diff --git a/tests/travis_install.sh b/tests/travis_install.sh
index fab0165f32ee8330c938cc1bf31581feea72f336..226a553a75fd0cfa0b15f1f8ff6af8a489218dad 100644
--- a/tests/travis_install.sh
+++ b/tests/travis_install.sh
@@ -46,6 +46,7 @@ pip install tox
 pip install codecov
 # use newest pystencils
 pip install git+https://github.com/mabau/pystencils.git
+pip install flake8
 
 if [[ "$COVERAGE" == "true" ]]; then
     pip install -U pytest-cov pytest-virtualenv coverage coveralls flake8