diff --git a/test-data/samples/generators.py b/test-data/samples/generators.py
index eb6d70104144..17e94c1bfb45 100644
--- a/test-data/samples/generators.py
+++ b/test-data/samples/generators.py
@@ -6,7 +6,7 @@
 
 def iter_primes() -> Iterator[int]:
     # an iterator of all numbers between 2 and +infinity
-    numbers: Iterator[int] = itertools.count(2)
+    numbers = itertools.count(2)  # type: Iterator[int]
 
     # generate primes forever
     while True: