diff --git a/travis/check-executable-files.sh b/travis/check-executable-files.sh
old mode 100644
new mode 100755
index a5403667f4..99562d8925
--- a/travis/check-executable-files.sh
+++ b/travis/check-executable-files.sh
@@ -9,6 +9,7 @@
 # the docs/CREDITS.txt file.
 #
 set -e
+set -x
 
 DB=$1
 TRAVIS_PHP_VERSION=$2