diff --git a/CHANGELOG b/CHANGELOG
index 9c5ed3f..1f02922 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 v0.6 (unreleased):
 
+- Dropped support for end-of-life Python versions 2.6, 3.2, 3.3. (#199, #204)
 - Fixed <wbr> not being considered a single-only tag. (#200)
 
 v0.5.1 (released March 3, 2018):
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 064ffe2..9924fac 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -7,6 +7,9 @@ v0.6
 Unreleased
 (`changes <https://github.com/earwig/mwparserfromhell/compare/v0.5.1...develop>`__):
 
+- Dropped support for end-of-life Python versions 2.6, 3.2, 3.3.
+  (`#199 <https://github.com/earwig/mwparserfromhell/issues/199>`,
+  `#204 <https://github.com/earwig/mwparserfromhell/pull/204>`)
 - Fixed `<wbr>` not being considered a single-only tag.
   (`#200 <https://github.com/earwig/mwparserfromhell/pull/200>`)
 
diff --git a/setup.py b/setup.py
index cb2491f..8f84eb5 100644
--- a/setup.py
+++ b/setup.py
@@ -76,13 +76,13 @@ if fallback:
 
 tokenizer = Extension("mwparserfromhell.parser._tokenizer",
                       sources=sorted(glob("mwparserfromhell/parser/ctokenizer/*.c")),
-                      depends=glob("mwparserfromhell/parser/ctokenizer/*.h"))
+                      depends=sorted(glob("mwparserfromhell/parser/ctokenizer/*.h")))
 
 setup(
     name = "mwparserfromhell",
     packages = find_packages(exclude=("tests",)),
     ext_modules = [tokenizer] if use_extension else [],
-    test_suite = "tests.discover",
+    test_suite = "tests",
     version = __version__,
     author = "Ben Kurtovic",
     author_email = "ben.kurtovic@gmail.com",
diff --git a/tests/_test_tokenizer.py b/tests/_test_tokenizer.py
index 187f5eb..c314df8 100644
--- a/tests/_test_tokenizer.py
+++ b/tests/_test_tokenizer.py
@@ -109,7 +109,7 @@ class TokenizerTestCase(object):
                 print(error.format(filename))
                 continue
             if data["input"] is None or data["output"] is None:
-                error = "Test '{0}' in '{1}' was ignored because it lacked an input or an output"
+                error = "Test '{}' in '{}' was ignored because it lacked an input or an output"
                 print(error.format(data["name"], filename))
                 continue
 
@@ -126,7 +126,7 @@ class TokenizerTestCase(object):
     def build(cls):
         """Load and install all tests from the 'tokenizer' directory."""
         def load_file(filename, restrict=None):
-            with codecs.open(filename, "rU", encoding="utf8") as fp:
+            with codecs.open(filename, "r", encoding="utf8") as fp:
                 text = fp.read()
                 name = path.split(filename)[1][:-len(extension)]
                 cls._load_tests(filename, name, text, restrict)
diff --git a/tests/discover.py b/tests/discover.py
deleted file mode 100644
index a41af83..0000000
--- a/tests/discover.py
+++ /dev/null
@@ -1,17 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-It appears the default distutils test suite doesn't play nice with
-``setUpClass`` thereby making some tests fail. Using ``unittest2`` to load
-tests seems to work around that issue.
-
-http://stackoverflow.com/a/17004409/753501
-"""
-
-import os.path
-
-import unittest
-
-def additional_tests():
-    project_root = os.path.split(os.path.dirname(__file__))[0]
-    return unittest.defaultTestLoader.discover(project_root)