diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index 2aab9607f3..bd26b06053 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip install --upgrade '.[test]'
+        python -m pip install --upgrade '.[all,test]'
 
     - name: List installed Python packages
       run: python -m pip list
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81324f2884..1f61c5fb95 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip install --upgrade .[test]
+        python -m pip install --upgrade ".[all,test]"
 
     - name: List installed Python packages
       run: python -m pip list
diff --git a/.github/workflows/dependencies-head.yml b/.github/workflows/dependencies-head.yml
index ab2e8e8de2..a213e2052c 100644
--- a/.github/workflows/dependencies-head.yml
+++ b/.github/workflows/dependencies-head.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade --pre .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade --pre ".[all,test]"
         python -m pip list
 
     - name: List release candidates, alpha, and beta releases
@@ -62,7 +62,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade ".[all,test]"
         python -m pip uninstall --yes scipy
         python -m pip install --upgrade --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple scipy
         python -m pip list
@@ -88,7 +88,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade ".[all,test]"
         python -m pip uninstall --yes iminuit
         python -m pip install --upgrade cython
         python -m pip install --upgrade git+https://github.com/scikit-hep/iminuit.git
@@ -114,7 +114,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade ".[all,test]"
         python -m pip uninstall --yes uproot
         python -m pip install --upgrade git+https://github.com/scikit-hep/uproot5.git
         python -m pip list
@@ -141,7 +141,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade ".[all,test]"
         python -m pip uninstall --yes matplotlib
         # Need to use --extra-index-url as dependencies aren't on scientific-python-nightly-wheels package index.
         # Need to use --pre as dev releases will need priority over stable releases.
@@ -176,7 +176,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir --quiet install --upgrade .[test]
+        python -m pip --no-cache-dir --quiet install --upgrade ".[all,test]"
         python -m pip uninstall --yes pytest
         python -m pip install --upgrade git+https://github.com/pytest-dev/pytest.git
         python -m pip list
diff --git a/.github/workflows/lower-bound-requirements.yml b/.github/workflows/lower-bound-requirements.yml
index 27e9a9cf4c..69f0937e8f 100644
--- a/.github/workflows/lower-bound-requirements.yml
+++ b/.github/workflows/lower-bound-requirements.yml
@@ -27,7 +27,7 @@ jobs:
     - name: Install dependencies and force lowest bound
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        python -m pip --no-cache-dir install --constraint tests/constraints.txt .[test]
+        python -m pip --no-cache-dir install --constraint tests/constraints.txt ".[all,test]"
 
     - name: List installed Python packages
       run: python -m pip list
diff --git a/.github/workflows/notebooks.yml b/.github/workflows/notebooks.yml
index 47c6acaff0..bc4c817efe 100644
--- a/.github/workflows/notebooks.yml
+++ b/.github/workflows/notebooks.yml
@@ -30,7 +30,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip setuptools wheel
         # FIXME: c.f. https://github.com/scikit-hep/pyhf/issues/2104
-        python -m pip install --upgrade .[test] 'jupyter-client<8.0.0'
+        python -m pip install --upgrade ".[all,test]" 'jupyter-client<8.0.0'
 
     - name: List installed Python packages
       run: python -m pip list
diff --git a/noxfile.py b/noxfile.py
index ba75fae440..8104dbd28b 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -35,7 +35,7 @@ def tests(session):
         $ nox --session tests --python 3.11 -- tests/test_tensor.py  # run specific tests
         $ nox --session tests --python 3.11 -- coverage  # run with coverage but slower
     """
-    session.install("--upgrade", "--editable", ".[test]")
+    session.install("--upgrade", "--editable", ".[all,test]")
     session.install("--upgrade", "pytest")
 
     # Allow tests to be run with coverage
@@ -107,7 +107,7 @@ def regenerate(session):
     """
     Regenerate Matplotlib images.
     """
-    session.install("--upgrade", "--editable", ".[test]")
+    session.install("--upgrade", "--editable", ".[all,test]")
     session.install("--upgrade", "pytest", "matplotlib")
     if not sys.platform.startswith("linux"):
         session.error(
@@ -182,7 +182,7 @@ def notebooks(session: nox.Session):
     """
     Run the notebook tests.
     """
-    session.install("--upgrade", "--editable", ".[test]")
+    session.install("--upgrade", "--editable", ".[all,test]")
     session.run(
         "pytest",
         "--override-ini",