diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c3746bb..87e853e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ on:
 
 jobs:
   build:
-    name: ${{ matrix.os }}, Python ${{ matrix.python-version }}
+    name: ${{ matrix.os }}, Python ${{ matrix.python-version }} ${{ matrix.install-args }} ${{ matrix.viscm-flavor }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -29,7 +29,7 @@ jobs:
         - '3.11'
         - '3.12'
         - '3.13'
-        test-args: [viscm>=0.10]
+        install-args: ['']
 
         include:
         - os: ubuntu-20.04
@@ -45,7 +45,7 @@ jobs:
           python-version: '3.13'
 
     concurrency:
-      group: ${{ github.ref }}-${{ matrix.os }}-${{ matrix.python-version }}-build
+      group: ${{ github.ref }}-${{ matrix.os }}-${{ matrix.python-version }}-${{ matrix.install-args }}-build
       cancel-in-progress: true
 
     steps:
@@ -56,21 +56,24 @@ jobs:
         cache-dependency-glob: pyproject.toml
 
     - name: Build
+      shell: bash # for windows-compat
       run: |
-        uv venv --python ${{ matrix.python-version }}
-        uv pip install . ${{ matrix.install-args }}
-        uv pip install -r requirements/dev.txt ${{ matrix.test-args }}
+        uv venv -p ${{ matrix.python-version }}
+        uv pip install ${{ matrix.install-args }} .
 
     - run: uv pip list
 
     - name: Test package (no coverage)
       if: ${{ !startsWith( matrix.os , 'ubuntu' ) }}
-      run: uv run ${{ matrix.install-args }} pytest --color=yes --mpl
+      shell: bash # for windows-compat
+      run: |
+        uv run --verbose --group dev ${{ matrix.install-args }} \
+          pytest --color=yes --mpl
 
     - name: Test package (with coverage)
       if: startsWith( matrix.os , 'ubuntu' )
       run: |
-        uv run ${{ matrix.install-args }} \
+        uv run --verbose --group dev ${{ matrix.install-args }} \
           coverage run --parallel-mode -m pytest --color=yes --mpl
 
     - name: Upload coverage data
@@ -79,7 +82,7 @@ jobs:
       if: startsWith( matrix.os , 'ubuntu' )
       uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
       with:
-        name: cmasher_coverage_data-${{ matrix.os }}-${{ matrix.python-version }}
+        name: cmasher_coverage_data-${{ matrix.os }}-${{ matrix.python-version }}-${{ matrix.install-args }}
         path: .coverage.*
         if-no-files-found: ignore
         include-hidden-files: true
@@ -119,6 +122,7 @@ jobs:
     name: type check w/ Python ${{ matrix.python-version }}
 
     strategy:
+      fail-fast: false
       matrix:
         python-version:
         - '3.10'
@@ -138,10 +142,7 @@ jobs:
         cache-dependency-glob: pyproject.toml
 
     - name: Run mypy
-      run: |
-        uvx --python ${{ matrix.python-version }} \
-          --with-requirements=requirements/typecheck.txt --with . \
-          mypy src/cmasher
+      run: uv run -p ${{ matrix.python-version }} --group dev mypy src/cmasher
 
   docs:
     name: Build docs
@@ -160,8 +161,8 @@ jobs:
 
     - name: Build
       run: |
-        uvx --python 3.12 --with-requirements=docs/requirements.txt --from sphinx \
-          sphinx-build -M html docs/source site -W
+        uvx -p 3.13 --with-requirements=docs/requirements.txt --compile-bytecode \
+          --from sphinx sphinx-build -M html docs/source site -W
     - name: Upload artifacts
       uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
       with:
diff --git a/MANIFEST.in b/MANIFEST.in
index 35fe7ad..5bacba5 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,7 +2,6 @@ include LICENSE
 include CITATION
 include README.rst
 include MANIFEST.in
-include requirements/*.txt
 include conftest.py
 recursive-include cmasher data/*
 recursive-exclude cmasher/colormaps *
diff --git a/pyproject.toml b/pyproject.toml
index d622f01..d777fd0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,13 +45,38 @@ Documentation = "https://cmasher.readthedocs.io"
 [project.scripts]
 cmr = "cmasher.cli_tools:main"
 
+[dependency-groups]
+test = [
+    "coverage[toml]>=7.6.4",
+    "pytest>=4.6.0",
+    "pytest-mpl>=0.13.0",
+]
+typecheck = [
+    "mypy>=1.7.1",
+]
+dev = [
+  {include-group = "test"},
+  {include-group = "typecheck"},
+]
+
 [tool.hatch.build]
 exclude = [
   "scripts",
 ]
 
+[tool.setuptools]
+package-dir = {cmasher = "cmasher"}
+include-package-data = true
+zip-safe = false
+platforms = [
+    "Windows",
+    "Mac OS-X",
+    "Linux",
+    "Unix",
+]
+
 [tool.pytest.ini_options]
-addopts = "-v"
+addopts = "-v -ra"
 filterwarnings = [
   "error",
   "ignore:FigureCanvasAgg is non-interactive:UserWarning",
diff --git a/requirements/dev.txt b/requirements/dev.txt
deleted file mode 100644
index bae8351..0000000
--- a/requirements/dev.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-coverage[toml]>=7.6.4
-pyqt5>=5.15.6
-pytest>=4.6.0
-pytest-mpl>=0.13.0
diff --git a/requirements/typecheck.txt b/requirements/typecheck.txt
deleted file mode 100644
index 0aef747..0000000
--- a/requirements/typecheck.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-mypy==1.7.1
-pytest==7.4.3
diff --git a/src/cmasher/utils.py b/src/cmasher/utils.py
index 53fe17c..7f9a7d6 100644
--- a/src/cmasher/utils.py
+++ b/src/cmasher/utils.py
@@ -1545,7 +1545,7 @@ def take_cmap_colors(
 
     # Convert colors to proper format
     if return_fmt in ("float", "norm", "int", "8bit"):
-        colors = np.apply_along_axis(to_rgb, 1, colors)  # type: ignore [arg-type]
+        colors = np.apply_along_axis(to_rgb, 1, colors)  # type: ignore [call-overload]
         if return_fmt in ("int", "8bit"):
             colors = np.array(np.rint(colors * 255), dtype=int)
         colors = list(map(tuple, colors))