diff --git a/.circleci/config.yml b/.circleci/config.yml
index 990b1a5..9d799e5 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -24,8 +24,7 @@ job-references:
     command: |
       sudo apt-get update && sudo apt-get install subversion
       sudo -E docker-php-ext-install mysqli
-      sudo sh -c "printf '\ndeb http://ftp.us.debian.org/debian sid main\n' >> /etc/apt/sources.list"
-      sudo apt-get update && sudo apt-get install mysql-client-5.7
+      sudo apt-get update && sudo apt-get install default-mysql-client
 
   php_job: &php_job
     environment:
diff --git a/scripts/install-wp-tests.sh b/scripts/install-wp-tests.sh
index b53b972..2e0e99f 100755
--- a/scripts/install-wp-tests.sh
+++ b/scripts/install-wp-tests.sh
@@ -107,8 +107,8 @@ install_test_suite() {
     if [ ! -d $WP_TESTS_DIR ]; then
         # set up testing suite
         mkdir -p $WP_TESTS_DIR
-        svn co --quiet https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/includes/ $WP_TESTS_DIR/includes
-        svn co --quiet https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/data/ $WP_TESTS_DIR/data
+        svn co --ignore-externals https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/includes/ $WP_TESTS_DIR/includes
+        svn co --ignore-externals https://develop.svn.wordpress.org/${WP_TESTS_TAG}/tests/phpunit/data/ $WP_TESTS_DIR/data
     fi
 
     if [ ! -f wp-tests-config.php ]; then