diff --git a/Lib/csv.py b/Lib/csv.py
index dc85077f3ec663..93f9fc7260c6d8 100644
--- a/Lib/csv.py
+++ b/Lib/csv.py
@@ -214,10 +214,10 @@ def _guess_quote_and_delimiter(self, data, delimiters):
         """
 
         matches = []
-        for restr in (r'(?P<delim>[^\w\n"\'])(?P<space> ?)(?P<quote>["\']).*?(?P=quote)(?P=delim)', # ,".*?",
-                      r'(?:^|\n)(?P<quote>["\']).*?(?P=quote)(?P<delim>[^\w\n"\'])(?P<space> ?)',   #  ".*?",
-                      r'(?P<delim>[^\w\n"\'])(?P<space> ?)(?P<quote>["\']).*?(?P=quote)(?:$|\n)',   # ,".*?"
-                      r'(?:^|\n)(?P<quote>["\']).*?(?P=quote)(?:$|\n)'):                            #  ".*?" (no delim, no space)
+        for restr in (r'(?P<delim>[^\w\n"\'])(?P<space> ?)(?P<quote>["\'])[^\n]*?(?P=quote)(?P=delim)', # ,".*?",
+                      r'(?:^|\n)(?P<quote>["\'])[^\n]*?(?P=quote)(?P<delim>[^\w\n"\'])(?P<space> ?)',   #  ".*?",
+                      r'(?P<delim>[^\w\n"\'])(?P<space> ?)(?P<quote>["\'])[^\n]*?(?P=quote)(?:$|\n)',   # ,".*?"
+                      r'(?:^|\n)(?P<quote>["\'])[^\n]*?(?P=quote)(?:$|\n)'):                            #  ".*?" (no delim, no space)
             regexp = re.compile(restr, re.DOTALL | re.MULTILINE)
             matches = regexp.findall(data)
             if matches: