diff --git a/asynq/batching.py b/asynq/batching.py
index ac08a3c..25d76fe 100644
--- a/asynq/batching.py
+++ b/asynq/batching.py
@@ -167,11 +167,11 @@ def _try_switch_active_batch(self):
     def __str__(self):
         return "%s (%s, %i items)" % (
             core_inspection.get_full_name(type(self)),
-            "cancelled"
-            if self.is_cancelled()
-            else "flushed"
-            if self.is_flushed()
-            else "pending",
+            (
+                "cancelled"
+                if self.is_cancelled()
+                else "flushed" if self.is_flushed() else "pending"
+            ),
             len(self.items),
         )
 
diff --git a/asynq/debug.py b/asynq/debug.py
index 7402f6e..3335b34 100644
--- a/asynq/debug.py
+++ b/asynq/debug.py
@@ -424,7 +424,7 @@ def filter_traceback(tb_list):
         did_replacement = False
         # for each replacement, try checking if all lines match
         # if so, replace with the given replacement
-        for (text_to_match, replacement) in REPLACEMENTS:
+        for text_to_match, replacement in REPLACEMENTS:
             matches = True
             j = 0
             while j < len(text_to_match) and (i + j) < len(tb_list):
diff --git a/asynq/tests/test_scoped_value.py b/asynq/tests/test_scoped_value.py
index 78cc45e..58ba4bd 100644
--- a/asynq/tests/test_scoped_value.py
+++ b/asynq/tests/test_scoped_value.py
@@ -44,7 +44,6 @@ def async_scoped_value_caller():
 
 
 def test_async_scoped_value():
-
     async_scoped_value_caller()
 
     val = AsyncScopedValue("capybara")
diff --git a/asynq/tests/test_tools.py b/asynq/tests/test_tools.py
index 45d03c0..ccd03a0 100644
--- a/asynq/tests/test_tools.py
+++ b/asynq/tests/test_tools.py
@@ -392,9 +392,7 @@ def fn(foo, bar, baz=None, **kwargs):
 
         decorated = aretry(Exception)(fn)
 
-        assert_eq(
-            inspect.signature(fn), inspect.signature(get_original_fn(decorated))
-        )
+        assert_eq(inspect.signature(fn), inspect.signature(get_original_fn(decorated)))
 
 
 class Ctx(AsyncContext):
diff --git a/pyproject.toml b/pyproject.toml
index 9cebef0..d5ca5f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 target_version = ['py36', 'py37', 'py38', 'py39']
 include = '\.pyi?$'
 skip-magic-trailing-comma = true
-experimental-string-processing = true
+preview = true
 
 exclude = '''
 /(