diff --git a/phpunit/functional/CommonDBTMTest.php b/phpunit/functional/CommonDBTMTest.php
index 6c153ae1fb0..fa2f8cb9dd8 100644
--- a/phpunit/functional/CommonDBTMTest.php
+++ b/phpunit/functional/CommonDBTMTest.php
@@ -203,7 +203,7 @@ public function testGetEmpty()
      *
      * @return array
      */
-    protected function getTableProvider()
+    public static function getTableProvider()
     {
         return [
             [\DBConnection::class, ''], // "static protected $notable = true;" case
@@ -935,7 +935,6 @@ public function testUpdate()
         $this->assertSame('renamed', $computer->fields['name']);
     }
 
-
     public function testTimezones()
     {
         global $DB;
@@ -1001,7 +1000,7 @@ public function testCircularRelation()
         $this->assertFalse(\Project::checkCircularRelation($project_id_4, $project_id_3));
     }
 
-    protected function relationConfigProvider()
+    public static function relationConfigProvider()
     {
         return [
             [
diff --git a/phpunit/functional/ConfigTest.php b/phpunit/functional/ConfigTest.php
index cbaf18f4c1f..0b661896f53 100644
--- a/phpunit/functional/ConfigTest.php
+++ b/phpunit/functional/ConfigTest.php
@@ -790,7 +790,7 @@ public function testPasswordExpirationDelayUpdate()
         );
     }
 
-    protected function logConfigChangeProvider()
+    public static function logConfigChangeProvider()
     {
         global $PLUGIN_HOOKS;
 
diff --git a/phpunit/functional/HtmlTest.php b/phpunit/functional/HtmlTest.php
index 7dbc5910e43..e1f7150ef5f 100644
--- a/phpunit/functional/HtmlTest.php
+++ b/phpunit/functional/HtmlTest.php
@@ -946,7 +946,7 @@ public function testGetScssFileHash()
     }
 
 
-    protected function testGetGenericDateTimeSearchItemsProvider(): array
+    public static function testGetGenericDateTimeSearchItemsProvider(): array
     {
         return [
             [
diff --git a/phpunit/functional/Log.php b/phpunit/functional/Log.php
index 1dff0b27bef..a6fe07aab12 100644
--- a/phpunit/functional/Log.php
+++ b/phpunit/functional/Log.php
@@ -743,7 +743,7 @@ public function testConvertFiltersValuesToSqlCriteria($filters_values, $expected
         $this->assertSame($expected_result, \Log::convertFiltersValuesToSqlCriteria($filters_values));
     }
 
-    protected function userNameFormattingProvider()
+    public static function userNameFormattingProvider()
     {
         return [
             [TU_USER, TU_PASS, TU_USER],
diff --git a/phpunit/functional/ToolboxTest.php b/phpunit/functional/ToolboxTest.php
index cfa9308ad7b..45688626e8f 100644
--- a/phpunit/functional/ToolboxTest.php
+++ b/phpunit/functional/ToolboxTest.php
@@ -543,7 +543,7 @@ public function testGetPictureUrl($path, $url)
     /**
      * Data provider for self::testConvertTagToImage().
      */
-    protected function convertTagToImageProvider()
+    public static function convertTagToImageProvider()
     {
         $data = [];
 
@@ -636,7 +636,7 @@ public function testConvertTagToImage($item, $expected_url)
     /**
      * Data provider for self::testBaseUrlInConvertTagToImage().
      */
-    protected function convertTagToImageBaseUrlProvider()
+    public static function convertTagToImageBaseUrlProvider()
     {
         $item = new \Ticket();
         $item->fields['id'] = mt_rand(1, 50);
@@ -894,7 +894,7 @@ public function testConvertTagToImageWithDuplicatedInlinedImg()
         );
     }
 
-    protected function shortenNumbers()
+    public static function shortenNumbers()
     {
         return [
             [
@@ -1141,7 +1141,7 @@ public function testFutureDeprecated()
     }
 
 
-    public function hasTraitProvider()
+    public static function hasTraitProvider()
     {
         return [
             [\Computer::class, Clonable::class, true],
@@ -1196,7 +1196,7 @@ public function testGetDocumentsFromTag()
         $this->AssertCount(1, $output);
     }
 
-    public function appendParametersProvider()
+    public static function appendParametersProvider()
     {
         return [
             [
@@ -1258,7 +1258,7 @@ public function testAppendParameters(array $params, string $separator, string $e
      *
      * @return Generator
      */
-    protected function testIsFloatProvider(): Generator
+    public static function testIsFloatProvider(): Generator
     {
         yield [
             'value'    => null,
@@ -1347,7 +1347,7 @@ public function testIsFloat($value, bool $expected, ?string $warning = null): vo
      *
      * @return Generator
      */
-    protected function testgetDecimalNumbersProvider(): Generator
+    public static function testgetDecimalNumbersProvider(): Generator
     {
         yield [
             'value' => "1",
@@ -1431,7 +1431,7 @@ public function testGetDecimalNumbers($value, int $decimals, ?string $warning =
      *
      * @return Generator
      */
-    protected function testGetMioSizeFromStringProvider(): Generator
+    public static function testGetMioSizeFromStringProvider(): Generator
     {
         yield [
             'size'     => "1024",
@@ -1505,7 +1505,7 @@ public function testGetMioSizeFromString(string $size, $expected): void
         $this->assertEquals($expected, $result);
     }
 
-    protected function safeUrlProvider(): iterable
+    public static function safeUrlProvider(): iterable
     {
         // Invalid URLs are refused
         yield [