diff --git a/Lib/test/output/test_re b/Lib/test/output/test_re
index c03b0f0..c0a8366 100644
--- a/Lib/test/output/test_re
+++ b/Lib/test/output/test_re
@@ -214,6 +214,7 @@
 ('(a)b(c)', 'abc', 0, 'found+"-"+g1+"-"+g2', 'abc-a-c')
 ('a+b+c', 'aabbabc', 0, 'found', 'abc')
 ('a{1,}b{1,}c', 'aabbabc', 0, 'found', 'abc')
+('a**', '-', 2)
 ('a.+?c', 'abcabc', 0, 'found', 'abc')
 ('(a+|b)*', 'ab', 0, 'found+"-"+g1', 'ab-b')
 ('(a+|b){0,}', 'ab', 0, 'found+"-"+g1', 'ab-b')
@@ -255,6 +256,7 @@
 ('(bc+d$|ef*g.|h?i(j|k))', 'reffgz', 0, 'found+"-"+g1+"-"+g2', 'effgz-effgz-None')
 ('((((((((((a))))))))))', 'a', 0, 'g10', 'a')
 ('((((((((((a))))))))))\\10', 'aa', 0, 'found', 'aa')
+('((((((((((a))))))))))\\41', '', 2)
 ('(((((((((a)))))))))', 'a', 0, 'found', 'a')
 ('multiple words of text', 'uh-uh', 1)
 ('multiple words', 'multiple words, yeah', 0, 'found', 'multiple words')
@@ -336,6 +338,7 @@
 ('(?i)(a)b(c)', 'ABC', 0, 'found+"-"+g1+"-"+g2', 'ABC-A-C')
 ('(?i)a+b+c', 'AABBABC', 0, 'found', 'ABC')
 ('(?i)a{1,}b{1,}c', 'AABBABC', 0, 'found', 'ABC')
+('(?i)a**', '-', 2)
 ('(?i)a.+?c', 'ABCABC', 0, 'found', 'ABC')
 ('(?i)a.*?c', 'ABCABC', 0, 'found', 'ABC')
 ('(?i)a.{0,5}?c', 'ABCABC', 0, 'found', 'ABC')
@@ -380,6 +383,7 @@
 ('(?i)(bc+d$|ef*g.|h?i(j|k))', 'REFFGZ', 0, 'found+"-"+g1+"-"+g2', 'EFFGZ-EFFGZ-None')
 ('(?i)((((((((((a))))))))))', 'A', 0, 'g10', 'A')
 ('(?i)((((((((((a))))))))))\\10', 'AA', 0, 'found', 'AA')
+('(?i)((((((((((a))))))))))\\41', '', 2)
 ('(?i)(((((((((a)))))))))', 'A', 0, 'found', 'A')
 ('(?i)(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))', 'A', 0, 'g1', 'A')
 ('(?i)(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))', 'C', 0, 'g1', 'C')
@@ -398,8 +402,14 @@
 ('^(.+)?B', 'AB', 0, 'g1', 'A')
 ('w(?# comment', 'w', 2)
 ('w(?# comment 1)xy(?# comment 2)z', 'wxyz', 0, 'found', 'wxyz')
-('w# comment 1\012        x(?x) y\012\011# comment 2\012\011z', 'wxyz', 0, 'found', 'wxyz')
+('w(?i)', 'W', 2)
+('(?x)w# comment 1\012        x y\012\011# comment 2\012\011z', 'wxyz', 0, 'found', 'wxyz')
 ('^abc', 'jkl\012abc\012xyz', 1)
 ('(?m)^abc', 'jkl\012abc\012xyz', 0, 'found', 'abc')
+('(?m)abc$', 'jkl\012xyzabc\012123', 0, 'found', 'abc')
 ('a.b', 'a\012b', 1)
 ('(?s)a.b', 'a\012b', 0, 'found', 'a\012b')
+('\\w+', '--ab_cd0123--', 0, 'found', 'ab_cd0123')
+('\\D+', '1234abc5678', 0, 'found', 'abc')
+('[\\da-fA-F]+', '123abc', 0, 'found', '123abc')
+('[\\d-x]', '-', 2)