diff --git a/.travis.yml b/.travis.yml
index 76fae1c7..aacbd919 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,7 @@ before_script:
 script:
   - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.5' ]; then vendor/bin/phpcs -s --extensions=php --standard=build/code-sniffer-ruleset.xml phpseclib/; fi"
   - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.5' ]; then vendor/bin/phpcs -s --extensions=php --standard=build/code-sniffer-ruleset-tests.xml tests/; fi"
-  - phpunit --verbose --coverage-text --coverage-html code_coverage/
+  - travis/run-phpunit.sh
 
 after_success:
   - sh -c "if $TRAVIS_SECURE_ENV_VARS; then travis/upload-code-coverage.sh; fi"
diff --git a/travis/run-phpunit.sh b/travis/run-phpunit.sh
new file mode 100755
index 00000000..a448774a
--- /dev/null
+++ b/travis/run-phpunit.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+set -x
+
+phpunit \
+  --verbose \
+  --coverage-text \
+  --coverage-html code_coverage/