diff --git a/tests/scripts/check-files.py b/tests/scripts/check-files.py
index de4d24527..5bec6dbf1 100755
--- a/tests/scripts/check-files.py
+++ b/tests/scripts/check-files.py
@@ -137,7 +137,7 @@ class LineIssueTracker(FileIssueTracker):
 
 def is_windows_file(filepath):
     _root, ext = os.path.splitext(filepath)
-    return ext in ('.bat', '.dsp', '.sln', '.vcxproj')
+    return ext in ('.bat', '.dsp', '.dsw', '.sln', '.vcxproj')
 
 
 class PermissionIssueTracker(FileIssueTracker):