diff --git a/.travis/custom.sh b/.travis/custom.sh
index 3a605ac34..5f47db55e 100755
--- a/.travis/custom.sh
+++ b/.travis/custom.sh
@@ -7,7 +7,10 @@
 #        environment created by tox)
 #   $2 - full path to system python (python 3.x installed on the system)
 
-set -e
+set -ex
+shopt
+alias
+env
 
 ME=$(basename $0)
 SCRIPTDIR=$(readlink -f $(dirname $0))