diff --git a/Pipfile b/Pipfile
index 9f4876d..c30d866 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,6 +21,7 @@ setuptools = "*"
 vistir = "==0.6.1"
 pipenv-setup = {extras = ["black"], version = "*"}
 black = "*"
+pytest = "*"
 
 [requires]
 python_version = "3.11"
diff --git a/Pipfile.lock b/Pipfile.lock
index ae7ee34..3a76c47 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "e489f1d322f8c3fae1ef168460a4b8e7d433af359a03d9cff2bc7eec46e09d39"
+            "sha256": "fb76cf9103131a075b19295af3f7203d705c624168b94378828bbfef97fc5ead"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -770,6 +770,14 @@
             "markers": "python_version >= '3.5'",
             "version": "==3.4"
         },
+        "iniconfig": {
+            "hashes": [
+                "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3",
+                "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.0.0"
+        },
         "mypy-extensions": {
             "hashes": [
                 "sha256:4392f6c0eb8a5668a69e23d168ffa70f0be9ccfd32b5cc2d26a34ae5b844552d",
@@ -861,6 +869,14 @@
             "markers": "python_version >= '3.7'",
             "version": "==0.4.4"
         },
+        "pluggy": {
+            "hashes": [
+                "sha256:4224373bacce55f955a878bf9cfa763c1e360858e330072059e10bad68531159",
+                "sha256:74134bbf457f031a36d68416e1509f34bd5ccc019f0bcc952c7b909d06b37bd3"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==1.0.0"
+        },
         "pyparsing": {
             "hashes": [
                 "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb",
@@ -869,6 +885,14 @@
             "markers": "python_version >= '3.1'",
             "version": "==3.0.9"
         },
+        "pytest": {
+            "hashes": [
+                "sha256:3799fa815351fea3a5e96ac7e503a96fa51cc9942c3753cda7651b93c1cfa362",
+                "sha256:434afafd78b1d78ed0addf160ad2b77a30d35d4bdf8af234fe621919d9ed15e3"
+            ],
+            "index": "pypi",
+            "version": "==7.3.1"
+        },
         "python-dateutil": {
             "hashes": [
                 "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
diff --git a/setup.py b/setup.py
index 8177288..425b31e 100644
--- a/setup.py
+++ b/setup.py
@@ -85,7 +85,7 @@ setup(
     extras_require={
         "dev": [
             "attrs==23.1.0; python_version >= '3.7'",
-            "black==22.12.0; python_version >= '3.6'",
+            "black==22.12.0",
             "cached-property==1.5.2",
             "cerberus==1.3.4",
             "certifi==2023.5.7; python_version >= '3.6'",
@@ -95,6 +95,7 @@ setup(
             "colorama==0.4.6; platform_system == 'Windows'",
             "distlib==0.3.6",
             "idna==3.4; python_version >= '3.5'",
+            "iniconfig==2.0.0; python_version >= '3.7'",
             "mypy-extensions==1.0.0; python_version >= '3.5'",
             "orderedmultidict==1.0.1",
             "packaging==20.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
@@ -106,7 +107,9 @@ setup(
             "pipfile==0.0.2",
             "platformdirs==3.5.1; python_version >= '3.7'",
             "plette[validation]==0.4.4; python_version >= '3.7'",
+            "pluggy==1.0.0; python_version >= '3.6'",
             "pyparsing==3.0.9; python_version >= '3.1'",
+            "pytest==7.3.1",
             "python-dateutil==2.8.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "requests==2.30.0; python_version >= '3.7'",
             "requirementslib==1.6.9; python_version >= '3.7'",
diff --git a/tests/test_byte_conversion.py b/tests/test_byte_conversion.py
new file mode 100644
index 0000000..35e54b3
--- /dev/null
+++ b/tests/test_byte_conversion.py
@@ -0,0 +1,12 @@
+from phototag.helpers import convert_to_bytes
+
+
+def test_basic():
+    assert convert_to_bytes("1 Kb") == 128
+    assert convert_to_bytes("1Mb") == 1024 ** 2 / 8
+    assert convert_to_bytes("1 KB") == 1024
+    assert convert_to_bytes("1 MB") == 1024 ** 2
+    assert convert_to_bytes("1 KiB") == 1024
+    assert convert_to_bytes("1TiB") == 1024 ** 4
+    assert convert_to_bytes("1Tib") == 1024 ** 4 / 8
+    assert convert_to_bytes("1tib") == 1000 ** 4 / 8