diff --git a/Dockerfile-2.7 b/Dockerfile-2.7
index f511194..3e643f0 100644
--- a/Dockerfile-2.7
+++ b/Dockerfile-2.7
@@ -2,6 +2,6 @@
 From python:2.7-onbuild
 Maintainer J. Fernando Sánchez @balkian
 
-RUN pip install -e "/usr/src/app/[server]"
+RUN pip install ".[server]"
 
 ENTRYPOINT ["bitter"]
diff --git a/Makefile b/Makefile
index d61b5a4..7b934c6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PYVERSIONS=3.4 2.7
+PYVERSIONS=3.5
 PYMAIN=$(firstword $(PYVERSIONS))
 NAME=bitter
 REPO=balkian
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 417f1d4..ead73a9 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -48,13 +48,13 @@ class TestUtils(TestCase):
             time.sleep(0.5)
             return i
         tic = time.time()
-        resp = utils.parallel(echo, [1,2,3])
+        resp = utils.parallel(echo, [1, 2, 3])
         assert isinstance(resp, types.GeneratorType)
-        assert list(resp) == [1,2,3]
+        assert sorted(list(resp)) == [1, 2, 3]
         toc = time.time()
         assert (tic-toc) < 600
         resp2 = utils.parallel(echo, [1,2,3,4], chunksize=2)
-        assert list(resp2) == [1,2, 3,4]
+        assert sorted(list(resp2)) == [1, 2, 3, 4]
 
 
 class TestUtilsEnv(TestUtils):