diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index dc0ba38..c57d68a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -5,8 +5,8 @@ on:
   pull_request:
   workflow_dispatch:
   schedule:
-    # “At 12:00”
-    - cron:  '0 12 * * *'
+    # “At 17:00 on Thursday.”
+    - cron:  '0 17 * * THU'
 
 jobs:
   build:
diff --git a/tests/phpunit-7.0.xml b/tests/phpunit-7.0.xml
index 1cfd691..835d2ad 100644
--- a/tests/phpunit-7.0.xml
+++ b/tests/phpunit-7.0.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 6	PHP 7.0 - PHP 7.2 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 6	PHP 7.0 - PHP 7.2 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit backupGlobals="false"
          backupStaticAttributes="false"
          bootstrap="./../vendor/autoload.php"
diff --git a/tests/phpunit-7.1.xml b/tests/phpunit-7.1.xml
index 2f0f1a2..1df9d3a 100644
--- a/tests/phpunit-7.1.xml
+++ b/tests/phpunit-7.1.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 7	PHP 7.1 - PHP 7.3 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 7	PHP 7.1 - PHP 7.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit backupGlobals="false"
          backupStaticAttributes="false"
          bootstrap="./../vendor/autoload.php"
diff --git a/tests/phpunit-7.2.xml b/tests/phpunit-7.2.xml
index d42256d..5698ff8 100644
--- a/tests/phpunit-7.2.xml
+++ b/tests/phpunit-7.2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 8	>= PHP 7.2 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 8	>= PHP 7.2 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit backupGlobals="false"
          backupStaticAttributes="false"
          bootstrap="./../vendor/autoload.php"
diff --git a/tests/phpunit-7.3.xml b/tests/phpunit-7.3.xml
index 299ec13..6204bc3 100644
--- a/tests/phpunit-7.3.xml
+++ b/tests/phpunit-7.3.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         backupGlobals="false"
diff --git a/tests/phpunit-7.4.xml b/tests/phpunit-7.4.xml
index 299ec13..6204bc3 100644
--- a/tests/phpunit-7.4.xml
+++ b/tests/phpunit-7.4.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         backupGlobals="false"
diff --git a/tests/phpunit-8.0.xml b/tests/phpunit-8.0.xml
index 299ec13..6204bc3 100644
--- a/tests/phpunit-8.0.xml
+++ b/tests/phpunit-8.0.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 9	>= PHP 7.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         backupGlobals="false"
diff --git a/tests/phpunit-8.1.xml b/tests/phpunit-8.1.xml
index ff30d35..e9d8ee6 100644
--- a/tests/phpunit-8.1.xml
+++ b/tests/phpunit-8.1.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 10	>= PHP 8.1 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 10	>= PHP 8.1 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         backupGlobals="false"
diff --git a/tests/phpunit-8.2.xml b/tests/phpunit-8.2.xml
index 206f4e4..92947ce 100644
--- a/tests/phpunit-8.2.xml
+++ b/tests/phpunit-8.2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 10	>= PHP 8.1 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 11 >= PHP 8.2 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         backupGlobals="false" 
@@ -8,7 +8,7 @@
         processIsolation="false" 
         stopOnFailure="false" 
         cacheResult="false" 
-        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" 
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.5/phpunit.xsd" 
         cacheDirectory=".phpunit.cache" 
         backupStaticProperties="false">
   <testsuites>
diff --git a/tests/phpunit-8.3.xml b/tests/phpunit-8.3.xml
index 206f4e4..836e8d1 100644
--- a/tests/phpunit-8.3.xml
+++ b/tests/phpunit-8.3.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 10	>= PHP 8.1 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 12	>= PHP 8.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         backupGlobals="false" 
@@ -8,7 +8,7 @@
         processIsolation="false" 
         stopOnFailure="false" 
         cacheResult="false" 
-        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" 
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.4/phpunit.xsd" 
         cacheDirectory=".phpunit.cache" 
         backupStaticProperties="false">
   <testsuites>
diff --git a/tests/phpunit-8.4.xml b/tests/phpunit-8.4.xml
index 206f4e4..836e8d1 100644
--- a/tests/phpunit-8.4.xml
+++ b/tests/phpunit-8.4.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- PHPUnit 10	>= PHP 8.1 (https://phpunit.de/supported-versions.html) -->
+<!-- PHPUnit 12	>= PHP 8.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         backupGlobals="false" 
@@ -8,7 +8,7 @@
         processIsolation="false" 
         stopOnFailure="false" 
         cacheResult="false" 
-        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" 
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.4/phpunit.xsd" 
         cacheDirectory=".phpunit.cache" 
         backupStaticProperties="false">
   <testsuites>