diff --git a/.travis.yml b/.travis.yml
index 296faef..eecae90 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,16 @@
 language: python
-dist: xenial
 python:
     - 2.7
     - 3.5
     - 3.6
     - 3.7
+    - 3.8
     - pypy
     - pypy3
+# Not yet, pending https://github.com/zopefoundation/zope.publisher/issues/49
+# env:
+#   global:
+#     - ZOPE_INTERFACE_STRICT_IRO: 1
 install:
     - pip install -U pip setuptools
     - pip install -U coverage coveralls
diff --git a/CHANGES.rst b/CHANGES.rst
index 9b3fad6..1c47060 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,8 @@
 
 - Drop support for Python 3.4.
 
+- Add support for Python 3.8.
+
 
 4.3.1 (2018-10-16)
 ==================
diff --git a/setup.py b/setup.py
index fb23f04..4e40833 100644
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,7 @@ def read(filename):
 
 setup(
     name='zope.traversing',
-    version='4.3.2.dev0',
+    version='4.4.0.dev0',
     url='https://github.com/zopefoundation/zope.traversing',
     license='ZPL 2.1',
     author='Zope Foundation and Contributors',
@@ -63,6 +63,7 @@ def read(filename):
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Natural Language :: English',
diff --git a/tox.ini b/tox.ini
index c22096d..5fef179 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,39 +1,38 @@
 [tox]
 envlist =
-    py27,py35,py36,py37,pypy,pypy3,coverage,docs
+    py27,py35,py36,py37,py38,pypy,pypy3,coverage,docs
 # Note: if you add new Python versions, please add them to
 # [testenv:coverage] depends as well!
 
 [testenv]
 usedevelop = true
 commands =
-    coverage run -m zope.testrunner --test-path=src []
+    coverage run -p -m zope.testrunner --test-path=src []
+extras =
+    test
 deps =
-    .[test]
     coverage
-setenv =
-   COVERAGE_FILE=.coverage.{envname}
+# Not yet, pending https://github.com/zopefoundation/zope.publisher/issues/49
+# setenv =
+#     ZOPE_INTERFACE_STRICT_IRO=1
 
 [testenv:coverage]
-setenv =
-  COVERAGE_FILE=.coverage
 skip_install = true
 commands =
     coverage erase
     coverage combine
-    coverage html
-    coverage xml
+    coverage html -i
+    coverage xml -i
     coverage report --fail-under=100 --show-missing
 # parallel mode: make sure all builds complete before we run this one
 depends =
-    py27,py35,py36,py37,pypy,pypy3
+    py27,py35,py36,py37,py38,pypy,pypy3
 parallel_show_output = true
 
 [testenv:docs]
 basepython =
-    python3.6
+    python3
 commands =
     sphinx-build -b html -d docs/_build/doctrees docs docs/_build/html
-deps =
-    {[testenv]deps}
-    .[docs]
+extras =
+    docs