@@ -55,11 +55,24 @@ jobs:
               run: npm run test-unit:date -- --ci --maxWorkers=2 --cacheDirectory="$HOME/.jest-cache"
 
     unit-php:
-        name: PHP
+        name: PHP ${{ matrix.php }}${{ matrix.multisite && ' multisite' || '' }} on 'ubuntu-24.04'
         runs-on: 'ubuntu-24.04'
         timeout-minutes: 20
         if: ${{ github.repository == 'WordPress/gutenberg' || github.event_name == 'pull_request' }}
 
+        strategy:
+            fail-fast: true
+            matrix:
+                php:
+                    - '5.6'
+                    - '7.0'
+                    - '7.4'
+                    - '8.0'
+                multisite: [false, true]
+
+        env:
+            WP_ENV_PHP_VERSION: ${{ matrix.php }}
+
         steps:
             - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
@@ -88,9 +101,9 @@ jobs:
               run: npm run lint-php
 
             - name: Running single site unit tests
+              if: ${{ ! matrix.multisite }}
               run: npm run test-unit-php
-              if: ${{ success() || failure() }}
 
             - name: Running multisite unit tests
+              if: ${{ matrix.multisite }}
               run: npm run test-unit-php-multisite
-              if: ${{ success() || failure() }}