diff --git a/packages/pyright-internal/src/tests/samples/typeVar12.py b/packages/pyright-internal/src/tests/samples/typeVar12.py
index 69699fe2f7ae..f4fb6d9ad018 100644
--- a/packages/pyright-internal/src/tests/samples/typeVar12.py
+++ b/packages/pyright-internal/src/tests/samples/typeVar12.py
@@ -5,38 +5,46 @@
 
 from typing import Callable, Generic, Optional, ParamSpec, TypeVar
 
-S = TypeVar('S')
-T = TypeVar('T')
-P = ParamSpec('P')
+S = TypeVar("S")
+T = TypeVar("T")
+P = ParamSpec("P")
 
 CallableAlias1 = Callable[[T], T]
 CallableAlias2 = Callable[[T], T] | T
 
+
 def func1() -> Callable[[T], T] | None:
     # This should generate an error.
     x: Optional[T] = None
 
+
 def func2() -> Callable[[T], T] | list[T] | None:
     x: Optional[T] = None
 
+
 def func3() -> CallableAlias1[T] | None:
     # This should generate an error.
     x: Optional[T] = None
 
+
 def func4() -> CallableAlias2[T] | None:
     x: Optional[T] = None
 
+
 def func5() -> Callable[[list[T]], set[T]] | None:
     # This should generate an error.
     x: Optional[T] = None
 
+
 def func6() -> Callable[[list[T]], set[T]] | Callable[[set[T]], set[T]] | None:
     x: Optional[T] = None
 
+
 def func7() -> Callable[P, None] | None:
     # This should generate two errors, once for each P reference.
     def inner(*args: P.args, **kwargs: P.kwargs) -> None:
         pass
+
     return
 
 
@@ -44,8 +52,8 @@ class A(Generic[T]):
     def method1(self) -> Callable[[T], T] | None:
         x: Optional[T] = None
 
+
 class B(Generic[S]):
     def method1(self) -> Callable[[T], T] | None:
         # This should generate an error.
         x: Optional[T] = None
-