diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index e191e1cb..880f4d67 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -20,7 +20,7 @@ jobs:
       matrix:
         php-versions: ['7.4']
         databases: ['sqlite']
-        server-versions: ['stable22', 'stable23', 'stable24', 'master']
+        server-versions: ['stable22', 'stable23', 'stable24']
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}
 
@@ -80,14 +80,11 @@ jobs:
       matrix:
         php-versions: ['7.4', '8.0']
         databases: ['mysql']
-        server-versions: ['stable21', 'stable22', 'stable23', 'stable24', 'master']
+        server-versions: ['stable21', 'stable22', 'stable23', 'stable24']
         include:
           - php-versions: '8.1'
             databases: 'mysql'
             server-versions: stable24
-          - php-versions: '8.1'
-            databases: 'mysql'
-            server-versions: master
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}
 
@@ -151,7 +148,7 @@ jobs:
       matrix:
         php-versions: ['7.4']
         databases: ['pgsql']
-        server-versions: ['stable22', 'stable23', 'stable24', 'master']
+        server-versions: ['stable22', 'stable23', 'stable24']
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}