diff --git a/.github/workflows/ndtiff_tests.yml b/.github/workflows/ndtiff_tests.yml
index 7b5fcce..697d6e8 100644
--- a/.github/workflows/ndtiff_tests.yml
+++ b/.github/workflows/ndtiff_tests.yml
@@ -36,7 +36,6 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install ./python/[test]
-          pip install -r python/requirements.txt
 
       - name: Tests
         run: |
diff --git a/python/ndstorage/_version.py b/python/ndstorage/_version.py
index 46d6525..373affa 100644
--- a/python/ndstorage/_version.py
+++ b/python/ndstorage/_version.py
@@ -1,2 +1,2 @@
-version_info = (0, 1, 17)
+version_info = (0, 1, 18)
 __version__ = ".".join(map(str, version_info))
diff --git a/python/ndstorage/test/writing_test.py b/python/ndstorage/test/writing_test.py
index 5b1ed8b..39c4c3a 100644
--- a/python/ndstorage/test/writing_test.py
+++ b/python/ndstorage/test/writing_test.py
@@ -1,9 +1,9 @@
 import numpy as np
 import os
 import shutil
-from .ndtiff_file import SingleNDTiffWriter, SingleNDTiffReader
-from .ndtiff_dataset import NDTiffDataset
-from .ndram_dataset import NDRAMDataset
+from ..ndtiff_file import SingleNDTiffWriter, SingleNDTiffReader
+from ..ndtiff_dataset import NDTiffDataset
+from ..ndram_dataset import NDRAMDataset
 import pytest
 
 @pytest.fixture(scope="function")
diff --git a/python/pyproject.toml b/python/pyproject.toml
index 94f1f78..0dc4c9c 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -21,6 +21,13 @@ dynamic = ["version"]
 description = "N-dimensional, multiresolution file format for Micro-Manager"
 readme = "README.md"
 
+
+[project.optional-dependencies]
+test = [
+    "pytest",
+]
+
+
 [tool.pytest.ini_options]
 testpaths = [
     "python/ndstorage/test",