diff --git a/qubes/tests/__init__.py b/qubes/tests/__init__.py
index 6fe0513a..876118fa 100644
--- a/qubes/tests/__init__.py
+++ b/qubes/tests/__init__.py
@@ -37,6 +37,7 @@ import functools
 import logging
 import os
 import pathlib
+import shlex
 import shutil
 import subprocess
 import sys
@@ -962,6 +963,16 @@ class SystemTestsMixin(object):
             shutil.rmtree(mountpoint)
             subprocess.check_call(['sudo', 'losetup', '-d', loopdev])
 
+    def create_local_file(self, filename, content, mode='w'):
+        with open(filename, mode) as file:
+            file.write(content)
+        self.addCleanup(os.unlink, filename)
+
+    def create_remote_file(self, vm, filename, content):
+        self.loop.run_until_complete(vm.run_for_stdio(
+            'cat > {}'.format(shlex.quote(filename)),
+            user='root', input=content.encode('utf-8')))
+
 
 def load_tests(loader, tests, pattern): # pylint: disable=unused-argument
     # discard any tests from this module, because it hosts base classes
diff --git a/qubes/tests/integ/vm_qrexec_gui.py b/qubes/tests/integ/vm_qrexec_gui.py
index 2883a0e6..219e2cf9 100644
--- a/qubes/tests/integ/vm_qrexec_gui.py
+++ b/qubes/tests/integ/vm_qrexec_gui.py
@@ -20,21 +20,17 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 #
 
-from distutils import spawn
-
 import asyncio
 import multiprocessing
 import os
-import shlex
 import subprocess
-import time
 import unittest
+from distutils import spawn
 
 import qubes.config
 import qubes.tests
 import qubes.vm.appvm
 import qubes.vm.templatevm
-import re
 
 TEST_DATA = b"0123456789" * 1024
 
@@ -59,16 +55,6 @@ class TC_00_AppVMMixin(qubes.tests.SystemTestsMixin):
         self.loop.run_until_complete(self.testvm2.create_on_disk())
         self.app.save()
 
-    def create_local_file(self, filename, content, mode='w'):
-        with open(filename, mode) as file:
-            file.write(content)
-        self.addCleanup(os.unlink, filename)
-
-    def create_remote_file(self, vm, filename, content):
-        self.loop.run_until_complete(vm.run_for_stdio(
-            'cat > {}'.format(shlex.quote(filename)),
-            user='root', input=content.encode('utf-8')))
-
     def test_000_start_shutdown(self):
         # TODO: wait_for, timeout
         self.loop.run_until_complete(self.testvm1.start())
diff --git a/tests/pvgrub.py b/tests/pvgrub.py
index 5467d2a3..9dcc27be 100644
--- a/tests/pvgrub.py
+++ b/tests/pvgrub.py
@@ -169,4 +169,4 @@ def load_tests(loader, tests, pattern):
                 'TC_40_PVGrub_' + template,
                 (TC_40_PVGrub, qubes.tests.QubesTestCase),
                 {'template': template})))
-    return tests
\ No newline at end of file
+    return tests