diff --git a/test/prepare_db.sh b/test/prepare_db.sh
index 47a39dd8..6559fdab 100755
--- a/test/prepare_db.sh
+++ b/test/prepare_db.sh
@@ -4,6 +4,11 @@
 #
 # NOTE: assumes existance of a "template_postgis"
 # NOTE2: use PG* environment variables to control who and where
+#
+# NOTE3: a side effect of the db preparation is the persistent creation
+#        of two database roles which will be valid for the whole cluster
+#        TODO: fix that
+#
 
 die() {
         msg=$1
@@ -11,15 +16,17 @@ die() {
         exit 1
 }
 
+TEST_DB="cartodb_test_user_1_db"
+
 echo "preparing redis..."
 echo "HSET rails:users:vizzuality id 1" | redis-cli -n 5
-echo "HSET rails:users:vizzuality database_name cartodb_test_user_1_db" | redis-cli -n 5
-echo 'HSET rails:cartodb_test_user_1_db:my_table infowindow "this, that, the other"' | redis-cli -n 0
+echo "HSET rails:users:vizzuality database_name '${TEST_DB}'" | redis-cli -n 5
+echo 'HSET rails:${TEST_DB}:my_table infowindow "this, that, the other"' | redis-cli -n 0
 
 echo "preparing postgres..."
-dropdb cartodb_test_user_1_db
-createdb -Ttemplate_postgis -EUTF8 cartodb_test_user_1_db || die "Could not create test database"
-psql cartodb_test_user_1_db < ./sql/windshaft.test.sql
-psql cartodb_test_user_1_db < ./sql/gadm4.sql
+dropdb "${TEST_DB}"
+createdb -Ttemplate_postgis -EUTF8 "${TEST_DB}" || die "Could not create test database"
+psql "${TEST_DB}" < ./sql/windshaft.test.sql
+psql "${TEST_DB}" < ./sql/gadm4.sql
 
 echo "Finished preparing data. Run tests with expresso."
diff --git a/test/sql/gadm4.sql b/test/sql/gadm4.sql
index 1d6f221f..aba12fa5 100644
--- a/test/sql/gadm4.sql
+++ b/test/sql/gadm4.sql
@@ -96,6 +96,9 @@ ALTER TABLE ONLY gadm4
     ADD CONSTRAINT bdll25_provincias_4326_2_pkey PRIMARY KEY (cartodb_id);
 
 CREATE INDEX bdll25_provincias_4326_2_the_geom_webmercator_idx ON gadm4 USING gist (the_geom_webmercator);
+
+-- development_cartodb_user_3 role
+CREATE USER development_cartodb_user_3;
 GRANT ALL ON TABLE gadm4 TO development_cartodb_user_3;
 GRANT SELECT ON TABLE gadm4 TO tileuser;
 
diff --git a/test/sql/windshaft.test.sql b/test/sql/windshaft.test.sql
index 8824937c..25a9899f 100644
--- a/test/sql/windshaft.test.sql
+++ b/test/sql/windshaft.test.sql
@@ -15,6 +15,8 @@ SET search_path = public, pg_catalog;
 SET default_tablespace = '';
 SET default_with_oids = false;
 
+-- tileuser role
+CREATE USER tileuser;
 
 -- first table
 CREATE TABLE test_table (