diff --git a/.travis.yml b/.travis.yml
index 00eb629..22559b7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,6 +34,9 @@ matrix:
       env:
         - TOXENV=py36
         - WITH_GCOV=1
+    - python: pypy
+      env:
+        - TOXENV=pypy
     - python: 3.7-dev
       env:
         - TOXENV=py37
@@ -52,6 +55,8 @@ matrix:
      - env:
         - TOXENV=py37
         - WITH_GCOV=1
+     - env:
+        - TOXENV=pypy
 
 env:
     global:
diff --git a/tox.ini b/tox.ini
index 6d984c0..95fee06 100644
--- a/tox.ini
+++ b/tox.ini
@@ -46,6 +46,17 @@ passenv = {[testenv]passenv}
 setenv = {[testenv:py2-nosasltls]setenv}
 commands = {[testenv:py2-nosasltls]commands}
 
+[testenv:pypy]
+# PyPy doesn't have working setup.py test
+deps = pytest
+commands = {envpython} -m pytest
+
+[testenv:pypy35]
+# PyPy-5.9.0
+basepython = pypy3.5
+deps = {[testenv:pypy]deps}
+commands = {[testenv:pypy]commands}
+
 [testenv:coverage-report]
 deps = coverage
 skip_install = true