diff --git a/.travis.yml b/.travis.yml
index 4ce1344c09..91ce722ca9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ matrix:
     env: WP_TRAVISCI=travis:format
   - php: 7.1
     env: WP_TRAVISCI=travis:js
+  - php: 7.4snapshot
   - php: 7.3
   - php: 7.2
   - php: 7.1
@@ -33,6 +34,7 @@ matrix:
     dist: precise
   - php: nightly
   allow_failures:
+  - php: 7.4snapshot
   - php: nightly
 before_install:
 - |
@@ -67,7 +69,7 @@ before_script:
   # Install the specified version of PHPUnit depending on the PHP version:
   if [[ "$WP_TRAVISCI" == "travis:phpunit" ]]; then
     case "$TRAVIS_PHP_VERSION" in
-      7.3|7.2|7.1|nightly)
+      7.4snapshot|7.3|7.2|7.1|nightly)
         echo "Using PHPUnit 7.x"
         travis_retry composer global require "phpunit/phpunit:^7"
         ;;