diff --git a/.appveyor.yml b/.appveyor.yml
index 50f752a2e47d..ff907a5920b9 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -65,7 +65,7 @@ install:
- activate test-environment
- echo %PYTHON_VERSION% %TARGET_ARCH%
# pytest-cov>=2.3.1 due to https://github.com/pytest-dev/pytest-cov/issues/124
- - pip install -q "pytest>=3.4" "pytest-cov>=2.3.1" pytest-rerunfailures pytest-timeout pytest-xdist
+ - pip install -q "pytest>=3.4,<4.1" "pytest-cov>=2.3.1" pytest-rerunfailures pytest-timeout pytest-xdist
# Apply patch to `subprocess` on Python versions > 2 and < 3.6.3
# https://github.com/matplotlib/matplotlib/issues/9176
diff --git a/requirements/testing/travis_all.txt b/requirements/testing/travis_all.txt
index 3f5811b1b778..758d8d53f8c1 100644
--- a/requirements/testing/travis_all.txt
+++ b/requirements/testing/travis_all.txt
@@ -6,7 +6,7 @@ cycler
numpy
pillow
pyparsing
-pytest
+pytest<4.1
pytest-cov
pytest-faulthandler
pytest-rerunfailures
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