diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index 3b0533b73ba74..a639f0583a614 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -76,7 +76,7 @@ public function testInvalidCommand(Process $process)
         $this->assertSame('\\' === \DIRECTORY_SEPARATOR ? 1 : 127, $process->run());
     }
 
-    public function invalidProcessProvider()
+    public static function invalidProcessProvider(): array
     {
         return [
             [new Process(['invalid'])],
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
index 26f9be4ad714e..8ec4ac1d3169a 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
@@ -1211,7 +1211,7 @@ public function testDenormalizeBooleanTypeWithFilterBool(array $data, ?bool $exp
         $this->assertSame($expectedFoo, $dummy->foo);
     }
 
-    public function provideDenormalizeWithFilterBoolData(): array
+    public static function provideDenormalizeWithFilterBoolData(): array
     {
         return [
             [['foo' => 'true'], true],
diff --git a/src/Symfony/Component/TypeInfo/Tests/TypeResolver/ReflectionTypeResolverTest.php b/src/Symfony/Component/TypeInfo/Tests/TypeResolver/ReflectionTypeResolverTest.php
index 4d7bff9449764..4cadd5943e102 100644
--- a/src/Symfony/Component/TypeInfo/Tests/TypeResolver/ReflectionTypeResolverTest.php
+++ b/src/Symfony/Component/TypeInfo/Tests/TypeResolver/ReflectionTypeResolverTest.php
@@ -44,7 +44,7 @@ public function testResolve(Type $expectedType, \ReflectionType $reflection, ?Ty
     /**
      * @return iterable<array{0: Type, 1: \ReflectionType, 2?: TypeContext}>
      */
-    public function resolveDataProvider(): iterable
+    public static function resolveDataProvider(): iterable
     {
         $typeContext = (new TypeContextFactory())->createFromClassName(ReflectionExtractableDummy::class);
         $reflection = new \ReflectionClass(ReflectionExtractableDummy::class);
@@ -89,7 +89,7 @@ public function testCannotResolveClassKeywordsWithoutTypeContext(\ReflectionType
     /**
      * @return iterable<array{0: \ReflectionType}>
      */
-    public function classKeywordsTypesDataProvider(): iterable
+    public static function classKeywordsTypesDataProvider(): iterable
     {
         $reflection = new \ReflectionClass(ReflectionExtractableDummy::class);
 
diff --git a/src/Symfony/Component/TypeInfo/Tests/TypeResolver/StringTypeResolverTest.php b/src/Symfony/Component/TypeInfo/Tests/TypeResolver/StringTypeResolverTest.php
index 78377560a8d76..22812267b6466 100644
--- a/src/Symfony/Component/TypeInfo/Tests/TypeResolver/StringTypeResolverTest.php
+++ b/src/Symfony/Component/TypeInfo/Tests/TypeResolver/StringTypeResolverTest.php
@@ -60,7 +60,7 @@ public function __toString(): string
     /**
      * @return iterable<array{0: Type, 1: string, 2?: TypeContext}>
      */
-    public function resolveDataProvider(): iterable
+    public static function resolveDataProvider(): iterable
     {
         $typeContextFactory = new TypeContextFactory(new StringTypeResolver());