diff --git a/.coveragerc b/.coveragerc
index e953c6c86c..1a9e67e9a6 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -4,6 +4,7 @@ omit =
     # Do not run coverage on migration files
     */migrations/*
     InvenTree/manage.py
+    InvenTree/keygen.py
     Inventree/InvenTree/middleware.py
     Inventree/InvenTree/utils.py
     Inventree/InvenTree/wsgi.py
\ No newline at end of file
diff --git a/InvenTree/InvenTree/helpers.py b/InvenTree/InvenTree/helpers.py
index 02f8159c6e..fe2fbe5046 100644
--- a/InvenTree/InvenTree/helpers.py
+++ b/InvenTree/InvenTree/helpers.py
@@ -30,67 +30,8 @@ def TestIfImageURL(url):
         '.jpg', '.jpeg',
         '.png', '.bmp',
         '.tif', '.tiff',
-        '.webp',
+        '.webp', '.gif',
     ]
-
-
-def DownloadExternalFile(url, **kwargs):
-    """ Attempt to download an external file
-
-    Args:
-        url - External URL
-    
-    """
-
-    result = {
-        'status': False,
-        'url': url,
-        'file': None,
-        'status_code': 200,
-    }
-
-    headers = {'User-Agent': 'Mozilla/5.0'}
-    max_size = kwargs.get('max_size', 1048576)  # 1MB default limit
-
-    # Get the HEAD for the file
-    try:
-        head = requests.head(url, stream=True, headers=headers)
-    except:
-        result['error'] = 'Error retrieving HEAD data'
-        return result
-
-    if not head.status_code == 200:
-        result['error'] = 'Incorrect HEAD status code'
-        result['status_code'] = head.status_code
-        return result
-
-    try:
-        filesize = int(head.headers['Content-Length'])
-    except ValueError:
-        result['error'] = 'Could not decode filesize'
-        result['extra'] = head.headers['Content-Length']
-        return result
-
-    if filesize > max_size:
-        result['error'] = 'File size too large ({s})'.format(s=filesize)
-        return result
-
-    # All checks have passed - download the file
-
-    try:
-        request = requests.get(url, stream=True, headers=headers)
-    except:
-        result['error'] = 'Error retriving GET data'
-        return result
-
-    try:
-        dl_file = io.StringIO(request.text)
-        result['status'] = True
-        result['file'] = dl_file
-        return result
-    except:
-        result['error'] = 'Could not convert downloaded data to file'
-        return result
         
 
 def str2bool(text, test=True):
diff --git a/InvenTree/InvenTree/tests.py b/InvenTree/InvenTree/tests.py
index 1631d7bd96..fad8f888a3 100644
--- a/InvenTree/InvenTree/tests.py
+++ b/InvenTree/InvenTree/tests.py
@@ -2,6 +2,8 @@ from django.test import TestCase
 import django.core.exceptions as django_exceptions
 
 from .validators import validate_overage, validate_part_name
+from . import helpers
+
 
 class ValidatorTest(TestCase):
 
@@ -36,3 +38,66 @@ class ValidatorTest(TestCase):
 
         with self.assertRaises(django_exceptions.ValidationError):
             validate_overage("aaaa")
+
+
+class TestHelpers(TestCase):
+    """ Tests for InvenTree helper functions """
+
+    def test_image_url(self):
+        """ Test if a filename looks like an image """
+
+        for name in ['ape.png', 'bat.GiF', 'apple.WeBP', 'BiTMap.Bmp']:
+            self.assertTrue(helpers.TestIfImageURL(name))
+
+        for name in ['no.doc', 'nah.pdf', 'whatpng']:
+            self.assertFalse(helpers.TestIfImageURL(name))
+
+    def test_str2bool(self):
+        """ Test string to boolean conversion """
+
+        for s in ['yes', 'Y', 'ok', '1', 'OK', 'Ok', 'tRuE', 'oN']:
+            self.assertTrue(helpers.str2bool(s))
+            self.assertFalse(helpers.str2bool(s, test=False))
+
+        for s in ['nO', '0', 'none', 'noNE', None, False, 'falSe', 'off']:
+            self.assertFalse(helpers.str2bool(s))
+            self.assertTrue(helpers.str2bool(s, test=False))
+
+        for s in ['wombat', '', 'xxxx']:
+            self.assertFalse(helpers.str2bool(s))
+            self.assertFalse(helpers.str2bool(s, test=False))
+
+
+class TestQuoteWrap(TestCase):
+    """ Tests for string wrapping """
+
+    def test_single(self):
+
+        self.assertEqual(helpers.WrapWithQuotes('hello'), '"hello"')
+        self.assertEqual(helpers.WrapWithQuotes('hello"'), '"hello"')
+
+
+class TestMakeBarcoede(TestCase):
+    """ Tests for barcode string creation """
+
+    def test_barcode(self):
+
+        data = {
+            'animal': 'cat',
+            'legs': 3,
+            'noise': 'purr'
+        }
+
+        bc = helpers.MakeBarcode("part", 3, "www.google.com", data)
+
+        self.assertIn('animal', bc)
+        self.assertIn('tool', bc)
+        self.assertIn('"tool": "InvenTree"', bc)
+
+
+class TestDownloadFile(TestCase):
+
+
+    def test_download(self):
+        helpers.DownloadFile("hello world", "out.txt")
+        helpers.DownloadFile(bytes("hello world".encode("utf8")), "out.bin")