diff --git a/.gitignore b/.gitignore
index 1044d8cf962..1d28173f966 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@ built
 /phpcs.xml
 /phpunit.xml
 /*.sql
+tmp
 
 # Generated via bin/transform-readme.php
 /readme.txt
diff --git a/bin/local-env/docker-compose.yml b/bin/local-env/docker-compose.yml
index ebf02a3378e..3921cdc3dd4 100644
--- a/bin/local-env/docker-compose.yml
+++ b/bin/local-env/docker-compose.yml
@@ -41,6 +41,7 @@ services:
     volumes:
       - wordpress_phpunit_data:/var/www/html
       - ../../:/var/www/html/wp-content/plugins/amp
+      - ../../tmp/wordpress-develop/tests/phpunit/:/var/www/tests/phpunit
     depends_on:
       - mysql_phpunit
 
@@ -81,6 +82,7 @@ services:
     volumes:
       - wordpress_phpunit_data:/var/www/html
       - ../../:/var/www/html/wp-content/plugins/amp
+      - ../../tmp/wordpress-develop/tests/phpunit/:/var/www/tests/phpunit
     env_file:
       - .env.wp
       - .env.wp-phpunit