diff --git a/.travis.yml b/.travis.yml
index 934a1a24..92908014 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,6 +44,7 @@ matrix:
         - CS_CHECK=true
         - TEST_COVERAGE=true
         - PHPSTAN_TEST=true
+        - LEGACY_DEPS="ocramius/proxy-manager phpbench/phpbench phpunit/phpunit"
     - php: 7.1
       env:
         - DEPS=latest