diff --git a/tests/screenshot.py b/tests/screenshot.py
index 6ccb5930..89fd0fe7 100644
--- a/tests/screenshot.py
+++ b/tests/screenshot.py
@@ -167,7 +167,7 @@ def _iter_pos(self):
 def iter_rows(pil_image):
     """Yield tuple of pixels for each row in the image.
 
-    itertools.izip in Python 2.x and zip in Python 3.x are writen in C. Much faster than anything else I've found
+    itertools.izip in Python 2.x and zip in Python 3.x are written in C. Much faster than anything else I've found
     written in pure Python.
 
     From: