diff --git a/pytest_flake8.py b/pytest_flake8.py
index 1e45d8f..5774714 100644
--- a/pytest_flake8.py
+++ b/pytest_flake8.py
@@ -2,12 +2,12 @@
 
 import os
 import re
+from contextlib import redirect_stdout, redirect_stderr
+from io import BytesIO, TextIOWrapper
 
 from flake8.main import application
 from flake8.options import config
 
-import py
-
 import pytest
 
 __version__ = '0.6'
@@ -116,15 +116,22 @@ def setup(self):
             pytest.skip("file(s) previously passed FLAKE8 checks")
 
     def runtest(self):
-        call = py.io.StdCapture.call
-        found_errors, out, err = call(
-            check_file,
-            self.fspath,
-            self.flake8ignore,
-            self.maxlength,
-            self.maxcomplexity,
-            self.showshource,
-            self.statistics)
+        with BytesIO() as bo, TextIOWrapper(bo, encoding='utf-8') as to, \
+             BytesIO() as be, TextIOWrapper(be, encoding='utf-8') as te, \
+             redirect_stdout(to), redirect_stderr(te):
+            found_errors = check_file(
+                self.fspath,
+                self.flake8ignore,
+                self.maxlength,
+                self.maxcomplexity,
+                self.showshource,
+                self.statistics
+            )
+            to.flush()
+            te.flush()
+            out = bo.getvalue().decode('utf-8')
+            err = be.getvalue().decode('utf-8')
+
         if found_errors:
             raise Flake8Error(out, err)
         # update mtime only if test passed
diff --git a/setup.py b/setup.py
index 50e91c9..1dfdf3c 100644
--- a/setup.py
+++ b/setup.py
@@ -14,13 +14,13 @@
         "Intended Audience :: Developers",
         "License :: OSI Approved :: BSD License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Software Development",
diff --git a/tox.ini b/tox.ini
index 12da49e..343cfdd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist=py27,py36-pytesttrunk,py36-xdist,py34,py35,py36,py37,py38,pypy,pypy3
+envlist=py36-pytesttrunk,py36-xdist,py35,py36,py37,py38,py39,py310,pypy,pypy3
 
 [testenv]
 deps=pytest