diff --git a/.travis.yml b/.travis.yml
index be060c6..ef9d669 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,7 @@ env:
 - TOXENV=py-pytest30
 - TOXENV=py-pytest31
 - TOXENV=py-pytest32
+- TOXENV=py-pytest33
 
 install: pip install tox setuptools_scm
 script: tox
diff --git a/appveyor.yml b/appveyor.yml
index 0173af9..3c387e6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,12 +1,12 @@
 environment:
   matrix:
   # note: please use "tox --listenvs" to populate the build matrix
-  - TOXENV: "py27-pytest30"
-  - TOXENV: "py34-pytest30"
-  - TOXENV: "py35-pytest30"
-  - TOXENV: "py36-pytest30"
-  - TOXENV: "py27-pytest30-pexpect"
-  - TOXENV: "py35-pytest30-pexpect"
+  - TOXENV: "py27-pytest33"
+  - TOXENV: "py34-pytest33"
+  - TOXENV: "py35-pytest33"
+  - TOXENV: "py36-pytest33"
+  - TOXENV: "py27-pytest33-pexpect"
+  - TOXENV: "py36-pytest33-pexpect"
   - TOXENV: "flakes"
   - TOXENV: "readme"
 
diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index 99ee201..4daf9ff 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -860,7 +860,13 @@ def parse_tests_and_workers_from_output(lines):
     result = []
     for line in lines:
         # example match: "[gw0] PASSED test_a.py::test[7]"
-        m = re.match(r'\[(gw\d)\]\s(.*?)\s(.*::.*)', line.strip())
+        m = re.match(r'''
+            \[(gw\d)\]  # worker
+            \s*
+            (?:\[\s*\d+%\])? # progress indicator (pytest >=3.3)
+            \s(.*?)     # status string ("PASSED")
+            \s(.*::.*)  # nodeid
+        ''', line.strip(), re.VERBOSE)
         if m:
             worker, status, nodeid = m.groups()
             result.append((worker, status, nodeid))
diff --git a/tox.ini b/tox.ini
index 17a3138..a172964 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,8 @@
 [tox]
 # if you change the envlist, please update .travis.yml file as well
 envlist=
-  py{27,34,35,36}-pytest{30,31,32}
-  py{27,36}-pytest{30,31,32}-pexpect
+  py{27,34,35,36}-pytest{30,31,32,33}
+  py{27,36}-pytest{30,31,32,33}-pexpect
   py{27,36}-pytest{master,features}
   flakes
   readme
@@ -18,6 +18,7 @@ deps =
   pytest30: pytest~=3.0.5
   pytest31: pytest~=3.1.0
   pytest32: pytest~=3.2.0
+  pytest33: pytest~=3.3.0
   pytestmaster: git+https://github.com/pytest-dev/pytest.git@master
   pytestfeatures: git+https://github.com/pytest-dev/pytest.git@features
   pexpect: pexpect