diff --git a/.travis.yml b/.travis.yml
index a7a3cbf..d477a07 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ matrix:
 
 before_install:
   - sudo bash $TRAVIS_BUILD_DIR/scripts/ci/install_postgres.sh
+  - sudo make clean-all
 
 install:
   - sudo make install
diff --git a/scripts/ci/install_postgres.sh b/scripts/ci/install_postgres.sh
index 9ea6676..561e050 100644
--- a/scripts/ci/install_postgres.sh
+++ b/scripts/ci/install_postgres.sh
@@ -32,6 +32,8 @@ apt-get -y install postgresql-${PGSQL_VERSION} postgresql-${PGSQL_VERSION}-postg
 # Configure it to accept local connections from postgres
 echo -e "# TYPE  DATABASE        USER            ADDRESS                 METHOD \nlocal   all             postgres                                trust\nlocal   all             all                                     trust\nhost    all             all             127.0.0.1/32            trust" > /etc/postgresql/${PGSQL_VERSION}/main/pg_hba.conf
 
+psql -c  "CREATE LANGUAGE plpythonu;"
+
 # Restart PostgreSQL
 /etc/init.d/postgresql restart ${PGSQL_VERSION}