diff --git a/.github/workflows/quicktest.yml b/.github/workflows/quicktest.yml
index 5edde2a41a..50844feefb 100644
--- a/.github/workflows/quicktest.yml
+++ b/.github/workflows/quicktest.yml
@@ -32,7 +32,7 @@ jobs:
 
         include:
           - php: '5.4'
-            os: 'ubuntu-latest'
+            os: 'ubuntu-24.04-arm'
             custom_ini: false
           # Installing on Windows with PHP 5.4 runs into all sorts of problems with Composer.
           # See this issue for more context (yes, I've seen this problem before):
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3d9d758301..14a666f78b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -189,7 +189,7 @@ jobs:
 
         include:
           - php: '5.4'
-            os: 'ubuntu-latest'
+            os: 'ubuntu-24.04-arm'
             custom_ini: false
           # Installing on Windows with PHP 5.4 runs into all sorts of problems with Composer.
           # Considering PHP 5.4 is ancient, I deem it acceptable to run coverage on Windows on PHP 5.5.
@@ -205,7 +205,7 @@ jobs:
             custom_ini: true
 
     # yamllint disable-line rule:line-length
-    name: "Coverage: ${{ matrix.php }} ${{ matrix.custom_ini && ' with custom ini settings' || '' }} (${{ matrix.os == 'ubuntu-latest' && 'Linux' || 'Win'  }})"
+    name: "Coverage: ${{ matrix.php }} ${{ matrix.custom_ini && ' with custom ini settings' || '' }} (${{ matrix.os == 'windows-latest' && 'Win' || 'Linux'  }})"
 
     steps:
       - name: Prepare git to leave line endings alone