diff --git a/.travis.yml b/.travis.yml
index 028a0c7..6beb88d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,31 +3,36 @@ dist: trusty
 sudo: false
 
 php:
-  - 5.6
   - 7.0
   - 7.1
   - 7.2
   - 7.3
 
 env:
+  global:
+    - COMPOSER_MEMORY_LIMIT=-1
   matrix:
-    - RELEASE=stable COMPOSER_CHANNEL=stable
-    - RELEASE=dev COMPOSER_CHANNEL=stable
-    - RELEASE=stable COMPOSER_CHANNEL=snapshot
+    - RELEASE=^8 COMPOSER_CHANNEL=stable
+    - RELEASE=^9 COMPOSER_CHANNEL=stable
+    - RELEASE=^8 COMPOSER_CHANNEL=snapshot
+    - RELEASE=^9 COMPOSER_CHANNEL=snapshot
 
 matrix:
-  allow_failures:
-    # 5.6 is no longer supported by drupal-composer/drupal-project
-    - php: 5.6
-      env: RELEASE=stable COMPOSER_CHANNEL=stable
   exclude:
-    - php: 5.6
-      env: RELEASE=dev COMPOSER_CHANNEL=stable
-    - php: 5.6
-      env: RELEASE=stable COMPOSER_CHANNEL=snapshot
+    - php: 7.0
+      env: RELEASE=^9 COMPOSER_CHANNEL=stable
+    - php: 7.1
+      env: RELEASE=^9 COMPOSER_CHANNEL=stable
+    - php: 7.2
+      env: RELEASE=^9 COMPOSER_CHANNEL=stable
+    - php: 7.0
+      env: RELEASE=^9 COMPOSER_CHANNEL=snapshot
+    - php: 7.1
+      env: RELEASE=^9 COMPOSER_CHANNEL=snapshot
+    - php: 7.2
+      env: RELEASE=^9 COMPOSER_CHANNEL=snapshot
 
 before_install:
-  - if [[ $TRAVIS_PHP_VERSION = 5.6 ]]; then export COMPOSER_MEMORY_LIMIT=-1; fi;
   - composer --verbose self-update --$COMPOSER_CHANNEL
   - composer --version
 
@@ -37,14 +42,8 @@ install:
 script:
   # Run automated tests.
   - if [[ ${TRAVIS_PHP_VERSION:0:3} != "5.6" ]]; then composer install && ./vendor/bin/phpunit; fi
-  - cd .. && composer create-project drupal-composer/drupal-project:8.x-dev drupal-project --stability dev --no-interaction
+  - cd .. && composer create-project drupal/recommended-project:$RELEASE drupal-project --no-interaction
   - ls -lah . && cd drupal-project
-  # zaporylie/composer-drupal-optimizations has been added to drupal-composer/drupal-project and now must be removed
-  # in order to measure the performance change.
-  - composer remove zaporylie/composer-drupal-optimizations
-  - if [[ $RELEASE = dev ]]; then composer --verbose require --no-update --dev webflo/drupal-core-require-dev:8.6.x-dev; fi;
-  - if [[ $RELEASE = dev ]]; then composer --verbose require --no-update drupal/core:8.6.x-dev; fi;
-  - if [[ $RELEASE = dev ]]; then composer --verbose update; fi;
   # Check the performance.
   - composer update nothing --profile
   - composer config repositories.local path "../composer-drupal-optimizations" && composer require zaporylie/composer-drupal-optimizations:@dev