diff --git a/src/Configuration/Defaults/CommonRules.php b/src/Configuration/Defaults/CommonRules.php
index 02a2713..bb61967 100644
--- a/src/Configuration/Defaults/CommonRules.php
+++ b/src/Configuration/Defaults/CommonRules.php
@@ -26,6 +26,7 @@
 use PhpCsFixer\Fixer\ClassNotation\SingleTraitInsertPerStatementFixer;
 use PhpCsFixer\Fixer\ClassNotation\VisibilityRequiredFixer;
 use PhpCsFixer\Fixer\Comment\NoTrailingWhitespaceInCommentFixer;
+use PhpCsFixer\Fixer\Comment\SingleLineCommentSpacingFixer;
 use PhpCsFixer\Fixer\ControlStructure\NoUnneededControlParenthesesFixer;
 use PhpCsFixer\Fixer\ControlStructure\NoUnneededCurlyBracesFixer;
 use PhpCsFixer\Fixer\ControlStructure\NoUselessElseFixer;
@@ -42,10 +43,12 @@
 use PhpCsFixer\Fixer\Import\NoLeadingImportSlashFixer;
 use PhpCsFixer\Fixer\Import\NoUnusedImportsFixer;
 use PhpCsFixer\Fixer\Import\OrderedImportsFixer;
+use PhpCsFixer\Fixer\Import\SingleLineAfterImportsFixer;
 use PhpCsFixer\Fixer\LanguageConstruct\DeclareEqualNormalizeFixer;
 use PhpCsFixer\Fixer\LanguageConstruct\ExplicitIndirectVariableFixer;
 use PhpCsFixer\Fixer\LanguageConstruct\FunctionToConstantFixer;
 use PhpCsFixer\Fixer\LanguageConstruct\IsNullFixer;
+use PhpCsFixer\Fixer\NamespaceNotation\BlankLineAfterNamespaceFixer;
 use PhpCsFixer\Fixer\NamespaceNotation\CleanNamespaceFixer;
 use PhpCsFixer\Fixer\NamespaceNotation\NoLeadingNamespaceWhitespaceFixer;
 use PhpCsFixer\Fixer\NamespaceNotation\SingleBlankLineBeforeNamespaceFixer;
@@ -241,5 +244,8 @@ class CommonRules extends Rules
         FunctionDeclarationFixer::class => [
             "closure_function_spacing" => "none",
         ],
+        SingleLineAfterImportsFixer::class => true,
+        SingleLineCommentSpacingFixer::class => true,
+        BlankLineAfterNamespaceFixer::class => true,
     ];
 }
diff --git a/tests/codestyle/CodestyleTest.php b/tests/codestyle/CodestyleTest.php
index 2e35648..3ae01a2 100644
--- a/tests/codestyle/CodestyleTest.php
+++ b/tests/codestyle/CodestyleTest.php
@@ -35,12 +35,13 @@ public function testPhp80Fixtures(): void
             "unionTypes",
             "references",
             "classAttributesSeparation",
-            "noUselessParenthesisFixer",
+            "uselessParenthesis",
             "laravelMigrations",
             "phpdocs",
             "yodaStyle",
             "objectOperators",
             "anonymousFunctions",
+            "namespaces",
         ];
 
         foreach ($fixtures as $fixture) {
diff --git a/tests/codestyle/fixtures/namespaces/actual.php b/tests/codestyle/fixtures/namespaces/actual.php
new file mode 100644
index 0000000..ca4ac50
--- /dev/null
+++ b/tests/codestyle/fixtures/namespaces/actual.php
@@ -0,0 +1,6 @@
+<?php
+declare(strict_types=1);
+namespace Test;
+class Test
+{
+}
diff --git a/tests/codestyle/fixtures/namespaces/expected.php b/tests/codestyle/fixtures/namespaces/expected.php
new file mode 100644
index 0000000..e383cad
--- /dev/null
+++ b/tests/codestyle/fixtures/namespaces/expected.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Test;
+
+class Test
+{
+}
diff --git a/tests/codestyle/fixtures/noUselessParenthesisFixer/actual.php b/tests/codestyle/fixtures/uselessParenthesis/actual.php
similarity index 100%
rename from tests/codestyle/fixtures/noUselessParenthesisFixer/actual.php
rename to tests/codestyle/fixtures/uselessParenthesis/actual.php
diff --git a/tests/codestyle/fixtures/noUselessParenthesisFixer/expected.php b/tests/codestyle/fixtures/uselessParenthesis/expected.php
similarity index 100%
rename from tests/codestyle/fixtures/noUselessParenthesisFixer/expected.php
rename to tests/codestyle/fixtures/uselessParenthesis/expected.php