diff --git a/.github/workflows/nightly_at_main.yml b/.github/workflows/nightly_at_main.yml
deleted file mode 100644
index c2b9d33..0000000
--- a/.github/workflows/nightly_at_main.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-name: Nightly test at main branch
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: '30 1 * * 1-5'
-
-jobs:
-  setup:
-    name: Setup variables
-    runs-on: 'ubuntu-22.04'
-    outputs:
-      min_python: ${{ steps.vars.outputs.min_python }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Get Python version for other CI jobs
-        id: vars
-        run: echo "min_python=$(cat .github/workflows/python-version-ci)" >> $GITHUB_OUTPUT
-
-  tests:
-    name: Tests
-    needs: setup
-    strategy:
-      matrix:
-        os: ['ubuntu-22.04']
-        python:
-          - version: '${{needs.setup.outputs.min_python}}'
-            tox-env: 'nightly'
-    uses: ./.github/workflows/test.yml
-    with:
-      os-variant: ${{ matrix.os }}
-      python-version: ${{ matrix.python.version }}
-      tox-env: ${{ matrix.python.tox-env }}
-    secrets: inherit
diff --git a/.github/workflows/nightly_at_release.yml b/.github/workflows/nightly_at_release.yml
deleted file mode 100644
index 3faa1c2..0000000
--- a/.github/workflows/nightly_at_release.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-name: Nightly tests at latest release
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: '0 1 * * 1-5'
-
-jobs:
-  setup:
-    name: Setup variables
-    runs-on: 'ubuntu-22.04'
-    outputs:
-      min_python: ${{ steps.vars.outputs.min_python }}
-      release_tag: ${{ steps.release.outputs.release_tag }}
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0  # history required so we can determine latest release tag
-      - name: Get last release tag from git
-        id: release
-        run: echo "release_tag=$(git describe --tags --abbrev=0 --match '[0-9]*.[0-9]*.[0-9]*')" >> $GITHUB_OUTPUT
-      - name: Get Python version for other CI jobs
-        id: vars
-        run: echo "min_python=$(cat .github/workflows/python-version-ci)" >> $GITHUB_OUTPUT
-
-  tests:
-    name: Tests
-    needs: setup
-    strategy:
-      matrix:
-        os: ['ubuntu-22.04']
-        python:
-          - version: '${{needs.setup.outputs.min_python}}'
-            tox-env: 'nightly'
-    uses: ./.github/workflows/test.yml
-    with:
-      os-variant: ${{ matrix.os }}
-      python-version: ${{ matrix.python.version }}
-      tox-env: ${{ matrix.python.tox-env }}
-      checkout_ref: ${{ needs.setup.outputs.release_tag }}
-    secrets: inherit
diff --git a/.github/workflows/unpinned.yml b/.github/workflows/unpinned.yml
deleted file mode 100644
index 3f49f72..0000000
--- a/.github/workflows/unpinned.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-name: Unpinned tests at latest release
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: '0 2 * * 1'
-
-jobs:
-  setup:
-    name: Setup variables
-    runs-on: 'ubuntu-22.04'
-    outputs:
-      min_python: ${{ steps.vars.outputs.min_python }}
-      release_tag: ${{ steps.release.outputs.release_tag }}
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0  # history required so we can determine latest release tag
-      - name: Get last release tag from git
-        id: release
-        run: echo "release_tag=$(git describe --tags --abbrev=0 --match '[0-9]*.[0-9]*.[0-9]*')" >> $GITHUB_OUTPUT
-      - name: Get Python version for other CI jobs
-        id: vars
-        run: echo "min_python=$(cat .github/workflows/python-version-ci)" >> $GITHUB_OUTPUT
-
-  tests:
-    name: Tests
-    needs: setup
-    strategy:
-      matrix:
-        os: ['ubuntu-22.04']
-        python:
-          - version: '${{needs.setup.outputs.min_python}}'
-            tox-env: 'unpinned'
-    uses: ./.github/workflows/test.yml
-    with:
-      os-variant: ${{ matrix.os }}
-      python-version: ${{ matrix.python.version }}
-      tox-env: ${{ matrix.python.tox-env }}
-      checkout_ref: ${{ needs.setup.outputs.release_tag }}
-    secrets: inherit