1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index b346441..773fba8 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -1036,6 +1036,18 @@ Module(
         self.assertEqual(ast.increment_lineno(src).lineno, 2)
         self.assertIsNone(ast.increment_lineno(src).end_lineno)
 
+    def test_increment_lineno_on_module(self):
+        src = ast.parse(dedent("""\
+        a = 1
+        b = 2 # type: ignore
+        c = 3
+        d = 4 # type: ignore@tag
+        """), type_comments=True)
+        ast.increment_lineno(src, n=5)
+        self.assertEqual(src.type_ignores[0].lineno, 7)
+        self.assertEqual(src.type_ignores[1].lineno, 9)
+        self.assertEqual(src.type_ignores[1].tag, '@tag')
+
     def test_iter_fields(self):
         node = ast.parse('foo()', mode='eval')
         d = dict(ast.iter_fields(node.body))