From e925175040f0f55b6fadf7cd03bd77fb17650b39 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Thu, 7 Mar 2019 12:13:15 -0800
Subject: Add test for underscore in number

---
 Lib/test/test_type_comments.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Lib/test/test_type_comments.py b/Lib/test/test_type_comments.py
index 7f71ee851d..cac6e8b25d 100644
--- a/Lib/test/test_type_comments.py
+++ b/Lib/test/test_type_comments.py
@@ -40,6 +40,10 @@ a = 42
 f"{a}"
 """
 
+underscorednumber = """\
+a = 42_42_42
+"""
+
 redundantdef = """\
 def foo():  # type: () -> int
     # type: () -> str
@@ -229,6 +233,10 @@ class TypeCommentTests(unittest.TestCase):
         for tree in self.parse_all(fstring, minver=6):
             pass
 
+    def test_underscorednumber(self):
+        for tree in self.parse_all(underscorednumber, minver=6):
+            pass
+
     def test_redundantdef(self):
         for tree in self.parse_all(redundantdef, maxver=0,
                                 expected_regex="^Cannot have two type comments on def"):
-- 
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