diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..9d95e6ee
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,89 @@
+---
+version: 2.1
+
+executors:
+  python:
+    docker:
+      - image: cimg/python:3.9
+
+jobs:
+  flake8_lint:
+    executor: python
+    steps:
+      - checkout
+      - run: pip install tox
+      - run: tox -e flake8
+  isort_lint:
+    executor: python
+    steps:
+      - checkout
+      - run: pip install tox
+      - run: tox -e isort
+  test:
+    parameters:
+      python:
+        type: string
+    docker:
+      - image: circleci/python:<< parameters.python >>
+    environment:
+      TOXENV: "py<< parameters.python >>"
+    steps:
+      - checkout
+      - run: echo 'export PATH=$HOME/.local/bin:$PATH' >> $BASH_ENV
+      - run: pip install --user tox
+      - run: tox
+  test_nooptionals:
+    parameters:
+      python:
+        type: string
+    docker:
+      - image: cimg/python:<< parameters.python >>
+    environment:
+      TOXENV: "py<< parameters.python >>-nooptionals"
+    steps:
+      - checkout
+      - run: pip install tox
+      - run: tox
+  test_pypy:
+    parameters:
+      python:
+        type: string
+    docker:
+      - image: pypy:<< parameters.python >>
+    environment:
+      TOXENV: "pypy<< parameters.python >>"
+    steps:
+      - checkout
+      - run: pip install tox
+      - run: tox
+   
+
+workflows:
+  version: 2
+  client_python:
+    jobs:
+      - flake8_lint
+      - isort_lint
+      - test:
+          matrix:
+            parameters:
+               python:
+                 - "2.7"
+                 - "3.4"
+                 - "3.5"
+                 - "3.6"
+                 - "3.7"
+                 - "3.8"
+                 - "3.9"
+      - test_nooptionals:
+          matrix:
+            parameters:
+               python:
+                 - "2.7"
+                 - "3.9"
+      - test_pypy:
+          matrix:
+            parameters:
+               python:
+                 - "2.7"
+                 - "3.7"
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6d254710..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,64 +0,0 @@
-os: linux
-dist: xenial
-cache:
-  directories:
-    - $HOME/.cache/pip
-
-language: python
-
-jobs:
-  include:
-    - stage: lint
-      name: flake8_lint
-      script: 
-        - tox -e flake8 
-    - stage: lint
-      name: isort_lint
-      script: 
-        - tox -e isort
-    - stage: test
-      python: "2.6"
-      env: TOXENV=py26
-      dist: trusty
-    - stage: test
-      python: "2.7"
-      env: TOXENV=py27
-    - stage: test
-      python: "2.7"
-      env: TOXENV=py27-nooptionals
-    - stage: test
-      python: "3.4"
-      env: TOXENV=py34
-    - stage: test
-      python: "3.5"
-      env: TOXENV=py35
-    - stage: test
-      python: "3.6"
-      env: TOXENV=py36
-    - stage: test
-      python: "3.7"
-      env: TOXENV=py37
-    - stage: test
-      python: "3.8"
-      env: TOXENV=py38
-    - stage: test
-      python: "3.9"
-      env: TOXENV=py39
-    - stage: test
-      python: "3.9"
-      env: TOXENV=py39-nooptionals
-    - stage: test
-      python: "pypy"
-      env: TOXENV=pypy
-    - stage: test
-      python: "pypy3"
-      env: TOXENV=pypy3
-
-install:
-  - pip install tox
-
-script:
-  - tox
-
-notifications:
-  email: false
diff --git a/setup.py b/setup.py
index 8327e508..edf55f7a 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
         'twisted': ['twisted'],
     },
     test_suite="tests",
-    python_requires=">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
@@ -39,7 +39,6 @@
         "Intended Audience :: System Administrators",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
diff --git a/tox.ini b/tox.ini
index 21dd09fb..a84275b0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = coverage-clean,py26,py27,py34,py35,py36,py37,py38,py39,pypy,pypy3,{py27,py39}-nooptionals,coverage-report,flake8,isort
+envlist = coverage-clean,py2.7,py3.4,py3.5,py3.6,py3.7,py3.8,py3.9,pypy2.7,pypy3.7,{py2.7,py3.9}-nooptionals,coverage-report,flake8,isort
 
 
 [base]
@@ -7,21 +7,12 @@ deps =
     coverage
     pytest
 
-[testenv:py26]
-; Last pytest and py version supported on py26 .
-deps =
-  unittest2
-  py==1.4.31
-  pytest==2.9.2
-  coverage
-  futures
-
-[testenv:py27]
+[testenv:py2.7]
 deps =
     {[base]deps}
     futures
 
-[testenv:pypy]
+[testenv:pypy2.7]
 deps =
     {[base]deps}
     futures
@@ -29,18 +20,18 @@ deps =
 [testenv]
 deps =
     {[base]deps}
-    {py27,py37,pypy,pypy3}: twisted
-    {py37,pypy3}: asgiref
+    {py2.7,py3.7,pypy2.7,pypy3.7}: twisted
+    {py3.7,pypy3.7}: asgiref
 commands = coverage run --parallel -m pytest {posargs}
 
 ; Ensure test suite passes if no optional dependencies are present.
-[testenv:py27-nooptionals]
+[testenv:py2.7-nooptionals]
 deps = 
     {[base]deps}
     futures
 commands = coverage run --parallel -m pytest {posargs}
 
-[testenv:py39-nooptionals]
+[testenv:py3.9-nooptionals]
 commands = coverage run --parallel -m pytest {posargs}
 
 [testenv:coverage-clean]