diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index e5161db..da4c83a 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -82,10 +82,13 @@ jobs:
           - "windows-latest"
         include:
           - php-version: "5.4"
+            operating-system: "ubuntu-latest"
             extensions: ", libsodium-1.0.7, uuid-1.0.4"
           - php-version: "5.5"
+            operating-system: "ubuntu-latest"
             extensions: ", libsodium-1.0.7, uuid-1.0.4"
           - php-version: "5.6"
+            operating-system: "ubuntu-latest"
             extensions: ", libsodium-1.0.7, uuid-1.0.4"
           - php-version: "8.1"
             operating-system: "ubuntu-latest"