diff --git a/newsfragments/3028.other b/newsfragments/3028.other
new file mode 100644
index 000000000..4381305b2
--- /dev/null
+++ b/newsfragments/3028.other
@@ -0,0 +1 @@
+Updated string literal syntax for Python3 compatibility.
diff --git a/src/allmydata/magicpath.py b/src/allmydata/magicpath.py
index d39289815..1f46330d4 100644
--- a/src/allmydata/magicpath.py
+++ b/src/allmydata/magicpath.py
@@ -1,14 +1,13 @@
-
 import re
 import os.path
 
 from allmydata.util.assertutil import precondition, _assert
 
 def path2magic(path):
-    return re.sub(ur'[/@]',  lambda m: {u'/': u'@_', u'@': u'@@'}[m.group(0)], path)
+    return re.sub(u'[/@]',  lambda m: {u'/': u'@_', u'@': u'@@'}[m.group(0)], path)
 
 def magic2path(path):
-    return re.sub(ur'@[_@]', lambda m: {u'@_': u'/', u'@@': u'@'}[m.group(0)], path)
+    return re.sub(u'@[_@]', lambda m: {u'@_': u'/', u'@@': u'@'}[m.group(0)], path)
 
 
 IGNORE_SUFFIXES = [u'.backup', u'.tmp', u'.conflict']
diff --git a/src/allmydata/scripts/runner.py b/src/allmydata/scripts/runner.py
index 935379ed4..327325e95 100644
--- a/src/allmydata/scripts/runner.py
+++ b/src/allmydata/scripts/runner.py
@@ -186,7 +186,7 @@ def _maybe_enable_eliot_logging(options, reactor):
     return options
 
 def run():
-    assert sys.version_info < (3,), ur"Tahoe-LAFS does not run under Python 3. Please use Python 2.7.x."
+    assert sys.version_info < (3,), u"Tahoe-LAFS does not run under Python 3. Please use Python 2.7.x."
 
     if sys.platform == "win32":
         from allmydata.windows.fixups import initialize
diff --git a/src/allmydata/util/encodingutil.py b/src/allmydata/util/encodingutil.py
index 11ab942b6..568267b35 100644
--- a/src/allmydata/util/encodingutil.py
+++ b/src/allmydata/util/encodingutil.py
@@ -118,7 +118,7 @@ def unicode_to_argv(s, mangle=False):
 
     if mangle and sys.platform == "win32":
         # This must be the same as 'mangle' in bin/tahoe-script.template.
-        return str(re.sub(ur'[^\x20-\x7F]', lambda m: u'\x7F%x;' % (ord(m.group(0)),), s))
+        return str(re.sub(u'[^\\x20-\\x7F]', lambda m: u'\x7F%x;' % (ord(m.group(0)),), s))
     else:
         return s.encode(io_encoding)
 
@@ -196,12 +196,12 @@ def _str_escape(m, quote_newlines):
     else:
         return '\\x%02x' % (ord(c),)
 
-MUST_DOUBLE_QUOTE_NL = re.compile(ur'[^\x20-\x26\x28-\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]', re.DOTALL)
-MUST_DOUBLE_QUOTE    = re.compile(ur'[^\n\x20-\x26\x28-\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]', re.DOTALL)
+MUST_DOUBLE_QUOTE_NL = re.compile(u'[^\\x20-\\x26\\x28-\\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]', re.DOTALL)
+MUST_DOUBLE_QUOTE    = re.compile(u'[^\\n\\x20-\\x26\\x28-\\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]', re.DOTALL)
 
 # if we must double-quote, then we have to escape ", $ and `, but need not escape '
-ESCAPABLE_UNICODE = re.compile(ur'([\uD800-\uDBFF][\uDC00-\uDFFF])|'  # valid surrogate pairs
-                               ur'[^ !#\x25-\x5B\x5D-\x5F\x61-\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]',
+ESCAPABLE_UNICODE = re.compile(u'([\uD800-\uDBFF][\uDC00-\uDFFF])|'  # valid surrogate pairs
+                               u'[^ !#\\x25-\\x5B\\x5D-\\x5F\\x61-\\x7E\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFC]',
                                re.DOTALL)
 
 ESCAPABLE_8BIT    = re.compile( r'[^ !#\x25-\x5B\x5D-\x5F\x61-\x7E]', re.DOTALL)
diff --git a/src/allmydata/windows/fixups.py b/src/allmydata/windows/fixups.py
index 29fb43da0..f2db8fb4c 100644
--- a/src/allmydata/windows/fixups.py
+++ b/src/allmydata/windows/fixups.py
@@ -217,7 +217,7 @@ def initialize():
     # Instead it "mangles" or escapes them using \x7F as an escape character, which we
     # unescape here.
     def unmangle(s):
-        return re.sub(ur'\x7F[0-9a-fA-F]*\;', lambda m: unichr(int(m.group(0)[1:-1], 16)), s)
+        return re.sub(u'\\x7F[0-9a-fA-F]*\\;', lambda m: unichr(int(m.group(0)[1:-1], 16)), s)
 
     try:
         argv = [unmangle(argv_unicode[i]).encode('utf-8') for i in xrange(0, argc.value)]