diff --git a/.github/workflows/tests.yml b/.github/workflows/ci-build.yml
similarity index 79%
rename from .github/workflows/tests.yml
rename to .github/workflows/ci-build.yml
index ac34e26fd..7e9e4e28d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/ci-build.yml
@@ -1,5 +1,4 @@
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-name: Test
+name: Python CI
 
 on:
   push:
@@ -10,27 +9,44 @@ on:
     - cron: "0 0 * * *"
   workflow_dispatch:
 
+env:
+  LATEST_SUPPORTED_PY: "3.14"
+
 jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        with:
+          persist-credentials: false
+      - name: Set up Python ${{ env.LATEST_SUPPORTED_PY }}
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        with:
+          python-version: ${{ env.LATEST_SUPPORTED_PY }}
+      - name: Run lint verification
+        run: ./scripts/lint.sh
+
   typecheck:
-    name: Typechecks
+    name: Typecheck
     runs-on: ubuntu-latest
     timeout-minutes: 5
-    strategy:
-      matrix:
-        python-version: ["3.14"]
     permissions:
       contents: read
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           persist-credentials: false
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python ${{ env.LATEST_SUPPORTED_PY }}
         uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ env.LATEST_SUPPORTED_PY }}
       - name: Run mypy verification
-        run: |
-          ./scripts/run_mypy.sh
+        run: ./scripts/run_mypy.sh
+
   unittest:
     name: Unit tests
     runs-on: ubuntu-22.04
@@ -48,6 +64,7 @@ jobs:
           - "3.8"
           - "3.7"
           - "pypy3.10"
+          - "pypy3.11"
     permissions:
       contents: read
     env:
@@ -67,10 +84,8 @@ jobs:
           pip install -U pip
           pip install -r requirements/testing.txt
           pip install -r requirements/optional.txt
-      - name: Run validation (black/flake8/pytest)
+      - name: Run tests
         run: |
-          black --check slack/ slack_sdk/ tests/ integration_tests/
-          flake8 slack/ slack_sdk/
           PYTHONPATH=$PWD:$PYTHONPATH pytest --cov-report=xml --cov=slack_sdk/ --junitxml=reports/test_report.xml tests/
       - name: Run tests for SQLAlchemy v1.4 (backward-compatibility)
         run: |
@@ -89,7 +104,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true
       - name: Upload test coverage to Codecov (only with latest supported version)
-        if: startsWith(matrix.python-version, '3.14')
+        if: startsWith(matrix.python-version, env.LATEST_SUPPORTED_PY)
         uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
         with:
           fail_ci_if_error: true
@@ -98,10 +113,12 @@ jobs:
           report_type: coverage
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true
+
   notifications:
     name: Regression notifications
     runs-on: ubuntu-latest
     needs:
+      - lint
       - typecheck
       - unittest
     if: ${{ !success() && github.ref == 'refs/heads/main' && github.event_name != 'workflow_dispatch' }}
diff --git a/requirements/testing.txt b/requirements/testing.txt
index 9b702718c..9e1a3fd67 100644
--- a/requirements/testing.txt
+++ b/requirements/testing.txt
@@ -12,4 +12,3 @@ moto>=4.0.13,<6
 # For AsyncSQLAlchemy tests
 greenlet<=4
 aiosqlite<=1
--r tools.txt
diff --git a/requirements/tools.txt b/requirements/tools.txt
index dd09cd46f..4c0751dbd 100644
--- a/requirements/tools.txt
+++ b/requirements/tools.txt
@@ -1,6 +1,4 @@
-# We only need to install mypy with CPython runtimes
-# Typechecking using the PyPy runtime is not planned
-mypy<=1.19.0; platform_python_implementation == "CPython"
+mypy<=1.19.0;
 # while flake8 5.x have issues with Python 3.12, flake8 6.x requires Python >= 3.8.1,
 # so 5.x should be kept in order to stay compatible with Python 3.7/3.8
 flake8>=5.0.4,<8
diff --git a/scripts/format.sh b/scripts/format.sh
index d4236258f..56ca68077 100755
--- a/scripts/format.sh
+++ b/scripts/format.sh
@@ -4,7 +4,10 @@
 script_dir=`dirname $0`
 cd ${script_dir}/..
 
-pip install -U pip
-pip install -U -r requirements/tools.txt
+if [[ "$1" != "--no-install" ]]; then
+    export PIP_REQUIRE_VIRTUALENV=1
+    pip install -U pip
+    pip install -U -r requirements/tools.txt
+fi
 
 black slack/ slack_sdk/ tests/ integration_tests/
diff --git a/scripts/lint.sh b/scripts/lint.sh
new file mode 100755
index 000000000..8fac67888
--- /dev/null
+++ b/scripts/lint.sh
@@ -0,0 +1,14 @@
+
+#!/bin/bash
+# ./scripts/lint.sh
+
+script_dir=`dirname $0`
+cd ${script_dir}/..
+
+if [[ "$1" != "--no-install" ]]; then
+    pip install -U pip
+    pip install -U -r requirements/tools.txt
+fi
+
+black --check slack/ slack_sdk/ tests/ integration_tests/
+flake8 slack/ slack_sdk/
diff --git a/scripts/run_integration_tests.sh b/scripts/run_integration_tests.sh
index a5d86801b..1a6f254cb 100755
--- a/scripts/run_integration_tests.sh
+++ b/scripts/run_integration_tests.sh
@@ -10,10 +10,11 @@ cd ${script_dir}/..
 
 pip install -U pip
 pip install -U -r requirements/testing.txt \
-  -U -r requirements/optional.txt
+  -U -r requirements/optional.txt \
+  -U -r requirements/tools.txt
 
 echo "Generating code ..." && python scripts/codegen.py --path .
-echo "Running black (code formatter) ..." && black slack_sdk/
+echo "Running black (code formatter) ..." && ./scripts/format.sh --no-install
 
 test_target="${1:-tests/integration_tests/}"
 PYTHONPATH=$PWD:$PYTHONPATH pytest $test_target
diff --git a/scripts/run_mypy.sh b/scripts/run_mypy.sh
index 0d27346bc..cc1146f15 100755
--- a/scripts/run_mypy.sh
+++ b/scripts/run_mypy.sh
@@ -8,6 +8,7 @@ cd ${script_dir}/..
 
 pip install -U pip setuptools wheel
 pip install -U -r requirements/testing.txt \
-  -U -r requirements/optional.txt
+  -U -r requirements/optional.txt \
+  -U -r requirements/tools.txt
 
 mypy --config-file pyproject.toml
diff --git a/scripts/run_unit_tests.sh b/scripts/run_unit_tests.sh
index cec153388..c8ab0af78 100755
--- a/scripts/run_unit_tests.sh
+++ b/scripts/run_unit_tests.sh
@@ -10,10 +10,12 @@ cd ${script_dir}/..
 
 pip install -U pip
 pip install -U -r requirements/testing.txt \
-  -U -r requirements/optional.txt
+  -U -r requirements/optional.txt \
+  -U -r requirements/tools.txt
 
 echo "Generating code ..." && python scripts/codegen.py --path .
-echo "Running black (code formatter) ..." && black slack_sdk/
+echo "Running black (code formatter) ..." && ./scripts/format.sh --no-install
 
+echo "Running tests ..."
 test_target="${1:-tests/}"
 PYTHONPATH=$PWD:$PYTHONPATH pytest $test_target
diff --git a/scripts/run_validation.sh b/scripts/run_validation.sh
index 8a61d03a6..366f0d321 100755
--- a/scripts/run_validation.sh
+++ b/scripts/run_validation.sh
@@ -8,13 +8,14 @@ script_dir=`dirname $0`
 cd ${script_dir}/..
 
 pip install -U -r requirements/testing.txt \
-  -U -r requirements/optional.txt
+  -U -r requirements/optional.txt \
+  -U -r requirements/tools.txt
 
 echo "Generating code ..." && python scripts/codegen.py --path .
-echo "Running black (code formatter) ..." && black slack_sdk/
+echo "Running black (code formatter) ..." && ./scripts/format.sh --no-install
 
-black --check slack/ slack_sdk/ tests/ integration_tests/
-flake8 slack/ slack_sdk/
+echo "Running linting checks ..." && ./scripts/lint.sh --no-install
 
+echo "Running tests with coverage reporting ..."
 test_target="${1:-tests/}"
 PYTHONPATH=$PWD:$PYTHONPATH pytest --cov-report=xml --cov=slack_sdk/ $test_target