diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index ec98202..cb967eb 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -20,7 +20,7 @@ RUN apt-get install -y zlib1g-dev libpq-dev git libicu-dev libxml2-dev libpng-de
 RUN apt-get install -y subversion
 RUN apt-get install -y wget
 
-RUN wget -O /usr/bin/phpunit https://phar.phpunit.de/phpunit-5.phar && chmod +x /usr/bin/phpunit
+RUN wget -O /usr/bin/phpunit https://phar.phpunit.de/phpunit-7.phar && chmod +x /usr/bin/phpunit
 RUN curl --insecure https://getcomposer.org/composer.phar -o /usr/bin/composer && chmod +x /usr/bin/composer
 
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
diff --git a/.travis.yml b/.travis.yml
index 990045d..fb3fa8f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,54 +31,90 @@ jobs:
       env: WP_VERSION=4.4 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.4 WC_VERSION=3.0.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.4 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.4 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.4 WC_VERSION=3.1.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.4 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.4 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.4 WC_VERSION=3.2.0 WP_MULTISITE=0
 
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.5 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.5 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.5 WC_VERSION=3.0.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.5 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.5 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.5 WC_VERSION=3.1.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.5 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.5 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.5 WC_VERSION=3.2.0 WP_MULTISITE=0
 
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.6 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.6 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.6 WC_VERSION=3.0.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.6 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.6 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.6 WC_VERSION=3.1.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.6 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.6 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.6 WC_VERSION=3.2.0 WP_MULTISITE=0
 
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.7 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.7 WC_VERSION=3.0.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.7 WC_VERSION=3.0.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.7 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.7 WC_VERSION=3.1.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.7 WC_VERSION=3.1.0 WP_MULTISITE=0
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.7 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.4
       env: WP_VERSION=4.7 WC_VERSION=3.2.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.7 WC_VERSION=3.2.0 WP_MULTISITE=0
 
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.8 WC_VERSION=3.3.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.8 WC_VERSION=3.3.0 WP_MULTISITE=0
     - php: 7.0
@@ -88,6 +124,9 @@ jobs:
     - php: 7.2
       env: WP_VERSION=4.8 WC_VERSION=3.3.0 WP_MULTISITE=0 USE_COMPOSER=1
 
+    - php: 5.3
+      dist: precise
+      env: WP_VERSION=4.8 WC_VERSION=3.4.0 WP_MULTISITE=0
     - php: 5.6
       env: WP_VERSION=4.8 WC_VERSION=3.4.0 WP_MULTISITE=0
     - php: 7.0
@@ -194,6 +233,8 @@ jobs:
       env: WP_VERSION=latest WC_VERSION=latest WP_MULTISITE=0
     - php: 7.2
       env: WP_VERSION=latest WC_VERSION=latest WP_MULTISITE=0 USE_COMPOSER=1
+    - php: 7.3
+      env: WP_VERSION=latest WC_VERSION=latest WP_MULTISITE=0
       after_success: bash <(curl -s https://codecov.io/bash)
 
     - stage: deploy
diff --git a/docker-compose.yml b/docker-compose.yml
index 75b9f70..48ed647 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,7 +7,7 @@ services:
       - ./:/code
     links:
       - "mysql"
-    #user: ${UID:-1000}:${GID:-1000}
+    user: ${UID:-1000}:${GID:-1000}
     depends_on:
       - mysql
     entrypoint: make local_test