2 files changed, 1 insertions, 3 deletions
diff --git a/tests/util/test_file_consumer.py b/tests/util/test_file_consumer.py
index e90e08d1c0..8d6627ec33 100644
--- a/tests/util/test_file_consumer.py
+++ b/tests/util/test_file_consumer.py
@@ -15,9 +15,9 @@
 
 
 import threading
+from io import StringIO
 
 from mock import NonCallableMock
-from six import StringIO
 
 from twisted.internet import defer, reactor
 
diff --git a/tests/util/test_linearizer.py b/tests/util/test_linearizer.py
index ca3858b184..0e52811948 100644
--- a/tests/util/test_linearizer.py
+++ b/tests/util/test_linearizer.py
@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from six.moves import range
-
 from twisted.internet import defer, reactor
 from twisted.internet.defer import CancelledError