diff --git a/uncompyle6/scanner.py b/uncompyle6/scanner.py
index ee3e73bd1..1cee91300 100644
--- a/uncompyle6/scanner.py
+++ b/uncompyle6/scanner.py
@@ -597,25 +597,14 @@ def setTokenClass(self, tokenClass: Token) -> Token:
         return self.Token
 
 
-# TODO: after the next xdis release, use from there instead.
-def parse_fn_counts_30_35(argc: int) -> Tuple[int, int, int]:
+def prefer_double_quote(string: str) -> str:
     """
-    In Python 3.0 to 3.5 MAKE_CLOSURE and MAKE_FUNCTION encode
-    arguments counts of positional, default + named, and annotation
-    arguments a particular kind of encoding where each of
-    the entry a a packed byted value of the lower 24 bits
-    of ``argc``.  The high bits of argc may have come from
-    an EXTENDED_ARG instruction. Here, we unpack the values
-    from the ``argc`` int and return a triple of the
-    positional args, named_args, and annotation args.
+    Prefer a double quoted string over a
+    single quoted string when possible
     """
-    annotate_count = (argc >> 16) & 0x7FFF
-    # For some reason that I don't understand, annotate_args is off by one
-    # when there is an EXENDED_ARG instruction from what is documented in
-    # https://docs.python.org/3.4/library/dis.html#opcode-MAKE_CLOSURE
-    if annotate_count > 1:
-        annotate_count -= 1
-    return ((argc & 0xFF), (argc >> 8) & 0xFF, annotate_count)
+    if string.find("'") == -1:
+        return f'"{string}"'
+    return str(string)
 
 
 def get_scanner(version: Union[str, tuple], is_pypy=False, show_asm=None) -> Scanner:
diff --git a/uncompyle6/scanners/scanner3.py b/uncompyle6/scanners/scanner3.py
index 4b871c525..7058cbac4 100644
--- a/uncompyle6/scanners/scanner3.py
+++ b/uncompyle6/scanners/scanner3.py
@@ -44,8 +44,9 @@
 import xdis.opcodes.opcode_33 as op3
 from xdis import Instruction, instruction_size, iscode
 from xdis.bytecode import _get_const_info
+from xdis.opcodes.opcode_3x import parse_fn_counts_30_35
 
-from uncompyle6.scanner import CONST_COLLECTIONS, Scanner, parse_fn_counts_30_35
+from uncompyle6.scanner import CONST_COLLECTIONS, Scanner, prefer_double_quote
 from uncompyle6.scanners.tok import Token
 from uncompyle6.util import get_code_name
 
@@ -611,6 +612,7 @@ def ingest(
                     pattr = "<code_object " + co_name + ">"
                 elif isinstance(const, str):
                     opname = "LOAD_STR"
+                    pattr = prefer_double_quote(inst.argval)
                 else:
                     if isinstance(inst.arg, int) and inst.arg < len(co.co_consts):
                         argval, _ = _get_const_info(inst.arg, co.co_consts)
diff --git a/uncompyle6/scanners/scanner37base.py b/uncompyle6/scanners/scanner37base.py
index 01ded28a1..257fc79f3 100644
--- a/uncompyle6/scanners/scanner37base.py
+++ b/uncompyle6/scanners/scanner37base.py
@@ -39,7 +39,7 @@
 from xdis import Instruction, instruction_size, iscode
 from xdis.bytecode import _get_const_info
 
-from uncompyle6.scanner import Scanner, Token
+from uncompyle6.scanner import Scanner, Token, prefer_double_quote
 
 globals().update(op3.opmap)
 
@@ -386,6 +386,7 @@ def tokens_append(j, token):
                     pattr = "<code_object " + const.co_name + ">"
                 elif isinstance(const, str):
                     opname = "LOAD_STR"
+                    pattr = prefer_double_quote(inst.argval)
                 else:
                     if isinstance(inst.arg, int) and inst.arg < len(co.co_consts):
                         argval, _ = _get_const_info(inst.arg, co.co_consts)
diff --git a/uncompyle6/semantics/n_actions.py b/uncompyle6/semantics/n_actions.py
index 2c3a6b698..ea7a923b6 100644
--- a/uncompyle6/semantics/n_actions.py
+++ b/uncompyle6/semantics/n_actions.py
@@ -39,6 +39,7 @@ def __init__(self):
         # parenthesis surrounding it. A high value indicates no
         # parenthesis are needed.
         self.prec = 1000
+        self.in_format_string = False
 
     def n_alias(self, node):
         if self.version <= (2, 1):