diff --git a/.github/workflows/requirements.txt b/.github/workflows/requirements.txt
index 915b278..4b0ef84 100644
--- a/.github/workflows/requirements.txt
+++ b/.github/workflows/requirements.txt
@@ -1,4 +1,2 @@
 cython ~=3.0
-wheel
-auditwheel <5.2
-setuptools >=46.4.0
+scikit-build-core
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 19fbcd9..47e9734 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -65,7 +65,7 @@ jobs:
     - name: Install Python requirements
       run: python -m pip install -r .github/workflows/requirements.txt
     - name: Install test requirements
-      run: python -m pip install -r pyrodigal/tests/requirements.txt
+      run: python -m pip install -r src/pyrodigal/tests/requirements.txt
     - name: Build C extension in debug mode
       run: python setup.py build_ext --inplace --debug
     - name: Test without coverage
@@ -128,7 +128,7 @@ jobs:
     - name: Install Python requirements
       run: python -m pip install -r .github/workflows/requirements.txt
     - name: Install test requirements
-      run: python -m pip install -r pyrodigal/tests/requirements.txt
+      run: python -m pip install -r src/pyrodigal/tests/requirements.txt
     - name: Build C extension in debug mode
       run: python setup.py build_ext --inplace --debug --plat-name macos-x86_64
     - name: Test without coverage
@@ -191,7 +191,7 @@ jobs:
     - name: Install Python requirements
       run: python -m pip install -r .github/workflows/requirements.txt
     - name: Install test requirements
-      run: python -m pip install -r pyrodigal/tests/requirements.txt
+      run: python -m pip install -r src/pyrodigal/tests/requirements.txt
     - name: Build C extension
       run: python setup.py build_ext --inplace
     - name: Test without coverage
@@ -224,7 +224,7 @@ jobs:
     - name: Install Python requirements
       run: python -m pip install -r .github/workflows/requirements.txt
     - name: Install test requirements
-      run: python -m pip install -r pyrodigal/tests/requirements.txt
+      run: python -m pip install -r src/pyrodigal/tests/requirements.txt
     - name: Install coverage package
       run: python -m pip install -U coverage
     - name: Build Prodigal with optimizations
diff --git a/pyproject.toml b/pyproject.toml
index 6cc13ca..4c707e7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ dependencies = [
 "PyPI" = "https://pypi.org/project/pyrodigal"
 
 [project.optional-dependencies]
-test = ["importlib-resources ; python_version < '3.7'"]
+test = ["importlib-resources ; python_version < '3.9'"]
 isal = ["isal ~=1.1"]
 lz4 = ["lz4 ~=4.0"]
 zst = ["zstandard ~=0.22"]