diff --git a/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/AddPackageToRequireComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/AddPackageToRequireComposerJsonFractorTest.php
index f61c427c..e17c2405 100644
--- a/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/AddPackageToRequireComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/AddPackageToRequireComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class AddPackageToRequireComposerJsonFractorTest extends AbstractFractorTe
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, AddPackageToRequireComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(AddPackageToRequireComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/AddPackageToRequireComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/AddPackageToRequireDevComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/AddPackageToRequireDevComposerJsonFractorTest.php
index 573c1dd3..516c84c3 100644
--- a/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/AddPackageToRequireDevComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/AddPackageToRequireDevComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class AddPackageToRequireDevComposerJsonFractorTest extends AbstractFracto
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, AddPackageToRequireDevComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(AddPackageToRequireDevComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/AddPackageToRequireDevComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/ChangePackageVersionComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/ChangePackageVersionComposerJsonFractorTest.php
index dccafebc..fe499054 100644
--- a/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/ChangePackageVersionComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/ChangePackageVersionComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class ChangePackageVersionComposerJsonFractorTest extends AbstractFractorT
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, ChangePackageVersionComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(ChangePackageVersionComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/ChangePackageVersionComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/RemovePackageComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/RemovePackageComposerJsonFractorTest.php
index 82f092dc..c77df03e 100644
--- a/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/RemovePackageComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/RemovePackageComposerJsonFractor/RemovePackageComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class RemovePackageComposerJsonFractorTest extends AbstractFractorTestCase
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, RemovePackageComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(RemovePackageComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/RenamePackageComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/RenamePackageComposerJsonFractorTest.php
index fce9be17..4c4aaf54 100644
--- a/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/RenamePackageComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/RenamePackageComposerJsonFractor/RenamePackageComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class RenamePackageComposerJsonFractorTest extends AbstractFractorTestCase
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, RenamePackageComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(RenamePackageComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/Fixtures/composer.json b/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/Fixtures/composer.json.fixture
similarity index 100%
rename from packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/Fixtures/composer.json
rename to packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/Fixtures/composer.json.fixture
diff --git a/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/ReplacePackageAndVersionComposerJsonFractorTest.php b/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/ReplacePackageAndVersionComposerJsonFractorTest.php
index ed8b6891..7b3fcb27 100644
--- a/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/ReplacePackageAndVersionComposerJsonFractorTest.php
+++ b/packages/fractor-composer-json/rules-tests/ReplacePackageAndVersionComposerJsonFractor/ReplacePackageAndVersionComposerJsonFractorTest.php
@@ -15,12 +15,12 @@ final class ReplacePackageAndVersionComposerJsonFractorTest extends AbstractFrac
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, ReplacePackageAndVersionComposerJsonFractor::class);
+        $this->assertThatRuleIsApplied(ReplacePackageAndVersionComposerJsonFractor::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.json.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-fluid/tests/FluidFileProcessor/Fixtures/fluid.html b/packages/fractor-fluid/tests/FluidFileProcessor/Fixtures/fluid.html.fixture
similarity index 100%
rename from packages/fractor-fluid/tests/FluidFileProcessor/Fixtures/fluid.html
rename to packages/fractor-fluid/tests/FluidFileProcessor/Fixtures/fluid.html.fixture
diff --git a/packages/fractor-fluid/tests/FluidFileProcessor/FluidFileProcessorTest.php b/packages/fractor-fluid/tests/FluidFileProcessor/FluidFileProcessorTest.php
index 565ac57a..55aadf8e 100644
--- a/packages/fractor-fluid/tests/FluidFileProcessor/FluidFileProcessorTest.php
+++ b/packages/fractor-fluid/tests/FluidFileProcessor/FluidFileProcessorTest.php
@@ -15,12 +15,12 @@ final class FluidFileProcessorTest extends AbstractFractorTestCase
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, DummyFluidFractorRule::class);
+        $this->assertThatRuleIsApplied(DummyFluidFractorRule::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-rule-generator/src/Finder/TemplateFinder.php b/packages/fractor-rule-generator/src/Finder/TemplateFinder.php
index e5e8eb0e..921d2e22 100644
--- a/packages/fractor-rule-generator/src/Finder/TemplateFinder.php
+++ b/packages/fractor-rule-generator/src/Finder/TemplateFinder.php
@@ -42,7 +42,7 @@ private function addRuleAndTestCase(string $fixtureFileExtension): array
         return [
             __DIR__ . '/../../templates/rules/TYPO3__MajorPrefixed__/__Type__/__Name__.php',
             __DIR__ . '/../../templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/__Name__Test.php.inc',
-            __DIR__ . '/../../templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.' . $fixtureFileExtension,
+            __DIR__ . '/../../templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.' . $fixtureFileExtension . '.fixture',
             __DIR__ . '/../../templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/config/fractor.php.inc',
         ];
     }
diff --git a/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.html b/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.html.fixture
similarity index 100%
rename from packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.html
rename to packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.html.fixture
diff --git a/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.json b/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.json.fixture
similarity index 100%
rename from packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.json
rename to packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.json.fixture
diff --git a/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.typoscript b/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.typoscript
rename to packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.typoscript.fixture
diff --git a/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.xml b/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.xml.fixture
similarity index 100%
rename from packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.xml
rename to packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.xml.fixture
diff --git a/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.yaml b/packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.yaml.fixture
similarity index 100%
rename from packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.yaml
rename to packages/fractor-rule-generator/templates/rules-tests/TYPO3__MajorPrefixed__/__Type__/__Test_Directory__/Fixtures/fixture.yaml.fixture
diff --git a/packages/fractor-rule-generator/tests/Functional/Console/Command/GenerateRuleCommandTest.php b/packages/fractor-rule-generator/tests/Functional/Console/Command/GenerateRuleCommandTest.php
index b51015a4..d7ba97c5 100644
--- a/packages/fractor-rule-generator/tests/Functional/Console/Command/GenerateRuleCommandTest.php
+++ b/packages/fractor-rule-generator/tests/Functional/Console/Command/GenerateRuleCommandTest.php
@@ -98,7 +98,9 @@ public function testCreateRuleForFlexFormWithoutChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/Fixtures/fixture.xml');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/Fixtures/fixture.xml.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/MigrateFlexFormFractorTest.php.inc'
         );
@@ -141,7 +143,9 @@ public function testCreateRuleForFlexFormWithChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/Fixtures/fixture.xml');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/Fixtures/fixture.xml.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/FlexForm/MigrateFlexFormFractor/MigrateFlexFormFractorTest.php.inc'
         );
@@ -176,7 +180,9 @@ public function testCreateRuleForFluidWithoutChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/Fluid/MigrateFluidFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/Fixtures/fixture.html');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/Fixtures/fixture.html.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/MigrateFluidFractorTest.php.inc'
         );
@@ -216,7 +222,9 @@ public function testCreateRuleForFluidWithChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/Fluid/MigrateFluidFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/Fixtures/fixture.html');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/Fixtures/fixture.html.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Fluid/MigrateFluidFractor/MigrateFluidFractorTest.php.inc'
         );
@@ -253,7 +261,7 @@ public function testCreateRuleForTypoScriptWithoutChangelog(): void
             $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/config/fractor.php'
         );
         self::assertFileExists(
-            $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/Fixtures/fixture.typoscript'
+            $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/Fixtures/fixture.typoscript.fixture'
         );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/MigrateTypoScriptFractorTest.php.inc'
@@ -300,7 +308,7 @@ public function testCreateRuleForTypoScriptWithChangelog(): void
             $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/config/fractor.php'
         );
         self::assertFileExists(
-            $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/Fixtures/fixture.typoscript'
+            $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/Fixtures/fixture.typoscript.fixture'
         );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/TypoScript/MigrateTypoScriptFractor/MigrateTypoScriptFractorTest.php.inc'
@@ -335,7 +343,9 @@ public function testCreateRuleForYamlWithoutChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/Yaml/MigrateYamlFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/Fixtures/fixture.yaml');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/Fixtures/fixture.yaml.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/MigrateYamlFractorTest.php.inc'
         );
@@ -375,7 +385,9 @@ public function testCreateRuleForYamlWithChangelog(): void
         self::assertFileExists($basePathConfig . '/typo3-9999.php');
         self::assertFileExists($basePathRules . '/TYPO3v9999/Yaml/MigrateYamlFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/config/fractor.php');
-        self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/Fixtures/fixture.yaml');
+        self::assertFileExists(
+            $basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/Fixtures/fixture.yaml.fixture'
+        );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Yaml/MigrateYamlFractor/MigrateYamlFractorTest.php.inc'
         );
@@ -410,7 +422,7 @@ public function testCreateRuleForComposerWithoutChangelog(): void
         self::assertFileExists($basePathRules . '/TYPO3v9999/Composer/MigrateComposerFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/config/fractor.php');
         self::assertFileExists(
-            $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/Fixtures/fixture.json'
+            $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/Fixtures/fixture.json.fixture'
         );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/MigrateComposerFractorTest.php.inc'
@@ -455,7 +467,7 @@ public function testCreateRuleForComposerWithChangelog(): void
         self::assertFileExists($basePathRules . '/TYPO3v9999/Composer/MigrateComposerFractor.php');
         self::assertFileExists($basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/config/fractor.php');
         self::assertFileExists(
-            $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/Fixtures/fixture.json'
+            $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/Fixtures/fixture.json.fixture'
         );
         self::assertFileExists(
             $basePathRuleTests . '/TYPO3v9999/Composer/MigrateComposerFractor/MigrateComposerFractorTest.php.inc'
diff --git a/packages/fractor-typoscript/tests/TypoScriptFileProcessor/Fixtures/fixture.typoscript b/packages/fractor-typoscript/tests/TypoScriptFileProcessor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/fractor-typoscript/tests/TypoScriptFileProcessor/Fixtures/fixture.typoscript
rename to packages/fractor-typoscript/tests/TypoScriptFileProcessor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/fractor-typoscript/tests/TypoScriptFileProcessor/TypoScriptFileProcessorTest.php b/packages/fractor-typoscript/tests/TypoScriptFileProcessor/TypoScriptFileProcessorTest.php
index deec0ac1..e5adaad4 100644
--- a/packages/fractor-typoscript/tests/TypoScriptFileProcessor/TypoScriptFileProcessorTest.php
+++ b/packages/fractor-typoscript/tests/TypoScriptFileProcessor/TypoScriptFileProcessorTest.php
@@ -14,12 +14,12 @@ class TypoScriptFileProcessorTest extends AbstractFractorTestCase
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, DummyTypoScriptFractorRule::class);
+        $this->assertThatRuleIsApplied(DummyTypoScriptFractorRule::class);
     }
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor-yaml/tests/YamlFileProcessor/Fixtures/fixture.yaml b/packages/fractor-yaml/tests/YamlFileProcessor/Fixtures/fixture.yaml.fixture
similarity index 100%
rename from packages/fractor-yaml/tests/YamlFileProcessor/Fixtures/fixture.yaml
rename to packages/fractor-yaml/tests/YamlFileProcessor/Fixtures/fixture.yaml.fixture
diff --git a/packages/fractor-yaml/tests/YamlFileProcessor/YamlFileProcessorTest.php b/packages/fractor-yaml/tests/YamlFileProcessor/YamlFileProcessorTest.php
index 6c9d8aaa..13c88b01 100644
--- a/packages/fractor-yaml/tests/YamlFileProcessor/YamlFileProcessorTest.php
+++ b/packages/fractor-yaml/tests/YamlFileProcessor/YamlFileProcessorTest.php
@@ -15,12 +15,12 @@ final class YamlFileProcessorTest extends AbstractFractorTestCase
     public function test(string $filePath): void
     {
         $this->doTestFile($filePath);
-        $this->assertThatRuleIsApplied($filePath, DummyYamlFractorRule::class);
+        $this->assertThatRuleIsApplied(DummyYamlFractorRule::class);
     }
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/fractor/src/Testing/PHPUnit/AbstractFractorTestCase.php b/packages/fractor/src/Testing/PHPUnit/AbstractFractorTestCase.php
index d939ee14..e7c84973 100644
--- a/packages/fractor/src/Testing/PHPUnit/AbstractFractorTestCase.php
+++ b/packages/fractor/src/Testing/PHPUnit/AbstractFractorTestCase.php
@@ -16,7 +16,9 @@
 use a9f\Fractor\Testing\Contract\FractorTestInterface;
 use a9f\Fractor\Testing\Fixture\FixtureFileFinder;
 use a9f\Fractor\Testing\Fixture\FixtureSplitter;
+use a9f\Fractor\Testing\PHPUnit\ValueObject\FractorTestResult;
 use Nette\Utils\FileSystem;
+use Nette\Utils\Strings;
 use PHPUnit\Framework\TestCase;
 use Psr\Container\ContainerInterface;
 
@@ -30,8 +32,6 @@ abstract class AbstractFractorTestCase extends TestCase implements FractorTestIn
 
     private FractorRunner $fractorRunner;
 
-    private ?string $copiedFile = null;
-
     protected function setUp(): void
     {
         $this->bootContainer();
@@ -42,10 +42,8 @@ protected function setUp(): void
     protected function tearDown(): void
     {
         // clear temporary file
-        if (is_string($this->inputFilePath) && is_string($this->copiedFile)) {
+        if (\is_string($this->inputFilePath)) {
             FileSystem::delete($this->inputFilePath);
-            // restore copied file
-            FileSystem::rename($this->copiedFile, $this->inputFilePath);
         }
 
         unset($this->currentContainer);
@@ -93,9 +91,6 @@ protected static function yieldFilesFromDirectory(string $directory, string $suf
 
     protected function doTestFile(string $fixtureFilePath): void
     {
-        $this->copiedFile = $fixtureFilePath . '.tmp';
-
-        FileSystem::copy($fixtureFilePath, $this->copiedFile);
         // prepare input file contents and expected file output contents
         $fixtureFileContents = FileSystem::read($fixtureFilePath);
 
@@ -113,9 +108,8 @@ protected function doTestFile(string $fixtureFilePath): void
         $inputFilePath = $this->createInputFilePath($fixtureFilePath);
         // to remove later in tearDown()
         $this->inputFilePath = $inputFilePath;
-
-        if ($fixtureFilePath === $this->copiedFile) {
-            throw new ShouldNotHappenException('Fixture file and copied file cannot be the same: ' . $fixtureFilePath);
+        if ($fixtureFilePath === $inputFilePath) {
+            throw new ShouldNotHappenException('Fixture file and input file cannot be the same: ' . $fixtureFilePath);
         }
 
         // write temp file
@@ -127,9 +121,12 @@ protected function doTestFile(string $fixtureFilePath): void
     /**
      * @param class-string<FractorRule> $rule
      */
-    protected function assertThatRuleIsApplied(string $filePath, string $rule): void
+    protected function assertThatRuleIsApplied(string $rule): void
     {
-        $file = $this->fileCollector->getFileByPath($filePath);
+        if (! \is_string($this->inputFilePath)) {
+            self::fail('inputFilePath is not a string');
+        }
+        $file = $this->fileCollector->getFileByPath($this->inputFilePath);
         self::assertInstanceOf(File::class, $file);
         self::assertEquals([AppliedRule::fromClassString($rule)], $file->getAppliedRules());
     }
@@ -148,32 +145,46 @@ private function doTestFileMatchesExpectedContent(
         string $fixtureFilePath
     ): void {
         // the file is now changed (if any rule matches)
-        $changedContents = $this->processFilePath($originalFilePath);
+        $fractorTestResult = $this->processFilePath($originalFilePath);
+        $changedContents = $fractorTestResult->getChangedContents();
 
         $fixtureFilename = basename($fixtureFilePath);
         $failureMessage = sprintf('Failed on fixture file "%s"', $fixtureFilename);
+        // give more context about used rules in case of set testing
+        if (\count($fractorTestResult->getAppliedFractorRules()) > 0) {
+            $failureMessage .= \PHP_EOL . \PHP_EOL;
+            $failureMessage .= 'Applied Fractor rules:' . \PHP_EOL;
+            foreach ($fractorTestResult->getAppliedFractorRules() as $appliedFractorRule) {
+                $failureMessage .= ' * ' . $appliedFractorRule . \PHP_EOL;
+            }
+        }
 
         self::assertSame(trim($expectedFileContents), trim($changedContents), $failureMessage);
     }
 
-    private function processFilePath(string $filePath): string
+    private function processFilePath(string $filePath): FractorTestResult
     {
         $configurationFactory = $this->getService(ConfigurationFactory::class);
         $configuration = $configurationFactory->createForTests([$filePath]);
 
-        $this->fractorRunner->run(new NullOutput(), $configuration);
+        $processResult = $this->fractorRunner->run(new NullOutput(), $configuration);
 
         // return changed file contents
-        return FileSystem::read($filePath);
+        $changedFileContents = FileSystem::read($filePath);
+
+        return new FractorTestResult($changedFileContents, $processResult);
     }
 
     private function createInputFilePath(string $fixtureFilePath): string
     {
-        $inputFileDirectory = dirname($fixtureFilePath);
-
-        $trimmedFixtureFilePath = $fixtureFilePath;
-
-        $fixtureBasename = pathinfo($trimmedFixtureFilePath, PATHINFO_BASENAME);
+        $inputFileDirectory = \dirname($fixtureFilePath);
+        // remove ".fixture" suffix
+        if (str_ends_with($fixtureFilePath, '.fixture')) {
+            $trimmedFixtureFilePath = Strings::substring($fixtureFilePath, 0, -8);
+        } else {
+            $trimmedFixtureFilePath = $fixtureFilePath;
+        }
+        $fixtureBasename = \pathinfo($trimmedFixtureFilePath, \PATHINFO_BASENAME);
         return $inputFileDirectory . '/' . $fixtureBasename;
     }
 }
diff --git a/packages/fractor/src/Testing/PHPUnit/ValueObject/FractorTestResult.php b/packages/fractor/src/Testing/PHPUnit/ValueObject/FractorTestResult.php
new file mode 100644
index 00000000..d273c288
--- /dev/null
+++ b/packages/fractor/src/Testing/PHPUnit/ValueObject/FractorTestResult.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace a9f\Fractor\Testing\PHPUnit\ValueObject;
+
+use a9f\Fractor\ValueObject\ProcessResult;
+
+final readonly class FractorTestResult
+{
+    public function __construct(
+        private string $changedContents,
+        private ProcessResult $processResult
+    ) {
+    }
+
+    public function getChangedContents(): string
+    {
+        return $this->changedContents;
+    }
+
+    /**
+     * @return array<string>
+     */
+    public function getAppliedFractorRules(): array
+    {
+        $appliedRules = [];
+        foreach ($this->processResult->getFileDiffs() as $fileDiff) {
+            $appliedRules = \array_merge($appliedRules, $fileDiff->getAppliedRules());
+        }
+        \sort($appliedRules);
+        return \array_unique($appliedRules);
+    }
+}
diff --git a/packages/fractor/tests/Application/FractorRunner/Fixtures/my_text_file.txt b/packages/fractor/tests/Application/FractorRunner/Fixtures/my_text_file.txt.fixture
similarity index 100%
rename from packages/fractor/tests/Application/FractorRunner/Fixtures/my_text_file.txt
rename to packages/fractor/tests/Application/FractorRunner/Fixtures/my_text_file.txt.fixture
diff --git a/packages/fractor/tests/Application/FractorRunner/FractorRunnerTest.php b/packages/fractor/tests/Application/FractorRunner/FractorRunnerTest.php
index a204e920..24ea7426 100644
--- a/packages/fractor/tests/Application/FractorRunner/FractorRunnerTest.php
+++ b/packages/fractor/tests/Application/FractorRunner/FractorRunnerTest.php
@@ -18,7 +18,7 @@ public function test(string $filePath): void
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.txt');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.txt.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/Fixtures/fixture.html b/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/Fixtures/fixture.html.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/Fixtures/fixture.html
rename to packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/Fixtures/fixture.html.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/RemoveNoCacheHashAndUseCacheHashAttributeFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/RemoveNoCacheHashAndUseCacheHashAttributeFractorTest.php
index 4f6862ee..2290eaff 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/RemoveNoCacheHashAndUseCacheHashAttributeFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v10/Fluid/RemoveNoCacheHashAndUseCacheHashAttributeFluidFractor/RemoveNoCacheHashAndUseCacheHashAttributeFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/RemoveUseCacheHashFromTypolinkTypoScriptFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/RemoveUseCacheHashFromTypolinkTypoScriptFractorTest.php
index f8a7629e..f4043392 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/RemoveUseCacheHashFromTypolinkTypoScriptFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v10/TypoScript/RemoveUseCacheHashFromTypolinkTypoScriptFractor/RemoveUseCacheHashFromTypolinkTypoScriptFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/EmailFinisherYamlFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/EmailFinisherYamlFractorTest.php
index dda4cae0..9158652a 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/EmailFinisherYamlFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/EmailFinisherYamlFractorTest.php
@@ -18,7 +18,7 @@ public function test(string $filePath): void
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/my_form.form.yaml b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/my_form.form.yaml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/my_form.form.yaml
rename to packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/my_form.form.yaml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/some.form.yaml b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/some.form.yaml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/some.form.yaml
rename to packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/some.form.yaml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/Fixtures/form_setup.form.yaml b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/Fixtures/form_setup.form.yaml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/Fixtures/form_setup.form.yaml
rename to packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/Fixtures/form_setup.form.yaml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/TranslationFileYamlFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/TranslationFileYamlFractorTest.php
index 93dc05a4..32bece6c 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/TranslationFileYamlFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/TranslationFileYamlFractor/TranslationFileYamlFractorTest.php
@@ -18,7 +18,7 @@ public function test(string $filePath): void
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.yaml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/MigrateEmailFlagToEmailTypeFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/MigrateEmailFlagToEmailTypeFlexFormFractorTest.php
index b926af58..3b9e1703 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/MigrateEmailFlagToEmailTypeFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEmailFlagToEmailTypeFlexFormFractor/MigrateEmailFlagToEmailTypeFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractorTest.php
index b2a0ae79..5f3d4178 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractor/MigrateEvalIntAndDouble2ToTypeNumberFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/MigrateInternalTypeFolderToTypeFolderFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/MigrateInternalTypeFolderToTypeFolderFlexFormFractorTest.php
index 25fae21c..bda12d27 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/MigrateInternalTypeFolderToTypeFolderFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateInternalTypeFolderToTypeFolderFlexFormFractor/MigrateInternalTypeFolderToTypeFolderFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/Fixtures/fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/Fixtures/fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/Fixtures/fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/Fixtures/fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/MigrateItemsIndexedKeysToAssociativeFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/MigrateItemsIndexedKeysToAssociativeFractorTest.php
index 9737f94f..060d1e79 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/MigrateItemsIndexedKeysToAssociativeFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateItemsIndexedKeysToAssociativeFractor/MigrateItemsIndexedKeysToAssociativeFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/MigrateNullFlagFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/MigrateNullFlagFlexFormFractorTest.php
index cec0e191..e910bf59 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/MigrateNullFlagFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateNullFlagFlexFormFractor/MigrateNullFlagFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractorTest.php
index 50b9c4b3..51a872de 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractor/MigratePasswordAndSaltedPasswordToPasswordTypeFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/MigrateRenderTypeColorpickerToTypeColorFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/MigrateRenderTypeColorpickerToTypeColorFlexFormFractorTest.php
index fedfcd0a..ee9730bf 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/MigrateRenderTypeColorpickerToTypeColorFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRenderTypeColorpickerToTypeColorFlexFormFractor/MigrateRenderTypeColorpickerToTypeColorFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/MigrateRequiredFlagFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/MigrateRequiredFlagFlexFormFractorTest.php
index c64dfe12..675b8632 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/MigrateRequiredFlagFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateRequiredFlagFlexFormFractor/MigrateRequiredFlagFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/MigrateTypeNoneColsToSizeFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/MigrateTypeNoneColsToSizeFlexFormFractorTest.php
index e3e62354..4953ac21 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/MigrateTypeNoneColsToSizeFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/MigrateTypeNoneColsToSizeFlexFormFractor/MigrateTypeNoneColsToSizeFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/Fixture.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/Fixture.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/Fixture.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/Fixture.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/flexforms_no_change.xml b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/flexforms_no_change.xml.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/flexforms_no_change.xml
rename to packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/Fixtures/flexforms_no_change.xml.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/RemoveTceFormsDomElementFlexFormFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/RemoveTceFormsDomElementFlexFormFractorTest.php
index 1a32def6..debc8ad7 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/RemoveTceFormsDomElementFlexFormFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/FlexForm/RemoveTceFormsDomElementFlexFormFractor/RemoveTceFormsDomElementFlexFormFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.xml.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/AbstractMessageGetSeverityFluidFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/AbstractMessageGetSeverityFluidFractorTest.php
index 6a6320f3..9892b7db 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/AbstractMessageGetSeverityFluidFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/AbstractMessageGetSeverityFluidFractorTest.php
@@ -18,7 +18,7 @@ public function test(string $filePath): void
 
     public static function provideData(): Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.html.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/Fixtures/fixture.html b/packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/Fixtures/fixture.html.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/Fixtures/fixture.html
rename to packages/typo3-fractor/rules-tests/TYPO3v12/Fluid/AbstractMessageGetSeverityFluidFractor/Fixtures/fixture.html.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/RemoveConfigDisablePageExternalUrlFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/RemoveConfigDisablePageExternalUrlFractorTest.php
index 22671f4a..e82c8f0e 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/RemoveConfigDisablePageExternalUrlFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDisablePageExternalUrlFractor/RemoveConfigDisablePageExternalUrlFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/RemoveConfigDoctypeSwitchFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/RemoveConfigDoctypeSwitchFractorTest.php
index b6d3c98d..67b1b7e5 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/RemoveConfigDoctypeSwitchFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigDoctypeSwitchFractor/RemoveConfigDoctypeSwitchFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/RemoveConfigMetaCharsetFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/RemoveConfigMetaCharsetFractorTest.php
index 8419560b..3d0ef74d 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/RemoveConfigMetaCharsetFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigMetaCharsetFractor/RemoveConfigMetaCharsetFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractorTest.php
index c90ca174..cfcdd764 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractor/RemoveConfigSendCacheHeadersOnlyWhenLoginDeniedInBranchFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-keep.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-keep.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-keep.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-keep.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-remove.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-remove.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-remove.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/Fixtures/fixture-remove.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractorTest.php
index 09cc1ff8..e8056a56 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractor/RemoveConfigSpamProtectEmailAddressesAsciiOptionFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/RemoveNewContentElementWizardOptionsFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/RemoveNewContentElementWizardOptionsFractorTest.php
index 326db36c..d2516ad2 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/RemoveNewContentElementWizardOptionsFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveNewContentElementWizardOptionsFractor/RemoveNewContentElementWizardOptionsFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/RemoveWorkspaceModeOptionsFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/RemoveWorkspaceModeOptionsFractorTest.php
index 6e1d4a0d..23b9c701 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/RemoveWorkspaceModeOptionsFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RemoveWorkspaceModeOptionsFractor/RemoveWorkspaceModeOptionsFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/RenameConfigXhtmlDoctypeToDoctypeFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/RenameConfigXhtmlDoctypeToDoctypeFractorTest.php
index 8ff3d3a3..7c19a4b3 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/RenameConfigXhtmlDoctypeToDoctypeFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameConfigXhtmlDoctypeToDoctypeFractor/RenameConfigXhtmlDoctypeToDoctypeFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/RenameTcemainLinkHandlerMailKeyFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/RenameTcemainLinkHandlerMailKeyFractorTest.php
index 4f2e35c0..56c5eb62 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/RenameTcemainLinkHandlerMailKeyFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/RenameTcemainLinkHandlerMailKeyFractor/RenameTcemainLinkHandlerMailKeyFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/UseConfigArrayForTSFEPropertiesFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/UseConfigArrayForTSFEPropertiesFractorTest.php
index 0502ddfe..a0e16758 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/UseConfigArrayForTSFEPropertiesFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v12/TypoScript/UseConfigArrayForTSFEPropertiesFractor/UseConfigArrayForTSFEPropertiesFractorTest.php
@@ -20,7 +20,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/RemoveOptionAlternateBgColorsFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/RemoveOptionAlternateBgColorsFractorTest.php
index 32330b4b..3b63af1d 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/RemoveOptionAlternateBgColorsFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v7/TypoScript/RemoveOptionAlternateBgColorsFractor/RemoveOptionAlternateBgColorsFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/Fixtures/fixture.typoscript b/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/Fixtures/fixture.typoscript.fixture
similarity index 100%
rename from packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/Fixtures/fixture.typoscript
rename to packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/Fixtures/fixture.typoscript.fixture
diff --git a/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/RemoveModNewPageWizOverrideWithExtensionFractorTest.php b/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/RemoveModNewPageWizOverrideWithExtensionFractorTest.php
index 3bf60218..42a08a8c 100644
--- a/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/RemoveModNewPageWizOverrideWithExtensionFractorTest.php
+++ b/packages/typo3-fractor/rules-tests/TYPO3v8/TypoScript/RemoveModNewPageWizOverrideWithExtensionFractor/RemoveModNewPageWizOverrideWithExtensionFractorTest.php
@@ -17,7 +17,7 @@ public function test(string $filePath): void
 
     public static function provideData(): \Iterator
     {
-        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript');
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixtures', '*.typoscript.fixture');
     }
 
     public function provideConfigFilePath(): ?string