diff --git a/sage_qrcode/models/barcode.py b/sage_qrcode/models/barcode.py
index 03274d2..c6dc5a9 100644
--- a/sage_qrcode/models/barcode.py
+++ b/sage_qrcode/models/barcode.py
@@ -11,6 +11,7 @@ class Barcode(PolymorphicModel, TimeStampMixin):
     """Abstract base class for all QR code types."""
 
     bar_code_image = models.ImageField(
+        verbose_name=_("Bar Code Image"),
         upload_to="bar_codes/",
         blank=True,
         null=True,
@@ -20,6 +21,7 @@ class Barcode(PolymorphicModel, TimeStampMixin):
     )
 
     title = models.CharField(
+        verbose_name=_("Title"),
         max_length=255,
         null=True,
         blank=True,
@@ -28,17 +30,21 @@ class Barcode(PolymorphicModel, TimeStampMixin):
     )
 
     color = ColorField(
+        verbose_name=_("Color"),
         format="hex",
-        help_text=_("Color of the BAR code."),
+        default="#000000",
         null=True,
         blank=True,
+        help_text=_("Color of the BAR code."),
         db_comment="The color of the BAR code in hexadecimal format.",
     )
     second_color = ColorField(
+        verbose_name=_("Second Color"),
         format="hex",
-        help_text=_("Second color of the QR code."),
+        default="##FFFFFF",
         null=True,
         blank=True,
+        help_text=_("Second color of the QR code."),
         db_comment="The second color of the BAR code in hexadecimal format.",
     )
 
@@ -63,9 +69,9 @@ class BarcodeUrl(Barcode):
     """
 
     url = models.URLField(
+        verbose_name=_("barcode URL"),
         help_text=_("URL of the barcode content."),
         db_comment="The URL of the barcode content.",
-        verbose_name=_("barcode URL"),
     )
 
     def __str__(self):
@@ -90,10 +96,10 @@ class BarcodeText(Barcode):
     """
 
     body = models.TextField(
+        verbose_name=_("body"),
         blank=True,
         help_text=_("Body of the barcode."),
         db_comment="The body of the barcode.",
-        verbose_name=_("body"),
     )
 
     def __str__(self):
diff --git a/sage_qrcode/models/bitcoin.py b/sage_qrcode/models/bitcoin.py
index 2a9df0a..20f53b0 100644
--- a/sage_qrcode/models/bitcoin.py
+++ b/sage_qrcode/models/bitcoin.py
@@ -15,13 +15,14 @@ class BitcoinQRCode(QRCode):
     """
 
     bitcoin_address = models.CharField(
+        verbose_name=_("Bitcoin Address"),
         max_length=34,
         validators=[validate_bitcoin_address],
         help_text=_("Bitcoin address. Example: '1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa'"),
         db_comment="The Bitcoin address for the payment.",
-        verbose_name=_("Bitcoin Address"),
     )
     amount = models.DecimalField(
+        verbose_name=_("Amount"),
         max_digits=10,
         decimal_places=8,
         null=False,
@@ -29,20 +30,19 @@ class BitcoinQRCode(QRCode):
         validators=[MinValueValidator(0.00000001)],
         help_text=_("Amount of Bitcoin to send. Example: '0.01'"),
         db_comment="The amount of Bitcoin to send.",
-        verbose_name=_("Amount"),
     )
     label = models.CharField(
+        verbose_name=_("Label"),
         max_length=255,
         blank=True,
         help_text=_("Label for the transaction."),
         db_comment="An optional label for the transaction.",
-        verbose_name=_("Label"),
     )
     message = models.TextField(
+        verbose_name=_("Message"),
         blank=True,
         help_text=_("Message for the transaction."),
         db_comment="An optional message for the transaction.",
-        verbose_name=_("Message"),
     )
 
     def __str__(self):
diff --git a/sage_qrcode/models/card.py b/sage_qrcode/models/card.py
index f7e9ccd..0ad8ddc 100644
--- a/sage_qrcode/models/card.py
+++ b/sage_qrcode/models/card.py
@@ -15,56 +15,56 @@ class VCardQRCode(QRCode):
     """
 
     full_name = models.CharField(
+        verbose_name=_("Full Name"),
         max_length=255,
         help_text=_("Full name of the individual."),
         db_comment="The name of the individual represented in the VCard QR code.",
-        verbose_name=_("Full Name"),
     )
     display_name = models.CharField(
+        verbose_name=_("Display Name"),
         max_length=255,
         null=True,
         blank=True,
         help_text=_("Display name of the individual."),
         db_comment="An optional display name for the individual.",
-        verbose_name=_("Display Name"),
     )
     email = models.EmailField(
+        verbose_name=_("Email"),
         null=True,
         blank=True,
         help_text=_("Email address of the individual."),
         db_comment="The email address of the individual.",
-        verbose_name=_("Email"),
     )
     phone = models.CharField(
+        verbose_name=_("Phone Number"),
         max_length=20,
         null=True,
         blank=True,
         validators=[validate_phone_number],
         help_text=_("Phone number of the individual."),
         db_comment="The phone number of the individual.",
-        verbose_name=_("Phone Number"),
     )
     url = models.URLField(
+        verbose_name=_("Website URL"),
         null=True,
         blank=True,
         help_text=_("URL of the individual's website or profile."),
         db_comment="The URL to the individual's website or profile.",
-        verbose_name=_("Website URL"),
     )
     org = models.CharField(
+        verbose_name=_("Organization"),
         max_length=255,
         null=True,
         blank=True,
         help_text=_("Name of the organization."),
         db_comment="The organization name associated with the individual.",
-        verbose_name=_("Organization"),
     )
     address = models.TextField(
+        verbose_name=_("Address"),
         null=True,
         blank=True,
         help_text=_("Physical address of the individual."),
         db_comment="The physical address of the individual.",
-        verbose_name=_("Address"),
     )
     phone_number = models.CharField(
         _("Phone Number"),
diff --git a/sage_qrcode/models/epc.py b/sage_qrcode/models/epc.py
index 7876a7e..f9d4438 100644
--- a/sage_qrcode/models/epc.py
+++ b/sage_qrcode/models/epc.py
@@ -15,31 +15,31 @@ class EPCQRCode(QRCode):
     """
 
     name = models.CharField(
+        verbose_name=_("Beneficiary Name"),
         max_length=255,
         help_text=_("Name of the EPC beneficiary."),
         db_comment="The name of the beneficiary for the EPC QR code.",
-        verbose_name=_("Beneficiary Name"),
     )
     iban = models.CharField(
+        verbose_name=_("IBAN"),
         max_length=34,
         validators=[validate_iban],
         help_text=_("IBAN of the EPC beneficiary."),
         db_comment="The IBAN of the beneficiary for the EPC QR code.",
-        verbose_name=_("IBAN"),
     )
     amount = models.DecimalField(
+        verbose_name=_("Payment Amount"),
         max_digits=10,
         decimal_places=2,
         validators=[MinValueValidator(0.01)],
         help_text=_("Payment amount."),
         db_comment="The amount to be paid using the EPC QR code.",
-        verbose_name=_("Payment Amount"),
     )
     text = models.TextField(
+        verbose_name=_("Additional Text"),
         blank=True,
         help_text=_("Additional text for the EPC QR code."),
         db_comment="Optional additional text for the EPC QR code.",
-        verbose_name=_("Additional Text"),
     )
 
     def __str__(self):
diff --git a/sage_qrcode/models/qrcode.py b/sage_qrcode/models/qrcode.py
index 6e64012..ee1f359 100644
--- a/sage_qrcode/models/qrcode.py
+++ b/sage_qrcode/models/qrcode.py
@@ -11,6 +11,7 @@ class QRCode(PolymorphicModel, TimeStampMixin):
     """Abstract base class for all QR code types."""
 
     qr_code_image = models.ImageField(
+        verbose_name=_("QR Code Image"),
         upload_to="qr_codes/",
         blank=True,
         null=True,
@@ -19,6 +20,7 @@ class QRCode(PolymorphicModel, TimeStampMixin):
         db_comment="The image file of the generated QR code.",
     )
     custom_gif = models.ImageField(
+        verbose_name=_("Custom GIF"),
         upload_to="custom_gifs/",
         blank=True,
         null=True,
@@ -27,6 +29,7 @@ class QRCode(PolymorphicModel, TimeStampMixin):
         db_comment="An optional custom GIF that can be embedded in the QR code.",
     )
     title = models.CharField(
+        verbose_name=_("Title"),
         max_length=255,
         null=True,
         blank=True,
@@ -34,32 +37,36 @@ class QRCode(PolymorphicModel, TimeStampMixin):
         db_comment="A descriptive title for the QR code.",
     )
     size = models.PositiveSmallIntegerField(
+        verbose_name=_("Size"),
         validators=[validate_size],
-        help_text=_("Size of the QR code image."),
         null=True,
         blank=True,
+        help_text=_("Size of the QR code image."),
         db_comment="The size (dimensions) of the QR code image.",
     )
     color = ColorField(
+        verbose_name=_("Color"),
         format="hex",
-        help_text=_("Color of the QR code."),
         null=True,
         blank=True,
+        help_text=_("Color of the QR code."),
         db_comment="The color of the QR code in hexadecimal format.",
     )
     second_color = ColorField(
+        verbose_name=_("Second Color"),
         format="hex",
-        help_text=_("Second color of the QR code."),
         null=True,
         blank=True,
+        help_text=_("Second color of the QR code."),
         db_comment="The second color of the QR code in hexadecimal format.",
     )
 
     third_color = ColorField(
+        verbose_name=_("Third Color"),
         format="hex",
-        help_text=_("Third color of the QR code."),
         null=True,
         blank=True,
+        help_text=_("Third color of the QR code."),
         db_comment="The third color of the BAR code in hexadecimal format.",
     )
 
diff --git a/sage_qrcode/models/social_media.py b/sage_qrcode/models/social_media.py
index 8aec5c1..63056dd 100644
--- a/sage_qrcode/models/social_media.py
+++ b/sage_qrcode/models/social_media.py
@@ -23,17 +23,17 @@ class WhatsAppQRCode(QRCode):
     """
 
     phone_number = models.CharField(
+        verbose_name=_("WhatsApp Phone Number"),
         max_length=20,
         validators=[validate_phone_number],
         help_text=_("WhatsApp phone number. Example: +1234567890"),
         db_comment="The WhatsApp phone number.",
-        verbose_name=_("WhatsApp Phone Number"),
     )
     message = models.TextField(
+        verbose_name=_("Message"),
         blank=True,
         help_text=_("Message to be sent. Example: 'Hello, this is a test message.'"),
         db_comment="The message to be sent via WhatsApp.",
-        verbose_name=_("Message"),
     )
 
     def __str__(self):
@@ -54,12 +54,12 @@ class Meta:
 
 class SkypeQRCode(QRCode):
     url = models.URLField(
+        verbose_name=_("Skype URL"),
+        validators=[validate_skype],
         help_text=_(
             "URL of the Skype profile. Example: 'https://www.skype.com/username'"
         ),
-        validators=[validate_skype],
         db_comment="The URL of the Skype profile.",
-        verbose_name=_("Skype URL"),
     )
 
     def __str__(self):
@@ -84,12 +84,12 @@ class TikTokQRCode(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("TikTok URL"),
+        validators=[validate_tiktok],
         help_text=_(
             "URL of the TikTok profile. Example: 'https://www.tiktok.com/@username'"
         ),
-        validators=[validate_tiktok],
         db_comment="The URL of the TikTok profile.",
-        verbose_name=_("TikTok URL"),
     )
 
     def __str__(self):
@@ -114,12 +114,12 @@ class SnapchatQRCode(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("Snapchat URL"),
+        validators=[validate_snapchat],
         help_text=_(
             "URL of the Snapchat profile. Example: 'https://www.snapchat.com/add/username'"
         ),
-        validators=[validate_snapchat],
         db_comment="The URL of the Snapchat profile.",
-        verbose_name=_("Snapchat URL"),
     )
 
     def __str__(self):
@@ -144,12 +144,12 @@ class InstagramQRCode(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("Instagram URL"),
+        validators=[validate_instagram],
         help_text=_(
             "URL of the Instagram profile. Example: 'https://www.instagram.com/username'"
         ),
-        validators=[validate_instagram],
         db_comment="The URL of the Instagram profile.",
-        verbose_name=_("Instagram URL"),
     )
 
     def __str__(self):
@@ -174,12 +174,12 @@ class FacebookQRCode(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("Facebook URL"),
+        validators=[validate_facebook],
         help_text=_(
             "URL of the Facebook profile. Example: 'https://www.facebook.com/username'"
         ),
-        validators=[validate_facebook],
         db_comment="The URL of the Facebook profile.",
-        verbose_name=_("Facebook URL"),
     )
 
     def __str__(self):
@@ -204,10 +204,10 @@ class TelegramQRCode(QRCode):
     """
 
     url = models.URLField(
-        help_text=_("URL of the Telegram profile. Example: 'https://t.me/username'"),
+        verbose_name=_("Telegram URL"),
         validators=[validate_telegram],
+        help_text=_("URL of the Telegram profile. Example: 'https://t.me/username'"),
         db_comment="The URL of the Telegram profile.",
-        verbose_name=_("Telegram URL"),
     )
 
     def __str__(self):
@@ -232,12 +232,12 @@ class LinkedInQRCode(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("LinkedIn URL"),
+        validators=[validate_linkedin],
         help_text=_(
             "URL of the LinkedIn profile. Example: 'https://www.linkedin.com/in/username'"
         ),
-        validators=[validate_linkedin],
         db_comment="The URL of the LinkedIn profile.",
-        verbose_name=_("LinkedIn URL"),
     )
 
     def __str__(self):
@@ -261,13 +261,13 @@ class XQRCode(QRCode):
     scanned, it directs the user to the Twitter profile page.
     """
 
+    verbose_name=_("Twitter URL"),
     url = models.URLField(
+        validators=[validate_x],
         help_text=_(
             "URL of the X profile. Example: 'https://www.twitter.com/username'"
         ),
-        validators=[validate_x],
         db_comment="The URL of the Twitter profile.",
-        verbose_name=_("Twitter URL"),
     )
 
     def __str__(self):
@@ -292,9 +292,9 @@ class MediaUrl(QRCode):
     """
 
     url = models.URLField(
+        verbose_name=_("Media URL"),
         help_text=_("URL of the media content."),
         db_comment="The URL of the media content.",
-        verbose_name=_("Media URL"),
     )
 
     def __str__(self):
diff --git a/sage_qrcode/models/wifi.py b/sage_qrcode/models/wifi.py
index d9fd015..8d81c1c 100644
--- a/sage_qrcode/models/wifi.py
+++ b/sage_qrcode/models/wifi.py
@@ -12,23 +12,23 @@ class WifiQRCode(QRCode):
     """
 
     ssid = models.CharField(
+        verbose_name=_("SSID"),
         max_length=255,
         help_text=_("SSID of the WiFi network."),
         db_comment="The SSID of the WiFi network.",
-        verbose_name=_("SSID"),
     )
     password = models.CharField(
+        verbose_name=_("WiFi Password"),
         max_length=255,
         help_text=_("Password of the WiFi network."),
         db_comment="The password for the WiFi network.",
-        verbose_name=_("WiFi Password"),
     )
     security = models.CharField(
+        verbose_name=_("Security Type"),
         max_length=50,
         default="WPA",
         help_text=_("Security type of the WiFi network."),
         db_comment="The security type for the WiFi network (e.g., WPA, WPA2).",
-        verbose_name=_("Security Type"),
     )
 
     def __str__(self):
diff --git a/sage_qrcode/tests/service/test_barcode.py b/sage_qrcode/tests/service/test_barcode.py
index 21eb7ec..b9f38bf 100644
--- a/sage_qrcode/tests/service/test_barcode.py
+++ b/sage_qrcode/tests/service/test_barcode.py
@@ -1,8 +1,9 @@
-from unittest.mock import patch, MagicMock
-from PIL import Image
 from io import BytesIO
+from unittest.mock import MagicMock, patch
+
 import pytest
 from django.core.exceptions import ValidationError
+from PIL import Image
 
 
 class TestBarcodeProxy:
@@ -55,23 +56,22 @@ def test_generate_barcode_text(
 
     @patch("pyshorteners.Shortener")
     def test_shorten_url(self, mock_shortener, barcode_proxy, sample_url):
-        mock_tinyurl = mock_shortener.return_value.tinyurl
-        mock_tinyurl.short.return_value = "https://tinyurl.com/shortened-url"
+        mock_tiny_url = mock_shortener.return_value.tinyurl
+        mock_tiny_url.short.return_value = "https://tinyurl.com/shortened-url"
 
         shortened_url = barcode_proxy.shorten_url(sample_url)
 
         assert shortened_url == "https://tinyurl.com/shortened-url"
-        mock_tinyurl.short.assert_called_once_with(sample_url)
+        mock_tiny_url.short.assert_called_once_with(sample_url)
 
     @patch("sage_qrcode.service.barcode.get_barcode_class")
-    def test_save_barcode(
-        self, mock_get_barcode_class, barcode_proxy, sample_text, tmp_path
+    def test_save_barcode_no_disk_write(
+        self, mock_get_barcode_class, barcode_proxy, sample_text
     ):
         mock_barcode_instance = MagicMock()
         mock_get_barcode_class.return_value = MagicMock(
             return_value=mock_barcode_instance
         )
-
         buffer = BytesIO()
         image = Image.new("RGB", (100, 50), color="white")
         image.save(buffer, format="PNG")
@@ -81,12 +81,11 @@ def test_save_barcode(
         )
 
         barcode_proxy.generate_barcode(data=sample_text)
-        barcode_proxy.save_barcode()
-
-        barcode_image_path = tmp_path / "test_barcode.png"
-        barcode_proxy.barcode_image.save(barcode_image_path)
 
-        assert barcode_image_path.exists()
+        # No file system write; we're only checking the in-memory image
+        barcode_image = barcode_proxy.barcode_image
+        assert barcode_image is not None
+        mock_get_barcode_class.assert_called_once()
 
     @patch("sage_qrcode.service.barcode.get_barcode_class")
     def test_generate_barcode_custom_colors(
@@ -113,11 +112,9 @@ def test_generate_barcode_custom_colors(
         assert barcode_proxy.barcode_image is not None
         mock_get_barcode_class.assert_called_once()
 
-        # Additional checks to verify that colors are correctly applied can be done by inspecting the image object
-
     @patch("sage_qrcode.service.barcode.get_barcode_class")
-    def test_save_barcode_different_formats(
-        self, mock_get_barcode_class, barcode_proxy, sample_text, tmp_path
+    def test_save_barcode_different_formats_no_disk_write(
+        self, mock_get_barcode_class, barcode_proxy, sample_text
     ):
         mock_barcode_instance = MagicMock()
         mock_get_barcode_class.return_value = MagicMock(
@@ -133,14 +130,16 @@ def test_save_barcode_different_formats(
         )
 
         barcode_proxy.generate_barcode(data=sample_text)
-        barcode_proxy.save_barcode()
 
-        # Test saving in PNG format
-        barcode_image_path_png = tmp_path / "test_barcode.png"
-        barcode_proxy.barcode_image.save(barcode_image_path_png, format="PNG")
-        assert barcode_image_path_png.exists()
+        barcode_image = barcode_proxy.barcode_image
+        assert barcode_image is not None
+
+        # Test saving in PNG format to buffer
+        buffer_png = BytesIO()
+        barcode_image.save(buffer_png, format="PNG")
+        assert buffer_png.getvalue() != b""
 
-        # Test saving in JPEG format
-        barcode_image_path_jpeg = tmp_path / "test_barcode.jpeg"
-        barcode_proxy.barcode_image.save(barcode_image_path_jpeg, format="JPEG")
-        assert barcode_image_path_jpeg.exists()
+        # Test saving in JPEG format to buffer
+        buffer_jpeg = BytesIO()
+        barcode_image.save(buffer_jpeg, format="JPEG")
+        assert buffer_jpeg.getvalue() != b""