The usual.
diff --git a/Lib/dos-8x3/test_str.py b/Lib/dos-8x3/test_str.py
index 6e321e9..7f5cb80 100644
--- a/Lib/dos-8x3/test_str.py
+++ b/Lib/dos-8x3/test_str.py
@@ -1,15 +1,134 @@
-# Tests StringIO and cStringIO
+#! /usr/bin/env python
 
-import string
+# Sanity checker for time.strftime
 
-def do_test(module):
-    s = (string.letters+'\n')*5
-    f = module.StringIO(s)
-    print f.read(10)
-    print f.readline()
-    print len(f.readlines(60))
+import time, calendar, sys, string, os, re
+from test_support import verbose
 
-# Don't bother testing cStringIO without
-import StringIO, cStringIO
-do_test(StringIO)
-do_test(cStringIO)
+def main():
+    global verbose
+    now = time.time()
+    strftest(now)
+    verbose = 0
+    # Try a bunch of dates and times,  chosen to vary through time of
+    # day and daylight saving time
+    for j in range(-5, 5):
+        for i in range(25):
+            strftest(now + (i + j*100)*23*3603)
+
+def strftest(now):
+    if verbose:
+        print "strftime test for", time.ctime(now)
+    nowsecs = str(long(now))[:-1]
+    gmt = time.gmtime(now)
+    now = time.localtime(now)
+
+    if now[3] < 12: ampm='(AM|am)'
+    else: ampm='(PM|pm)'
+
+    jan1 = time.localtime(time.mktime((now[0], 1, 1) + (0,)*6))
+
+    try:
+        if now[8]: tz = time.tzname[1]
+        else: tz = time.tzname[0]
+    except AttributeError:
+        tz = ''
+
+    if now[3] > 12: clock12 = now[3] - 12
+    elif now[3] > 0: clock12 = now[3]
+    else: clock12 = 12
+
+    expectations = (
+        ('%a', calendar.day_abbr[now[6]], 'abbreviated weekday name'),
+        ('%A', calendar.day_name[now[6]], 'full weekday name'),
+        ('%b', calendar.month_abbr[now[1]], 'abbreviated month name'),
+        ('%B', calendar.month_name[now[1]], 'full month name'),
+        # %c see below
+        ('%d', '%02d' % now[2], 'day of month as number (00-31)'),
+        ('%H', '%02d' % now[3], 'hour (00-23)'),
+        ('%I', '%02d' % clock12, 'hour (01-12)'),
+        ('%j', '%03d' % now[7], 'julian day (001-366)'),
+        ('%m', '%02d' % now[1], 'month as number (01-12)'),
+        ('%M', '%02d' % now[4], 'minute, (00-59)'),
+        ('%p', ampm, 'AM or PM as appropriate'),
+        ('%S', '%02d' % now[5], 'seconds of current time (00-60)'),
+        ('%U', '%02d' % ((now[7] + jan1[6])/7),
+         'week number of the year (Sun 1st)'),
+        ('%w', '0?%d' % ((1+now[6]) % 7), 'weekday as a number (Sun 1st)'),
+        ('%W', '%02d' % ((now[7] + (jan1[6] - 1)%7)/7),
+         'week number of the year (Mon 1st)'),
+        # %x see below
+        ('%X', '%02d:%02d:%02d' % (now[3], now[4], now[5]), '%H:%M:%S'),
+        ('%y', '%02d' % (now[0]%100), 'year without century'),
+        ('%Y', '%d' % now[0], 'year with century'),
+        # %Z see below
+        ('%%', '%', 'single percent sign'),
+        )
+
+    nonstandard_expectations = (
+        # These are standard but don't have predictable output
+        ('%c', fixasctime(time.asctime(now)), 'near-asctime() format'),
+        ('%x', '%02d/%02d/%02d' % (now[1], now[2], (now[0]%100)),
+         '%m/%d/%y %H:%M:%S'),
+        ('%Z', '%s' % tz, 'time zone name'),
+
+        # These are some platform specific extensions
+        ('%D', '%02d/%02d/%02d' % (now[1], now[2], (now[0]%100)), 'mm/dd/yy'),
+        ('%e', '%2d' % now[2], 'day of month as number, blank padded ( 0-31)'),
+        ('%h', calendar.month_abbr[now[1]], 'abbreviated month name'),
+        ('%k', '%2d' % now[3], 'hour, blank padded ( 0-23)'),
+        ('%n', '\n', 'newline character'),
+        ('%r', '%02d:%02d:%02d %s' % (clock12, now[4], now[5], ampm),
+         '%I:%M:%S %p'),
+        ('%R', '%02d:%02d' % (now[3], now[4]), '%H:%M'),
+        ('%s', nowsecs, 'seconds since the Epoch in UCT'),
+        ('%t', '\t', 'tab character'),
+        ('%T', '%02d:%02d:%02d' % (now[3], now[4], now[5]), '%H:%M:%S'),
+        ('%3y', '%03d' % (now[0]%100),
+         'year without century rendered using fieldwidth'),
+        )
+
+    if verbose:
+        print "Strftime test, platform: %s, Python version: %s" % \
+              (sys.platform, string.split(sys.version)[0])
+
+    for e in expectations:
+        try:
+            result = time.strftime(e[0], now)
+        except ValueError, error:
+            print "Standard '%s' format gave error:" % e[0], error
+            continue
+        if re.match(e[1], result): continue
+        if not result or result[0] == '%':
+            print "Does not support standard '%s' format (%s)" % (e[0], e[2])
+        else:
+            print "Conflict for %s (%s):" % (e[0], e[2])
+            print "  Expected %s, but got %s" % (e[1], result)
+
+    for e in nonstandard_expectations:
+        try:
+            result = time.strftime(e[0], now)
+        except ValueError, result:
+            if verbose:
+                print "Error for nonstandard '%s' format (%s): %s" % \
+                      (e[0], e[2], str(result))
+            continue
+        if re.match(e[1], result):
+            if verbose:
+                print "Supports nonstandard '%s' format (%s)" % (e[0], e[2])
+        elif not result or result[0] == '%':
+            if verbose:
+                print "Does not appear to support '%s' format (%s)" % (e[0],
+                                                                       e[2])
+        else:
+            if verbose:
+                print "Conflict for nonstandard '%s' format (%s):" % (e[0],
+                                                                      e[2])
+                print "  Expected %s, but got %s" % (e[1], result)
+
+def fixasctime(s):
+    if s[8] == ' ':
+        s = s[:8] + '0' + s[9:]
+    return s
+
+main()