribute.'
     )
 
 
@@ -772,7 +774,8 @@ class InvalidCheckpointError(FlaxError):
 
   def __init__(self, path, step):
     super().__init__(
-        f'Trying to save an outdated checkpoint at step: "{step}" and path: "{path}".'
+        f'Trying to save an outdated checkpoint at step: "{step}" and path:'
+        f' "{path}".'
     )
 
 
diff --git a/flax/linen/attention.py b/flax/linen/attention.py
index 7b74685cb8..3ecdc72ff1 100644
--- a/flax/linen/attention.py
+++ b/flax/linen/attention.py
@@ -237,9 +237,9 @@ class MultiHeadDotProductAttention(Module):
   deterministic: Optional[bool] = None
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
   use_bias: bool = True
   attention_fn: Callable[..., Array] = dot_product_attention
   decode: bool = False
diff --git a/flax/linen/experimental/layers_with_named_axes.py b/flax/linen/experimental/layers_with_named_axes.py
index 4c5ca87a2e..cb8c4e09d8 100644
--- a/flax/linen/experimental/layers_with_named_axes.py
+++ b/flax/linen/experimental/layers_with_named_axes.py
@@ -68,9 +68,9 @@ class Dense(nn.Module):
   param_dtype: DType = jnp.float32
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, DType], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, DType], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, DType], Array] = (
+      initializers.zeros_init()
+  )
   kernel_axes: Tuple[str, ...] = ()
   dot_general: DotGeneralT = lax.dot_general
 
@@ -305,12 +305,12 @@ class LayerNorm(nn.Module):
   param_dtype: DType = jnp.float32
   use_bias: bool = True
   use_scale: bool = True
-  bias_init: Callable[
-      [PRNGKey, Shape, DType], Array
-  ] = initializers.zeros_init()
-  scale_init: Callable[
-      [PRNGKey, Shape, DType], Array
-  ] = initializers.ones_init()
+  bias_init: Callable[[PRNGKey, Shape, DType], Array] = (
+      initializers.zeros_init()
+  )
+  scale_init: Callable[[PRNGKey, Shape, DType], Array] = (
+      initializers.ones_init()
+  )
 
   @nn.compact
   def __call__(self, x):
diff --git a/flax/linen/linear.py b/flax/linen/linear.py
index 522b71696f..463efeb10d 100644
--- a/flax/linen/linear.py
+++ b/flax/linen/linear.py
@@ -93,9 +93,9 @@ class DenseGeneral(Module):
   dtype: Optional[Dtype] = None
   param_dtype: Dtype = jnp.float32
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
   precision: PrecisionLike = None
   dot_general: DotGeneralT = lax.dot_general
 
@@ -117,7 +117,8 @@ def __call__(self, inputs: Array) -> Array:
       if set(batch_dims) != set(range(max_dim + 1)):
         raise ValueError(
             'batch_dims %s must be consecutive leading '
-            'dimensions starting from 0.' % str(batch_dims)
+            'dimensions starting from 0.'
+            % str(batch_dims)
         )
 
     ndim = inputs.ndim
@@ -207,9 +208,9 @@ class Dense(Module):
   param_dtype: Dtype = jnp.float32
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
   dot_general: DotGeneralT = lax.dot_general
 
   @compact
@@ -334,9 +335,9 @@ class _Conv(Module):
   param_dtype: Dtype = jnp.float32
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
   conv_general_dilated: ConvGeneralDilatedT = lax.conv_general_dilated
 
   @property
@@ -444,7 +445,7 @@ def maybe_broadcast(
     else:
       if self.feature_group_count != 1:
         raise NotImplementedError(
-            f'`lax.conv_general_dilated_local` does not support '
+            '`lax.conv_general_dilated_local` does not support '
             f'`feature_group_count != 1`, got `{self.feature_group_count}`.'
         )
 
@@ -660,9 +661,9 @@ class ConvTranspose(Module):
   param_dtype: Dtype = jnp.float32
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
   transpose_kernel: bool = False
 
   @compact
diff --git a/flax/linen/recurrent.py b/flax/linen/recurrent.py
index e805aef4af..259127380b 100644
--- a/flax/linen/recurrent.py
+++ b/flax/linen/recurrent.py
@@ -225,9 +225,9 @@ class DenseParams(Module):
   param_dtype: Dtype = jnp.float32
   precision: PrecisionLike = None
   kernel_init: Callable[[PRNGKey, Shape, Dtype], Array] = default_kernel_init
-  bias_init: Callable[
-      [PRNGKey, Shape, Dtype], Array
-  ] = initializers.zeros_init()
+  bias_init: Callable[[PRNGKey, Shape, Dtype], Array] = (
+      initializers.zeros_init()
+  )
 
   @compact
   def __call__(self, inputs: Array) -> Tuple[Array, Optional[Array]]:
@@ -728,9 +728,9 @@ class RNN(Module):
   reverse: bool = False
   keep_order: bool = False
   unroll: int = 1
-  variable_axes: Mapping[
-      lift.CollectionFilter, lift.InOutScanAxis
-  ] = FrozenDict()
+  variable_axes: Mapping[lift.CollectionFilter, lift.InOutScanAxis] = (
+      FrozenDict()
+  )
   variable_broadcast: lift.CollectionFilter = 'params'
   variable_carry: lift.CollectionFilter = False
   split_rngs: Mapping[lift.PRNGSequenceFilter, bool] = FrozenDict(
diff --git a/flax/training/checkpoints.py b/flax/training/checkpoints.py
index e14eacb07c..84d8bfe4cf 100644
--- a/flax/training/checkpoints.py
+++ b/flax/training/checkpoints.py
@@ -1074,10 +1074,10 @@ def restore_checkpoint(
           target
       )
       if isinstance(orbax_checkpointer._handler, ocp.PyTreeCheckpointHandler):  # pylint: disable=protected-access
-        restore_kwargs[
-            'transforms'
-        ] = orbax_utils.maybe_construct_transformations(
-            target, orbax_transforms
+        restore_kwargs['transforms'] = (
+            orbax_utils.maybe_construct_transformations(
+                target, orbax_transforms
+            )
         )
     restored = orbax_checkpointer.restore(
         ckpt_path, item=target, **restore_kwargs
diff --git a/pyproject.toml b/pyproject.toml
index 344fb82713..e8fc9051b3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -150,4 +150,5 @@ exclude_lines = [
 [tool.pyink]
 pyink-indentation = 2
 pyink-use-majority-quotes = true
-line-length = 80
\ No newline at end of file
+line-length = 80
+preview = true
\ No newline at end of file
diff --git a/tests/core/core_frozen_dict_test.py b/tests/core/core_frozen_dict_test.py
index 4f2df7283f..a44405ffb9 100644
--- a/tests/core/core_frozen_dict_test.py
+++ b/tests/core/core_frozen_dict_test.py
@@ -128,7 +128,9 @@ def test_utility_copy(self, x, add_or_replace, actual_new_x):
       },
       {
           'x': FrozenDict({'a': 1, 'b': {'c': 2}}),
-          'pretty_str': 'FrozenDict({\n    a: 1,\n    b: {\n        c: 2,\n    },\n})',
+          'pretty_str': (
+              'FrozenDict({\n    a: 1,\n    b: {\n        c: 2,\n    },\n})'
+          ),
       },
       {
           'x': 345,
diff --git a/tests/core/core_scope_test.py b/tests/core/core_scope_test.py
index ba7fa5e56a..63744e9560 100644
--- a/tests/core/core_scope_test.py
+++ b/tests/core/core_scope_test.py
@@ -128,7 +128,10 @@ def test_inconsistent_param_shapes(self):
     def f(scope):
       scope.param('test', nn.initializers.ones_init(), (4,))
 
-    msg = r'Initializer expected to generate shape \(2,\) but got shape \(4,\) instead for parameter "test" in "/"'
+    msg = (
+        r'Initializer expected to generate shape \(2,\) but got shape \(4,\)'
+        r' instead for parameter "test" in "/"'
+    )
     with self.assertRaisesRegex(errors.ScopeParamShapeError, msg):
       apply(f)(freeze({'params': {'test': np.ones((2,))}}))