diff --git a/api/phpunit.nodocker.xml b/api/phpunit.nodocker.xml
index ff4e41cbac..483f3e45f2 100644
--- a/api/phpunit.nodocker.xml
+++ b/api/phpunit.nodocker.xml
@@ -2,7 +2,7 @@
 
 <!-- https://phpunit.readthedocs.io/en/latest/configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.4/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.3/phpunit.xsd"
          backupGlobals="false"
          colors="true"
          bootstrap="tests/bootstrap.php"
@@ -19,7 +19,7 @@
         <server name="APP_ENV" value="test" force="true"/>
         <server name="SHELL_VERBOSITY" value="-1"/>
         <server name="SYMFONY_PHPUNIT_REMOVE" value=""/>
-        <server name="SYMFONY_PHPUNIT_VERSION" value="11.4.3"/>
+        <server name="SYMFONY_PHPUNIT_VERSION" value="12.3.11"/>
         <env name="DATABASE_URL" value="postgresql://ecamp3:ecamp3@localhost:5432/ecamp3dev?serverVersion=15%26charset=utf8" force="true" />
         <env name="TEST_DATABASE_URL" value="postgresql://ecamp3:ecamp3@localhost:5432/ecamp3dev?serverVersion=15%26charset=utf8" force="true" />
         <env name="SYMFONY_DEPRECATIONS_HELPER" value="quiet[]=indirect&amp;max[total]=999999"/>
diff --git a/api/phpunit.xml.dist b/api/phpunit.xml.dist
index dc15e0fec4..e1780f97bb 100644
--- a/api/phpunit.xml.dist
+++ b/api/phpunit.xml.dist
@@ -2,7 +2,7 @@
 
 <!-- https://phpunit.readthedocs.io/en/latest/configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.4/phpunit.xsd"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.3/phpunit.xsd"
     backupGlobals="false"
     colors="true"
     bootstrap="tests/bootstrap.php"
@@ -19,7 +19,7 @@
     <server name="APP_ENV" value="test" force="true"/>
     <server name="SHELL_VERBOSITY" value="-1"/>
     <server name="SYMFONY_PHPUNIT_REMOVE" value=""/>
-    <server name="SYMFONY_PHPUNIT_VERSION" value="11.4.3"/>
+    <server name="SYMFONY_PHPUNIT_VERSION" value="12.3.11"/>
     <env name="SYMFONY_DEPRECATIONS_HELPER" value="quiet[]=indirect&amp;max[total]=999999"/>
     <!-- if "Other deprecation notices" ever gets annoying: 
           <env name="SYMFONY_DEPRECATIONS_HELPER"