diff --git a/.github/workflows/test-quick.yaml b/.github/workflows/test-quick.yaml
index c0d541f..f001c2b 100644
--- a/.github/workflows/test-quick.yaml
+++ b/.github/workflows/test-quick.yaml
@@ -21,8 +21,8 @@ jobs:
         os:
           - ubuntu
         python:
-          - "3.9"
-          - "3.14"
+          - '3.9'
+          - '3.14'
         backend:
           - base
 
@@ -37,8 +37,9 @@ jobs:
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0 from 2026-01-21.
         with:
-          python-version: ${{ matrix.python }}
           allow-prereleases: true
+          cache: 'pip'
+          python-version: ${{ matrix.python }}
 
       - name: Install tox
         run: python -m pip install tox
@@ -69,7 +70,8 @@ jobs:
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0 from 2026-01-21.
         with:
-          python-version: "3.13"
+          cache: 'pip'
+          python-version: '3.13'
 
       - name: Install tox
         run: python -m pip install tox
@@ -79,3 +81,34 @@ jobs:
 
       - uses: ironsh/iron-proxy-action/summary@67ae2cdb5cc549c5cb94e76235953f4a9fcb183c  # v0.1.3 from 2026-04-07.
         if: always()
+
+  pyright:
+    name: Pyright
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 from 2026-01-09.
+
+      - uses: ironsh/iron-proxy-action@67ae2cdb5cc549c5cb94e76235953f4a9fcb183c  # v0.1.3 from 2026-04-07.
+        with:
+          egress-rules: .github/egress-build-rules.yaml
+          warn: 'true'
+
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0 from 2026-01-21.
+        with:
+          cache: 'pip'
+          python-version: '3.14'
+
+      - run: |
+          python -m venv .venv
+          source .venv/bin/activate
+          pip install '.[hyperscan,optional,re2]'
+
+      - run: echo "$PWD/.venv/bin" >> $GITHUB_PATH
+
+      - uses: jakebailey/pyright-action@8ec14b5cfe41f26e5f41686a31eb6012758217ef  # v3.0.2 from 2026-02-15.
+        with:
+          version: latest
+
+      - uses: ironsh/iron-proxy-action/summary@67ae2cdb5cc549c5cb94e76235953f4a9fcb183c  # v0.1.3 from 2026-04-07.
+        if: always()
diff --git a/pyproject.in.toml b/pyproject.in.toml
index 9748b40..03f4ffd 100644
--- a/pyproject.in.toml
+++ b/pyproject.in.toml
@@ -73,3 +73,8 @@ include = [
 exclude = [
 	"doc/build/",
 ]
+
+[tool.pyright]
+# This is for CI.
+include = ["pathspec"]
+typeCheckingMode = "standard"
diff --git a/pyproject.toml b/pyproject.toml
index 321c133..f8b29cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,3 +74,8 @@ include = [
 exclude = [
 	"doc/build/",
 ]
+
+[tool.pyright]
+# This is for CI.
+include = ["pathspec"]
+typeCheckingMode = "standard"