diff --git a/netbox/netbox/tests/test_convert_byte_size.py b/netbox/netbox/tests/test_convert_byte_size.py
new file mode 100644
index 000000000..f5d8b4a55
--- /dev/null
+++ b/netbox/netbox/tests/test_convert_byte_size.py
@@ -0,0 +1,25 @@
+from netbox.utils import convert_byte_size
+from utilities.testing import TestCase
+
+
+class TestConvertByteSize(TestCase):
+    def test_convert_byte_size_returns_original_value_for_small_numbers(self):
+        self.assertEqual(convert_byte_size(500, "kilo"), 500)
+
+    def test_convert_byte_size_converts_kilobytes_to_bytes(self):
+        self.assertEqual(convert_byte_size(1024, "kilo"), 1024)
+
+    def test_convert_byte_size_converts_megabytes_to_bytes(self):
+        self.assertEqual(convert_byte_size(1048576, "mega"), 1)
+
+    def test_convert_byte_size_converts_gigabytes_to_bytes(self):
+        self.assertEqual(convert_byte_size(1073741824, "giga"), 1)
+
+    def test_convert_byte_size_converts_terabytes_to_bytes(self):
+        self.assertEqual(convert_byte_size(1099511627776, "tera"), 1)
+
+    def test_convert_byte_size_returns_zero_for_none(self):
+        self.assertEqual(convert_byte_size(None, "mega"), 0)
+
+    def test_convert_byte_size_without_unit(self):
+        self.assertEqual(round(convert_byte_size(123456789), 2), 117.74)