diff --git a/.github/workflows/phpunit-mysql.yml b/.github/workflows/phpunit-mysql.yml
index 407580ae..45d78dfa 100644
--- a/.github/workflows/phpunit-mysql.yml
+++ b/.github/workflows/phpunit-mysql.yml
@@ -22,8 +22,8 @@ jobs:
       # do not stop on another job's failure
       fail-fast: false
       matrix:
-        php-versions: ['7.4', '8.0']
-        server-versions: ['master']
+        php-versions: ['7.4', '8.0', '8.1']
+        server-versions: ['master', 'stable25']
 
     services:
       mysql:
diff --git a/.github/workflows/phpunit-oci.yml b/.github/workflows/phpunit-oci.yml
index 93d814cb..9c894557 100644
--- a/.github/workflows/phpunit-oci.yml
+++ b/.github/workflows/phpunit-oci.yml
@@ -16,7 +16,7 @@ env:
 
 jobs:
   phpunit-oci:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     strategy:
       # do not stop on another job's failure
diff --git a/.github/workflows/phpunit-sqlite.yml b/.github/workflows/phpunit-sqlite.yml
index ed55539e..c6e159fb 100644
--- a/.github/workflows/phpunit-sqlite.yml
+++ b/.github/workflows/phpunit-sqlite.yml
@@ -22,7 +22,7 @@ jobs:
       # do not stop on another job's failure
       fail-fast: false
       matrix:
-        php-versions: ['7.4']
+        php-versions: ['8.0']
         databases: ['sqlite']
         server-versions: ['master']