diff --git a/Lib/test/re_tests.py b/Lib/test/re_tests.py
index 5ba9f1652e1..85b026736ca 100755
--- a/Lib/test/re_tests.py
+++ b/Lib/test/re_tests.py
@@ -88,7 +88,6 @@ tests = [
     # NOTE: not an error under PCRE/PRE:
     (r'\u', '', SYNTAX_ERROR),    # A Perl escape
     # (r'\c\e\g\h\i\j\k\m\o\p\q\y\z', 'ceghijkmopqyz', SUCCEED, 'found', 'ceghijkmopqyz'),
-    (r'\xff', '\377', SUCCEED, 'found', chr(255)),
     # new \x semantics
     (r'\x00ffffffffffffff', '\377', FAIL, 'found', chr(255)),
     (r'\x00f', '\017', FAIL, 'found', chr(15)),
@@ -273,124 +272,32 @@ tests = [
     # Test octal escapes/memory references
 
     ('\\1', 'a', SYNTAX_ERROR),
-    ('\\09', chr(0) + '9', SUCCEED, 'found', chr(0) + '9'),
-    ('\\141', 'a', SUCCEED, 'found', 'a'),
-    ('(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\\119', 'abcdefghijklk9', SUCCEED, 'found+"-"+g11', 'abcdefghijklk9-k'),
 
     # All tests from Perl
 
-    ('abc', 'abc', SUCCEED, 'found', 'abc'),
-    ('abc', 'xbc', FAIL),
-    ('abc', 'axc', FAIL),
-    ('abc', 'abx', FAIL),
-    ('abc', 'xabcy', SUCCEED, 'found', 'abc'),
-    ('abc', 'ababc', SUCCEED, 'found', 'abc'),
-    ('ab*c', 'abc', SUCCEED, 'found', 'abc'),
-    ('ab*bc', 'abc', SUCCEED, 'found', 'abc'),
-    ('ab*bc', 'abbc', SUCCEED, 'found', 'abbc'),
-    ('ab*bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
     ('ab{0,}bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
-    ('ab+bc', 'abbc', SUCCEED, 'found', 'abbc'),
-    ('ab+bc', 'abc', FAIL),
-    ('ab+bc', 'abq', FAIL),
     ('ab{1,}bc', 'abq', FAIL),
-    ('ab+bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
     ('ab{1,}bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
     ('ab{1,3}bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
     ('ab{3,4}bc', 'abbbbc', SUCCEED, 'found', 'abbbbc'),
     ('ab{4,5}bc', 'abbbbc', FAIL),
-    ('ab?bc', 'abbc', SUCCEED, 'found', 'abbc'),
-    ('ab?bc', 'abc', SUCCEED, 'found', 'abc'),
     ('ab{0,1}bc', 'abc', SUCCEED, 'found', 'abc'),
-    ('ab?bc', 'abbbbc', FAIL),
-    ('ab?c', 'abc', SUCCEED, 'found', 'abc'),
     ('ab{0,1}c', 'abc', SUCCEED, 'found', 'abc'),
-    ('^abc$', 'abc', SUCCEED, 'found', 'abc'),
-    ('^abc$', 'abcc', FAIL),
-    ('^abc', 'abcc', SUCCEED, 'found', 'abc'),
-    ('^abc$', 'aabc', FAIL),
-    ('abc$', 'aabc', SUCCEED, 'found', 'abc'),
     ('^', 'abc', SUCCEED, 'found', ''),
     ('$', 'abc', SUCCEED, 'found', ''),
-    ('a.c', 'abc', SUCCEED, 'found', 'abc'),
-    ('a.c', 'axc', SUCCEED, 'found', 'axc'),
-    ('a.*c', 'axyzc', SUCCEED, 'found', 'axyzc'),
-    ('a.*c', 'axyzd', FAIL),
-    ('a[bc]d', 'abc', FAIL),
-    ('a[bc]d', 'abd', SUCCEED, 'found', 'abd'),
-    ('a[b-d]e', 'abd', FAIL),
-    ('a[b-d]e', 'ace', SUCCEED, 'found', 'ace'),
-    ('a[b-d]', 'aac', SUCCEED, 'found', 'ac'),
-    ('a[-b]', 'a-', SUCCEED, 'found', 'a-'),
     ('a[b-]', 'a-', SUCCEED, 'found', 'a-'),
     ('a[b-a]', '-', SYNTAX_ERROR),
-    ('a[]b', '-', SYNTAX_ERROR),
-    ('a[', '-', SYNTAX_ERROR),
-    ('a]', 'a]', SUCCEED, 'found', 'a]'),
-    ('a[]]b', 'a]b', SUCCEED, 'found', 'a]b'),
-    ('a[^bc]d', 'aed', SUCCEED, 'found', 'aed'),
-    ('a[^bc]d', 'abd', FAIL),
-    ('a[^-b]c', 'adc', SUCCEED, 'found', 'adc'),
-    ('a[^-b]c', 'a-c', FAIL),
-    ('a[^]b]c', 'a]c', FAIL),
-    ('a[^]b]c', 'adc', SUCCEED, 'found', 'adc'),
-    ('ab|cd', 'abc', SUCCEED, 'found', 'ab'),
-    ('ab|cd', 'abcd', SUCCEED, 'found', 'ab'),
-    ('()ef', 'def', SUCCEED, 'found+"-"+g1', 'ef-'),
     ('*a', '-', SYNTAX_ERROR),
     ('(*)b', '-', SYNTAX_ERROR),
-    ('$b', 'b', FAIL),
-    ('a\\', '-', SYNTAX_ERROR),
-    ('a\\(b', 'a(b', SUCCEED, 'found+"-"+g1', 'a(b-Error'),
-    ('a\\(*b', 'ab', SUCCEED, 'found', 'ab'),
-    ('a\\(*b', 'a((b', SUCCEED, 'found', 'a((b'),
-    ('a\\\\b', 'a\\b', SUCCEED, 'found', 'a\\b'),
-    ('abc)', '-', SYNTAX_ERROR),
-    ('(abc', '-', SYNTAX_ERROR),
-    ('((a))', 'abc', SUCCEED, 'found+"-"+g1+"-"+g2', 'a-a-a'),
-    ('(a)b(c)', 'abc', SUCCEED, 'found+"-"+g1+"-"+g2', 'abc-a-c'),
-    ('a+b+c', 'aabbabc', SUCCEED, 'found', 'abc'),
     ('a{1,}b{1,}c', 'aabbabc', SUCCEED, 'found', 'abc'),
     ('a**', '-', SYNTAX_ERROR),
     ('a.+?c', 'abcabc', SUCCEED, 'found', 'abc'),
-    ('(a+|b)*', 'ab', SUCCEED, 'found+"-"+g1', 'ab-b'),
     ('(a+|b){0,}', 'ab', SUCCEED, 'found+"-"+g1', 'ab-b'),
-    ('(a+|b)+', 'ab', SUCCEED, 'found+"-"+g1', 'ab-b'),
     ('(a+|b){1,}', 'ab', SUCCEED, 'found+"-"+g1', 'ab-b'),
-    ('(a+|b)?', 'ab', SUCCEED, 'found+"-"+g1', 'a-a'),
     ('(a+|b){0,1}', 'ab', SUCCEED, 'found+"-"+g1', 'a-a'),
-    (')(', '-', SYNTAX_ERROR),
-    ('[^ab]*', 'cde', SUCCEED, 'found', 'cde'),
-    ('abc', '', FAIL),
-    ('a*', '', SUCCEED, 'found', ''),
     ('([abc])*d', 'abbbcd', SUCCEED, 'found+"-"+g1', 'abbbcd-c'),
     ('([abc])*bcd', 'abcd', SUCCEED, 'found+"-"+g1', 'abcd-a'),
-    ('a|b|c|d|e', 'e', SUCCEED, 'found', 'e'),
-    ('(a|b|c|d|e)f', 'ef', SUCCEED, 'found+"-"+g1', 'ef-e'),
-    ('abcd*efg', 'abcdefg', SUCCEED, 'found', 'abcdefg'),
-    ('ab*', 'xabyabbbz', SUCCEED, 'found', 'ab'),
-    ('ab*', 'xayabbbz', SUCCEED, 'found', 'a'),
-    ('(ab|cd)e', 'abcde', SUCCEED, 'found+"-"+g1', 'cde-cd'),
-    ('[abhgefdc]ij', 'hij', SUCCEED, 'found', 'hij'),
     ('^(ab|cd)e', 'abcde', FAIL),
-    ('(abc|)ef', 'abcdef', SUCCEED, 'found+"-"+g1', 'ef-'),
-    ('(a|b)c*d', 'abcd', SUCCEED, 'found+"-"+g1', 'bcd-b'),
-    ('(ab|ab*)bc', 'abc', SUCCEED, 'found+"-"+g1', 'abc-a'),
-    ('a([bc]*)c*', 'abc', SUCCEED, 'found+"-"+g1', 'abc-bc'),
-    ('a([bc]*)(c*d)', 'abcd', SUCCEED, 'found+"-"+g1+"-"+g2', 'abcd-bc-d'),
-    ('a([bc]+)(c*d)', 'abcd', SUCCEED, 'found+"-"+g1+"-"+g2', 'abcd-bc-d'),
-    ('a([bc]*)(c+d)', 'abcd', SUCCEED, 'found+"-"+g1+"-"+g2', 'abcd-b-cd'),
-    ('a[bcd]*dcdcde', 'adcdcde', SUCCEED, 'found', 'adcdcde'),
-    ('a[bcd]+dcdcde', 'adcdcde', FAIL),
-    ('(ab|a)b*c', 'abc', SUCCEED, 'found+"-"+g1', 'abc-ab'),
-    ('((a)(b)c)(d)', 'abcd', SUCCEED, 'g1+"-"+g2+"-"+g3+"-"+g4', 'abc-a-b-d'),
-    ('[a-zA-Z_][a-zA-Z0-9_]*', 'alpha', SUCCEED, 'found', 'alpha'),
-    ('^a(bc+|b[eh])g|.h$', 'abh', SUCCEED, 'found+"-"+g1', 'bh-None'),
-    ('(bc+d$|ef*g.|h?i(j|k))', 'effgz', SUCCEED, 'found+"-"+g1+"-"+g2', 'effgz-effgz-None'),
-    ('(bc+d$|ef*g.|h?i(j|k))', 'ij', SUCCEED, 'found+"-"+g1+"-"+g2', 'ij-ij-j'),
-    ('(bc+d$|ef*g.|h?i(j|k))', 'effg', FAIL),
-    ('(bc+d$|ef*g.|h?i(j|k))', 'bcdd', FAIL),
-    ('(bc+d$|ef*g.|h?i(j|k))', 'reffgz', SUCCEED, 'found+"-"+g1+"-"+g2', 'effgz-effgz-None'),
     ('((((((((((a))))))))))', 'a', SUCCEED, 'g10', 'a'),
     ('((((((((((a))))))))))\\10', 'aa', SUCCEED, 'found', 'aa'),
 # Python does not have the same rules for \\41 so this is a syntax error
@@ -398,15 +305,6 @@ tests = [
 #    ('((((((((((a))))))))))\\41', 'a!', SUCCEED, 'found', 'a!'),
     ('((((((((((a))))))))))\\41', '', SYNTAX_ERROR),
     ('(?i)((((((((((a))))))))))\\41', '', SYNTAX_ERROR),
-    ('(((((((((a)))))))))', 'a', SUCCEED, 'found', 'a'),
-    ('multiple words of text', 'uh-uh', FAIL),
-    ('multiple words', 'multiple words, yeah', SUCCEED, 'found', 'multiple words'),
-    ('(.*)c(.*)', 'abcde', SUCCEED, 'found+"-"+g1+"-"+g2', 'abcde-ab-de'),
-    ('\\((.*), (.*)\\)', '(a, b)', SUCCEED, 'g2+"-"+g1', 'b-a'),
-    ('[k]', 'ab', FAIL),
-    ('a[-]?c', 'ac', SUCCEED, 'found', 'ac'),
-    ('(abc)\\1', 'abcabc', SUCCEED, 'g1', 'abc'),
-    ('([a-c]*)\\1', 'abcabc', SUCCEED, 'g1', 'abc'),
     ('(?i)abc', 'ABC', SUCCEED, 'found', 'ABC'),
     ('(?i)abc', 'XBC', FAIL),
     ('(?i)abc', 'AXC', FAIL),
@@ -546,7 +444,6 @@ tests = [
     ('a(?:b|c|d)*(.)', 'ace', SUCCEED, 'g1', 'e'),
     ('a(?:b|c|d)+?(.)', 'ace', SUCCEED, 'g1', 'e'),
     ('a(?:b|(c|e){1,2}?|d)+?(.)', 'ace', SUCCEED, 'g1 + g2', 'ce'),
-    ('^(.+)?B', 'AB', SUCCEED, 'g1', 'A'),
 
     # lookbehind: split by : but not if it is escaped by -.
     ('(?<!-):(.*?)(?<!-):', 'a:bc-:de:f', SUCCEED, 'g1', 'bc-:de' ),
@@ -586,10 +483,7 @@ xyz""", SUCCEED, 'found', 'abc'),
 xyzabc
 123""", SUCCEED, 'found', 'abc'),
 
-    # using the s embedded pattern modifier
 
-    ('a.b', 'a\nb', FAIL),
-    ('(?s)a.b', 'a\nb', SUCCEED, 'found', 'a\nb'),
 
     # test \w, etc. both inside and outside character classes