diff --git a/.travis.yml b/.travis.yml
index baf9a3bb3d431..699744053a0d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,6 @@ env:
     - PUPPETEER_SKIP_CHROMIUM_DOWNLOAD: true
     - WP_DEVELOP_DIR: ./wordpress
     - LOCAL_SCRIPT_DEBUG: false
-    - INSTALL_COMPOSER: false
     - INSTALL_WORDPRESS: true
 
 # Make sure NodeGit gets the correct C libs.
@@ -89,10 +88,6 @@ install:
       npm run env connect
       npm run env cli plugin activate gutenberg
     fi
-  - |
-    if [[ "$INSTALL_COMPOSER" = "true" ]]; then
-      npm run env docker-run -- php composer install --no-interaction
-    fi
   - |
     if [[ "$E2E_ROLE" = "author" ]]; then
       npm run env cli -- user create author author@example.com --role=author --user_pass=authpass
@@ -159,12 +154,11 @@ jobs:
         - npm run test-unit:native -- --ci --maxWorkers=2 --cacheDirectory="$HOME/.jest-cache"
 
     - name: PHP unit tests
-      env: INSTALL_COMPOSER=true
       script:
         - npm run test-php && npm run test-unit-php-multisite
 
     - name: PHP unit tests (PHP 5.6)
-      env: INSTALL_COMPOSER=true LOCAL_PHP=5.6-fpm
+      env: LOCAL_PHP=5.6-fpm
       script:
         - npm run test-php && npm run test-unit-php-multisite
 
diff --git a/package.json b/package.json
index 86291e9d777f8..c1520542e52b9 100644
--- a/package.json
+++ b/package.json
@@ -206,6 +206,7 @@
 		"lint": "concurrently \"npm run lint-js\" \"npm run lint-pkg-json\" \"npm run lint-css\"",
 		"lint-js": "wp-scripts lint-js",
 		"lint-js:fix": "npm run lint-js -- --fix",
+		"prelint-php": "npm run wp-env run composer install -- --no-interaction",
 		"lint-php": "npm run wp-env run composer run-script lint",
 		"lint-pkg-json": "wp-scripts lint-pkg-json . 'packages/*/package.json'",
 		"lint-css": "wp-scripts lint-style '**/*.scss'",