diff --git a/packages/database/src/Config/DatabaseDialect.php b/packages/database/src/Config/DatabaseDialect.php
index 35faa382d..157755b13 100644
--- a/packages/database/src/Config/DatabaseDialect.php
+++ b/packages/database/src/Config/DatabaseDialect.php
@@ -33,7 +33,7 @@ public function encloseExpressionDefault(string $expression): string
     {
         return match ($this) {
             self::MYSQL => sprintf('(%s)', $expression),
-            default => sprintf('%s', $expression),
+            default => $expression,
         };
     }
 
diff --git a/packages/database/src/IsDatabaseModel.php b/packages/database/src/IsDatabaseModel.php
index 311007f2c..d2b441884 100644
--- a/packages/database/src/IsDatabaseModel.php
+++ b/packages/database/src/IsDatabaseModel.php
@@ -279,7 +279,7 @@ public function query(string $relation): QueryBuilder
 
         $resolved = $model->getRelation(name: $relation);
 
-        if ($resolved === null) {
+        if (! $resolved instanceof Relation) {
             throw new PropertyWasNotARelation(property: $relation, model: $model->getName());
         }
 
diff --git a/packages/database/tests/QueryStatements/CharStatementTest.php b/packages/database/tests/QueryStatements/CharStatementTest.php
index f92dba422..0e9e8d663 100644
--- a/packages/database/tests/QueryStatements/CharStatementTest.php
+++ b/packages/database/tests/QueryStatements/CharStatementTest.php
@@ -20,7 +20,7 @@ public function test_char(): void
             default: '019d38a9-5504-7a16-ab9d-520bbc289ecc',
         );
 
-        $expectedMysql = '`foo` CHAR(36) DEFAULT \'019d38a9-5504-7a16-ab9d-520bbc289ecc\' NOT NULL';
+        $expectedMysql = "`foo` CHAR(36) DEFAULT '019d38a9-5504-7a16-ab9d-520bbc289ecc' NOT NULL";
         $expectedPgsql = '"foo" CHAR(36) DEFAULT \'019d38a9-5504-7a16-ab9d-520bbc289ecc\' NOT NULL';
 
         $this->assertSame($expectedMysql, $statement->compile(DatabaseDialect::MYSQL));
@@ -41,7 +41,7 @@ public function test_determine_char_size(): void
             name: 'foo',
             default: 'foo_bar',
         );
-        $expectedMysql = '`foo` CHAR(7) DEFAULT \'foo_bar\' NOT NULL';
+        $expectedMysql = "`foo` CHAR(7) DEFAULT 'foo_bar' NOT NULL";
         $this->assertSame($expectedMysql, $defaultSizeStatement->compile(DatabaseDialect::MYSQL));
 
         $fixedAndDefaultSizeStatement = new CharStatement(
@@ -49,7 +49,7 @@ public function test_determine_char_size(): void
             size: 7,
             default: 'foo_bar',
         );
-        $expectedMysql = '`foo` CHAR(7) DEFAULT \'foo_bar\' NOT NULL';
+        $expectedMysql = "`foo` CHAR(7) DEFAULT 'foo_bar' NOT NULL";
         $this->assertSame($expectedMysql, $fixedAndDefaultSizeStatement->compile(DatabaseDialect::MYSQL));
     }
 
@@ -73,7 +73,7 @@ public function test_char_size_greater_than_default_value_length(): void
             size: 10,
             default: 'foo_bar',
         );
-        $expectedMysql = '`foo` CHAR(10) DEFAULT \'foo_bar\' NOT NULL';
+        $expectedMysql = "`foo` CHAR(10) DEFAULT 'foo_bar' NOT NULL";
         $this->assertSame($expectedMysql, $statement->compile(DatabaseDialect::MYSQL));
     }
 }
diff --git a/packages/database/tests/QueryStatements/DateStatementTest.php b/packages/database/tests/QueryStatements/DateStatementTest.php
index c58d84cb8..d265bab1c 100644
--- a/packages/database/tests/QueryStatements/DateStatementTest.php
+++ b/packages/database/tests/QueryStatements/DateStatementTest.php
@@ -2,6 +2,7 @@
 
 namespace Tempest\Database\Tests\QueryStatements;
 
+use InvalidArgumentException;
 use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
 use Tempest\Database\Config\DatabaseDialect;
@@ -17,7 +18,7 @@ public function test_date(): void
             default: '2026-01-01',
         );
 
-        $expectedMysql = '`foo` DATE DEFAULT \'2026-01-01\' NOT NULL';
+        $expectedMysql = "`foo` DATE DEFAULT '2026-01-01' NOT NULL";
         $expectedPgsql = '"foo" DATE DEFAULT \'2026-01-01\' NOT NULL';
 
         $this->assertSame($expectedMysql, $statement->compile(DatabaseDialect::MYSQL));
@@ -43,7 +44,7 @@ public function test_date_with_current(): void
     #[Test]
     public function test_date_with_default_and_current(): void
     {
-        $this->expectException(\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
 
         $statement = new DateStatement(
             name: 'foo',
diff --git a/packages/discovery/src/Composer.php b/packages/discovery/src/Composer.php
index 5230c1b77..8b7598ddb 100644
--- a/packages/discovery/src/Composer.php
+++ b/packages/discovery/src/Composer.php
@@ -6,6 +6,7 @@
 
 use Tempest\Process\ProcessExecutor;
 use Tempest\Support\Arr;
+use Tempest\Support\Arr\ImmutableArray;
 use Tempest\Support\Filesystem;
 use Tempest\Support\Namespace\Psr4Namespace;
 use Tempest\Support\Path;
@@ -50,7 +51,7 @@ public function load(): self
             $this->mainNamespace = $this->namespaces[0];
         }
 
-        $this->namespaces = new Arr\ImmutableArray([$this->mainNamespace, ...$this->namespaces])
+        $this->namespaces = new ImmutableArray([$this->mainNamespace, ...$this->namespaces])
             ->filter()
             ->unique(fn (Psr4Namespace $ns) => "{$ns->namespace}:{$ns->path}")
             ->toArray();
@@ -120,8 +121,8 @@ private function loadComposerFile(string $path): array
     /** @return array<Psr4Namespace> */
     private function resolvePsr4Namespaces(string $path): array
     {
-        return new Arr\ImmutableArray($this->composer)
-            ->get($path, default: new Arr\ImmutableArray())
+        return new ImmutableArray($this->composer)
+            ->get($path, default: new ImmutableArray())
             ->flatMap(fn (string|iterable $paths, string $namespace) => Arr\map(Arr\wrap($paths), fn (string $path) => new Psr4Namespace($namespace, $path)))
             ->sortByCallback(fn (Psr4Namespace $ns1, Psr4Namespace $ns2) => strlen($ns1->path) <=> strlen($ns2->path))
             ->values()
diff --git a/packages/mapper/src/Casters/BooleanCaster.php b/packages/mapper/src/Casters/BooleanCaster.php
index 14facfc11..810b792a7 100644
--- a/packages/mapper/src/Casters/BooleanCaster.php
+++ b/packages/mapper/src/Casters/BooleanCaster.php
@@ -39,7 +39,7 @@ public function cast(mixed $input): ?bool
             $input = mb_strtolower(trim($input));
         }
 
-        if ($this->nullable && ($input === null || $input === '' || $input === 'null')) {
+        if ($this->nullable && in_array($input, [null, '', 'null'], true)) {
             return null;
         }
 
diff --git a/packages/mapper/src/Casters/FloatCaster.php b/packages/mapper/src/Casters/FloatCaster.php
index 97063002d..20960b2ca 100644
--- a/packages/mapper/src/Casters/FloatCaster.php
+++ b/packages/mapper/src/Casters/FloatCaster.php
@@ -39,7 +39,7 @@ public function cast(mixed $input): ?float
             $input = mb_strtolower(trim($input));
         }
 
-        if ($this->nullable && ($input === null || $input === '' || $input === 'null')) {
+        if ($this->nullable && in_array($input, [null, '', 'null'], true)) {
             return null;
         }
 
diff --git a/packages/mapper/src/Casters/IntegerCaster.php b/packages/mapper/src/Casters/IntegerCaster.php
index bd8f41af3..893bdd493 100644
--- a/packages/mapper/src/Casters/IntegerCaster.php
+++ b/packages/mapper/src/Casters/IntegerCaster.php
@@ -39,7 +39,7 @@ public function cast(mixed $input): ?int
             $input = mb_strtolower(trim($input));
         }
 
-        if ($this->nullable && ($input === null || $input === '' || $input === 'null')) {
+        if ($this->nullable && in_array($input, [null, '', 'null'], true)) {
             return null;
         }
 
diff --git a/packages/upgrade/src/Tempest310/UpdatePriorityImportsRector.php b/packages/upgrade/src/Tempest310/UpdatePriorityImportsRector.php
index 4919860c6..5cf7876da 100644
--- a/packages/upgrade/src/Tempest310/UpdatePriorityImportsRector.php
+++ b/packages/upgrade/src/Tempest310/UpdatePriorityImportsRector.php
@@ -11,6 +11,7 @@
 final class UpdatePriorityImportsRector extends AbstractRector
 {
     private const string OLD_CLASS = 'Tempest\Core\Priority';
+
     private const string NEW_CLASS = 'Tempest\Support\Priority';
 
     public function getNodeTypes(): array
diff --git a/tests/Integration/Core/FrameworkKernelExceptionHandlerTest.php b/tests/Integration/Core/FrameworkKernelExceptionHandlerTest.php
index 25de2f31b..cbb6f6166 100644
--- a/tests/Integration/Core/FrameworkKernelExceptionHandlerTest.php
+++ b/tests/Integration/Core/FrameworkKernelExceptionHandlerTest.php
@@ -53,6 +53,7 @@ public function warnings_notices_and_deprecations_are_processed_without_throwing
 
         $this->container->singleton(ExceptionHandler::class, new TestingExceptionHandler());
         $this->container->singleton(ExceptionProcessor::class, $processor = new TestingExceptionProcessor());
+
         $this->kernel->registerExceptionHandler();
 
         try {
@@ -60,7 +61,7 @@ public function warnings_notices_and_deprecations_are_processed_without_throwing
             trigger_error('report deprecation', E_USER_DEPRECATED);
             trigger_error('report notice', E_USER_NOTICE);
         } catch (Throwable $throwable) {
-            $this->fail(sprintf('Expected no exception to be thrown, but got %s: %s', get_class($throwable), $throwable->getMessage()));
+            $this->fail(sprintf('Expected no exception to be thrown, but got %s: %s', $throwable::class, $throwable->getMessage()));
         }
 
         $this->assertCount(3, $processor->processed);
@@ -91,6 +92,7 @@ public function suppressions_are_not_processed_or_thrown(): void
 
         $this->container->singleton(ExceptionHandler::class, new TestingExceptionHandler());
         $this->container->singleton(ExceptionProcessor::class, $processor = new TestingExceptionProcessor());
+
         $this->kernel->registerExceptionHandler();
 
         @trigger_error('suppressed warning', E_USER_WARNING);
@@ -109,6 +111,7 @@ public function uncaught_exceptions_are_forwarded_to_the_registered_exception_ha
 
         $this->container->singleton(ExceptionHandler::class, $handler);
         $this->container->singleton(ExceptionProcessor::class, new TestingExceptionProcessor());
+
         $this->kernel->registerExceptionHandler();
 
         $kernelExceptionHandler = set_exception_handler(static function (Throwable $throwable): void {});