diff --git a/.travis.yml b/.travis.yml
index d00bd436..be92a633 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,7 +25,7 @@ before_script:
     - if [ ${TRAVIS_PHP_VERSION:0:3} != "5.2" ]; then travis_retry composer --prefer-source --dev install; fi
     - if [ ${TRAVIS_PHP_VERSION:0:3} <= "5.6" ]; then  phpenv config-add travis.ini; fi
     - if [ ${TRAVIS_PHP_VERSION:0:3} >= "5.3" ]; then  phpenv config-add error_reporting.ini; fi
-    - if [ ${TRAVIS_PHP_VERSION:0:1} <= "5.6"]; then  composer require phpunit/phpunit 5.7; fi
+    - if [${TRAVIS_PHP_VERSION:0:1} = "5"]; then  composer require phpunit/phpunit 5.7; fi
    - if [[ $TRAVIS_PHP_VERSION = 7.* ]]; then  composer require phpunit/phpunit 6.4.1; fi
    - mysql -e "create database IF NOT EXISTS test;" -uroot