diff --git a/test/run_tests.sh b/test/run_tests.sh
index b1d3c693..a1a4b14a 100755
--- a/test/run_tests.sh
+++ b/test/run_tests.sh
@@ -4,15 +4,14 @@
 export TZ='Europe/Rome'
 export PGAPPNAME='cartodb_sqlapi_tester'
 
-export
-
 # In case PGUSER env variable does not exist we attempt to use `postgres`
 if test x"${PGUSER}" = x; then
-  PGUSER=postgres
+    echo "PGUSER not found"
+    PGUSER=postgres
+else
+    echo "PGUSER found = ${PGUSER}"
 fi
 
-export
-
 OPT_CREATE_PGSQL=yes # create/prepare the postgresql test database
 OPT_CREATE_REDIS=yes # create/prepare the redis test databases
 OPT_DROP_PGSQL=yes   # drop the postgreql test environment