diff --git a/pyproject.toml b/pyproject.toml
index e6de53a..24c0ea2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,6 +57,7 @@ package-dir = { '' = '.' } # without this line, C++ source files get included in
 [tool.cibuildwheel]
 build = "cp{37,38,39,31*}-*"
 skip = ["*cp37-musllinux*", "*musllinux_aarch64*", "cp{38,39,31*}-macosx_x86_64"]
+build-frontend = "build"
 test-command = 'python -m unittest discover "{project}/tests/" --verbose'
 test-extras = ["tests"]
 manylinux-x86_64-image = "manylinux2014"
diff --git a/tests/__init__.py b/tests/__init__.py
index c0dacea..ddd67bd 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,4 +1,3 @@
 import os.path
-import unittest
 
 images_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'images')
diff --git a/tests/test_bc1.py b/tests/test_bc1.py
index 97063c9..c886a6d 100644
--- a/tests/test_bc1.py
+++ b/tests/test_bc1.py
@@ -1,9 +1,7 @@
 import unittest
-import os.path
 from parameterized import parameterized, parameterized_class
-import quicktex
 from quicktex.s3tc.bc1 import BC1Block, BC1Texture, BC1Encoder, BC1Decoder
-from tests.images import BC1Blocks, image_path
+from .images import BC1Blocks
 from PIL import Image, ImageChops
 
 in_endpoints = ((253, 254, 255), (65, 70, 67))  # has some small changes that should encode the same
diff --git a/tests/test_bc4.py b/tests/test_bc4.py
index 5436886..207dee1 100644
--- a/tests/test_bc4.py
+++ b/tests/test_bc4.py
@@ -1,7 +1,7 @@
 import unittest
 from parameterized import parameterized, parameterized_class
 from quicktex.s3tc.bc4 import BC4Block, BC4Texture, BC4Encoder, BC4Decoder
-from tests.images import BC4Blocks
+from .images import BC4Blocks
 from PIL import Image, ImageChops
 
 
diff --git a/tests/test_texture.py b/tests/test_texture.py
index 5d3323f..df4750e 100644
--- a/tests/test_texture.py
+++ b/tests/test_texture.py
@@ -1,6 +1,6 @@
 import unittest
 import os.path
-from tests.images import image_path
+from .images import image_path
 from quicktex import RawTexture
 from PIL import Image