diff --git a/.travis.yml b/.travis.yml
index faf3dce1..c3f3ce7b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,7 +28,7 @@ install:
   - cd ..
   - eval `ssh-agent -s`
   - travis/setup-secure-shell.sh
-  - sh -c "if [ '$TRAVIS_PHP_VERSION' != 'hhvm' -a '$TRAVIS_PHP_VERSION' != '7.0' -a '$TRAVIS_PHP_VERSION' != '7.1' ]; then travis/install-php-extensions.sh; fi"
+  - sh -c "if [ '$TRAVIS_PHP_VERSION' != 'hhvm' -a `php -r "echo (int) version_compare(PHP_VERSION, '7.0', '<');"` = "1" ]; then travis/install-php-extensions.sh; fi"
   - travis/setup-composer.sh
 
 script:
diff --git a/travis/run-phpunit.sh b/travis/run-phpunit.sh
index 5ee69d66..ce393a77 100755
--- a/travis/run-phpunit.sh
+++ b/travis/run-phpunit.sh
@@ -20,7 +20,7 @@ then
   PHPUNIT_ARGS="$PHPUNIT_ARGS -d zend.enable_gc=0"
 fi
 
-if [ "$TRAVIS_PHP_VERSION" = 'hhvm' -o "$TRAVIS_PHP_VERSION" = '7.0' ]
+if [ "$TRAVIS_PHP_VERSION" = 'hhvm' -o `php -r "echo (int) version_compare(PHP_VERSION, '7.0', '>=');"` = "1" ]
 then
   find tests -type f -name "*Test.php" | \
     parallel --gnu --keep-order \