diff --git a/.github/workflows/integrationtest.yml b/.github/workflows/integrationtest.yml
index 2b7cb6e3..48be520e 100644
--- a/.github/workflows/integrationtest.yml
+++ b/.github/workflows/integrationtest.yml
@@ -54,11 +54,19 @@ jobs:
           # @link https://github.com/PHPCSStandards/composer-installer/pull/213
           - php: '5.4'
             os: 'windows-latest'
+          # Composer 1.x is no longer supported and while Composer 2.2 is an LTS version, the LTS
+          # is only for critical bugs and security issues, not for supporting new PHP versions.
+          # In practice, this means that Composer 1.x and 2.2 are not compatible with PHP 8.4 and later.
+          # @link https://github.com/composer/composer/issues/10340
+          - php: '8.4'
+            composer: 'v1'
 
         include:
           # Composer 2.3 drops support for PHP < 7.2, so for PHP 5.4 to 7.1, `v2` will install
           # Composer 2.2, for PHP 7.2 and up, `v2` will install Composer 2.3.
-          # These builds make sure the Composer 2.2 LTS version is 100% supported for PHP 7.2-8.x.
+          # These builds make sure the Composer 2.2 LTS version is 100% supported for PHP 7.2-8.3.
+          # Note: Composer 2.2 is not compatible with PHP 8.4 and it is unlikely that it will be
+          # made compatible with PHP 8.4.
           - php: '7.2'
             composer: '2.2'
             os: 'ubuntu-latest'
@@ -80,9 +88,6 @@ jobs:
           - php: '8.3'
             composer: '2.2'
             os: 'ubuntu-latest'
-          - php: '8.4'
-            composer: '2.2'
-            os: 'ubuntu-latest'
 
           - php: '7.2'
             composer: '2.2'
@@ -105,9 +110,6 @@ jobs:
           - php: '8.3'
             composer: '2.2'
             os: 'windows-latest'
-          - php: '8.4'
-            composer: '2.2'
-            os: 'windows-latest'
 
           # Also test against the dev version of Composer for early warning about upcoming changes.
           - php: 'latest'