diff --git a/docs/source/tutorial/highlevel.rst b/docs/source/tutorial/highlevel.rst
index ffca472..fff47cb 100644
--- a/docs/source/tutorial/highlevel.rst
+++ b/docs/source/tutorial/highlevel.rst
@@ -1,8 +1,3 @@
-.. testsetup::
-
-    import sys
-    from pdfminer.high_level import extract_text_to_fp, extract_text
-
 .. _tutorial_highlevel:
 
 Extract text from a PDF using Python
@@ -15,6 +10,7 @@ The most simple way to extract text from a PDF is to use
 
 .. doctest::
 
+    >>> from pdfminer.high_level import extract_text
     >>> text = extract_text('samples/simple1.pdf')
     >>> print(repr(text))
     'Hello \n\nWorld\n\nHello \n\nWorld\n\nH e l l o  \n\nW o r l d\n\nH e l l o  \n\nW o r l d\n\n\x0c'
@@ -42,10 +38,8 @@ To read text from a PDF and print it on the command line:
 
 .. doctest::
 
-    >>> if sys.version_info > (3, 0):
-    ...     from io import StringIO
-    ... else:
-    ...     from io import BytesIO as StringIO
+    >>> from io import StringIO
+    >>> from pdfminer.high_level import extract_text_to_fp
     >>> output_string = StringIO()
     >>> with open('samples/simple1.pdf', 'rb') as fin:
     ...     extract_text_to_fp(fin, output_string)
@@ -56,10 +50,8 @@ Or to convert it to html and use layout analysis:
 
 .. doctest::
 
-    >>> if sys.version_info > (3, 0):
-    ...     from io import StringIO
-    ... else:
-    ...     from io import BytesIO as StringIO
+    >>> from io import StringIO
+    >>> from pdfminer.high_level import extract_text_to_fp
     >>> from pdfminer.layout import LAParams
     >>> output_string = StringIO()
     >>> with open('samples/simple1.pdf', 'rb') as fin:
diff --git a/pdfminer/converter.py b/pdfminer/converter.py
index 4b2b62e..de58f30 100644
--- a/pdfminer/converter.py
+++ b/pdfminer/converter.py
@@ -1,7 +1,6 @@
 import io
 import logging
 import re
-import sys
 
 from . import utils
 from .layout import LTChar
@@ -279,8 +278,6 @@ class HTMLConverter(PDFConverter):
     def write(self, text):
         if self.codec:
             text = text.encode(self.codec)
-        if sys.version_info < (3, 0):
-            text = str(text)
         self.outfp.write(text)
         return
 
diff --git a/tools/dumppdf.py b/tools/dumppdf.py
index 8baddc8..8724c81 100755
--- a/tools/dumppdf.py
+++ b/tools/dumppdf.py
@@ -66,7 +66,8 @@ def dumpxml(out, obj, codec=None):
             out.write('\n</props>\n')
             if codec == 'text':
                 data = obj.get_data()
-                out.write('<data size="%d">%s</data>\n' % (len(data), escape(data)))
+                out.write('<data size="%d">%s</data>\n'
+                          % (len(data), escape(data)))
             out.write('</stream>')
         return