diff --git a/src/Fields/Checkbox.php b/src/Fields/Checkbox.php
index 076906e4..924c15ba 100644
--- a/src/Fields/Checkbox.php
+++ b/src/Fields/Checkbox.php
@@ -14,14 +14,11 @@ class Checkbox extends Select
      */
     public function newOption(mixed $value, string $label): Option
     {
-        $option = parent::newOption($value, $label);
-
-        $option->setAttributes([
-            'type' => 'checkbox',
-            'class' => 'form-check__control',
-            'name' => sprintf('%s[]', $this->getModelAttribute()),
-        ]);
-
-        return $option;
+        return parent::newOption($value, $label)
+            ->class('form-check__control')
+            ->setAttributes([
+                'type' => 'checkbox',
+                'name' => sprintf('%s[]', $this->getModelAttribute()),
+            ]);
     }
 }
diff --git a/src/Fields/Date.php b/src/Fields/Date.php
index 4a2b778e..46ad98e5 100644
--- a/src/Fields/Date.php
+++ b/src/Fields/Date.php
@@ -4,6 +4,9 @@
 
 use Closure;
 use DateTimeInterface;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Date as DateFactory;
 
 class Date extends Field
 {
@@ -29,7 +32,8 @@ public function __construct(string $label, Closure|string|null $modelAttribute =
     {
         parent::__construct($label, $modelAttribute);
 
-        $this->type('date')->step(1);
+        $this->type('date');
+        $this->step(1);
     }
 
     /**
@@ -37,7 +41,7 @@ public function __construct(string $label, Closure|string|null $modelAttribute =
      */
     public function min(string|DateTimeInterface $value): static
     {
-        return $this->setAttribute('min', (string) $value);
+        return $this->setAttribute('min', is_string($value) ? $value : $value->format('Y-m-d'));
     }
 
     /**
@@ -45,7 +49,7 @@ public function min(string|DateTimeInterface $value): static
      */
     public function max(string|DateTimeInterface $value): static
     {
-        return $this->setAttribute('max', (string) $value);
+        return $this->setAttribute('max', is_string($value) ? $value : $value->format('Y-m-d'));
     }
 
     /**
@@ -61,10 +65,10 @@ public function step(int $value): static
      */
     public function withTime(bool $value = true): static
     {
-        $this->format = $value ? 'Y-m-d H:i:s' : 'Y-m-d';
-
         $this->withTime = $value;
 
+        $this->format = $value ? 'Y-m-d H:i:s' : 'Y-m-d';
+
         $this->type($value ? 'datetime-local' : 'date');
 
         return $this;
@@ -79,4 +83,18 @@ public function timezone(?string $value = null): static
 
         return $this;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function resolveFormat(Request $request, Model $model): ?string
+    {
+        if (is_null($this->formatResolver)) {
+            $this->formatResolver = function (Request $request, Model $model, mixed $value): ?string {
+                return is_null($value) ? $value : DateFactory::parse($value)->tz($this->timezone)->format($this->format);
+            };
+        }
+
+        return parent::resolveFormat($request, $model);
+    }
 }
diff --git a/src/Support/ClassList.php b/src/Support/ClassList.php
index 8cb726b9..d9e3ec3d 100644
--- a/src/Support/ClassList.php
+++ b/src/Support/ClassList.php
@@ -26,8 +26,10 @@ public function __construct(array $classes = [])
      */
     public function add(string|array $value): static
     {
+        $value = is_array($value) ? $value : explode(' ', $value);
+
         $this->classes = array_values(array_unique(
-            array_merge($this->classes, (array) $value)
+            array_merge($this->classes, $value)
         ));
 
         return $this;
diff --git a/src/Traits/HasAttributes.php b/src/Traits/HasAttributes.php
index aee77538..f15961c5 100644
--- a/src/Traits/HasAttributes.php
+++ b/src/Traits/HasAttributes.php
@@ -89,7 +89,7 @@ public function getAttribute(string $key, mixed $default = null): mixed
     public function setAttribute(string $key, mixed $value): static
     {
         match ($key) {
-            'class' => $this->classList()->clear()->add((array) $value),
+            'class' => $this->classList()->clear()->add($value),
             default => $this->attributes[$key] = $value,
         };
 
diff --git a/tests/Fields/BooleanTest.php b/tests/Fields/BooleanTest.php
index b52e8607..7e6c461b 100644
--- a/tests/Fields/BooleanTest.php
+++ b/tests/Fields/BooleanTest.php
@@ -18,6 +18,11 @@ public function setUp(): void
         $this->field = new Boolean('Admin');
     }
 
+    public function test_a_boolean_field_has_boolean_template(): void
+    {
+        $this->assertSame('root::fields.boolean', $this->field->getTemplate());
+    }
+
     public function test_a_boolean_field_has_checkbox_type(): void
     {
         $this->assertSame('checkbox', $this->field->getAttribute('type'));
@@ -34,11 +39,6 @@ public function test_a_boolean_field_has_checked_attribute(): void
         $this->assertFalse($this->field->getAttribute('checked'));
     }
 
-    public function test_a_boolean_field_has_boolean_template(): void
-    {
-        $this->assertSame('root::fields.boolean', $this->field->getTemplate());
-    }
-
     public function test_a_boolean_field_gets_value_for_hydrate(): void
     {
         $request = Request::createFrom($this->app['request']);
diff --git a/tests/Fields/CheckboxTest.php b/tests/Fields/CheckboxTest.php
new file mode 100644
index 00000000..cb62c9c7
--- /dev/null
+++ b/tests/Fields/CheckboxTest.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Cone\Root\Tests\Fields;
+
+use Cone\Root\Fields\Checkbox;
+use Cone\Root\Tests\TestCase;
+
+class CheckboxTest extends TestCase
+{
+    protected Checkbox $field;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->field = new Checkbox('Permissions');
+    }
+
+    public function test_a_checkbox_field_makes_new_option(): void
+    {
+        $option = $this->field->newOption('test', 'Test');
+
+        $this->assertTrue(
+            empty(array_diff(['value' => 'test'], $option->jsonSerialize()))
+        );
+    }
+}
diff --git a/tests/Fields/ColorTest.php b/tests/Fields/ColorTest.php
new file mode 100644
index 00000000..7a12cfeb
--- /dev/null
+++ b/tests/Fields/ColorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Cone\Root\Tests\Fields;
+
+use Cone\Root\Fields\Color;
+use Cone\Root\Tests\TestCase;
+
+class ColorTest extends TestCase
+{
+    protected Color $field;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->field = new Color('Primary');
+    }
+
+    public function test_a_color_field_has_color_type(): void
+    {
+        $this->assertSame('color', $this->field->getAttribute('type'));
+    }
+}
diff --git a/tests/Fields/DateTest.php b/tests/Fields/DateTest.php
new file mode 100644
index 00000000..caeb4051
--- /dev/null
+++ b/tests/Fields/DateTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Cone\Root\Tests\Fields;
+
+use Cone\Root\Fields\Date;
+use Cone\Root\Tests\TestCase;
+use Cone\Root\Tests\User;
+use Illuminate\Support\Facades\Date as DateFactory;
+
+class DateTest extends TestCase
+{
+    protected Date $field;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->field = new Date('Created At');
+    }
+
+    public function test_a_date_field_has_date_type(): void
+    {
+        $this->assertSame('date', $this->field->getAttribute('type'));
+        $this->assertSame(1, $this->field->getAttribute('step'));
+    }
+
+    public function test_date_has_min_max_attributes(): void
+    {
+        $this->assertNull($this->field->getAttribute('min'));
+
+        $date = DateFactory::now();
+
+        $this->field->min($date);
+        $this->assertSame($date->format('Y-m-d'), $this->field->getAttribute('min'));
+
+        $this->field->max($date);
+        $this->assertSame($date->format('Y-m-d'), $this->field->getAttribute('max'));
+    }
+
+    public function test_a_date_field_has_time(): void
+    {
+        $model = new User();
+
+        $now = DateFactory::now();
+
+        $model->setAttribute('created_at', $now);
+
+        $this->assertSame($now->format('Y-m-d'), $this->field->resolveFormat($this->app['request'], $model));
+
+        $this->field->withTime();
+        $this->assertSame('datetime-local', $this->field->getAttribute('type'));
+        $this->assertSame($now->format('Y-m-d H:i:s'), $this->field->resolveFormat($this->app['request'], $model));
+    }
+}