diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 486cd6ab4..37a7c4983 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -48,12 +48,6 @@ jobs:
         run: |
           poetry run -- nox -s links:check
 
-  build-matrix:
-    name: Generate Build Matrix
-    uses: ./.github/workflows/matrix-python.yml
-    permissions:
-      contents: read
-
   Changelog:
     name: Changelog Update Check
     runs-on: "ubuntu-24.04"
@@ -74,14 +68,15 @@ jobs:
         run: poetry run -- nox -s changelog:updated
 
   Lint:
-    name: Linting (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Linting (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "ubuntu-24.04"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - name: SCM Checkout
         uses: actions/checkout@v6
@@ -89,7 +84,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "2.3.0"
 
       - name: Run lint
@@ -98,21 +93,22 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: lint-python${{ matrix.python-version }}
+          name: lint-python${{ matrix.python-versions }}
           path: |
             .lint.txt
             .lint.json
           include-hidden-files: true
 
   Type-Check:
-    name: Type Checking (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Type Checking (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "ubuntu-24.04"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - name: SCM Checkout
@@ -121,21 +117,22 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "2.3.0"
 
       - name: Run type-check
         run: poetry run -- nox -s lint:typing
 
   Security:
-    name: Security Checks (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Security Checks (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "ubuntu-24.04"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - name: SCM Checkout
@@ -144,7 +141,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "2.3.0"
 
       - name: Run security linter
@@ -153,7 +150,7 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: security-python${{ matrix.python-version }}
+          name: security-python${{ matrix.python-versions }}
           path: .security.json
           include-hidden-files: true
 
@@ -214,14 +211,15 @@ jobs:
         run: poetry run -- nox -s lint:import
 
   Tests:
-    name: Unit-Tests (Python-${{ matrix.python-version }})
-    needs: [ Build-Packages, Lint-Imports, build-matrix ]
+    name: Unit-Tests (Python-${{ matrix.python-versions }})
+    needs: [ Build-Packages, Lint-Imports ]
     runs-on: "ubuntu-24.04"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - name: SCM Checkout
@@ -233,7 +231,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "2.3.0"
 
       - name: Run Tests and Collect Coverage
@@ -242,6 +240,6 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: coverage-python${{ matrix.python-version }}-fast
+          name: coverage-python${{ matrix.python-versions }}-fast
           path: .coverage
           include-hidden-files: true
diff --git a/doc/changes/unreleased.md b/doc/changes/unreleased.md
index fb4737052..549f78b52 100644
--- a/doc/changes/unreleased.md
+++ b/doc/changes/unreleased.md
@@ -1,3 +1,7 @@
 # Unreleased
 
 ## Summary
+
+## Feature
+
+* #673: Switched `checks.yml` to get Python versions for matrix from `BaseConfig`
diff --git a/exasol/toolbox/config.py b/exasol/toolbox/config.py
index 4b771e268..47ac24ff0 100644
--- a/exasol/toolbox/config.py
+++ b/exasol/toolbox/config.py
@@ -277,4 +277,5 @@ def github_template_dict(self) -> dict[str, Any]:
             "dependency_manager_version": self.dependency_manager.version,
             "minimum_python_version": self.minimum_python_version,
             "os_version": self.os_version,
+            "python_versions": self.python_versions,
         }
diff --git a/exasol/toolbox/templates/github/workflows/checks.yml b/exasol/toolbox/templates/github/workflows/checks.yml
index 7c658c6f5..231ada753 100644
--- a/exasol/toolbox/templates/github/workflows/checks.yml
+++ b/exasol/toolbox/templates/github/workflows/checks.yml
@@ -48,12 +48,6 @@ jobs:
         run: |
           poetry run -- nox -s links:check
 
-  build-matrix:
-    name: Generate Build Matrix
-    uses: ./.github/workflows/matrix-python.yml
-    permissions:
-      contents: read
-
   Changelog:
     name: Changelog Update Check
     runs-on: "(( os_version ))"
@@ -74,14 +68,15 @@ jobs:
         run: poetry run -- nox -s changelog:updated
 
   Lint:
-    name: Linting (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Linting (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "(( os_version ))"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: (( python_versions | tojson ))
     steps:
       - name: SCM Checkout
         uses: actions/checkout@v6
@@ -89,7 +84,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/python-environment@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "(( dependency_manager_version ))"
 
       - name: Run lint
@@ -98,21 +93,22 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: lint-python${{ matrix.python-version }}
+          name: lint-python${{ matrix.python-versions }}
           path: |
             .lint.txt
             .lint.json
           include-hidden-files: true
 
   Type-Check:
-    name: Type Checking (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Type Checking (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "(( os_version ))"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: (( python_versions | tojson ))
 
     steps:
       - name: SCM Checkout
@@ -121,21 +117,22 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/python-environment@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "(( dependency_manager_version ))"
 
       - name: Run type-check
         run: poetry run -- nox -s lint:typing
 
   Security:
-    name: Security Checks (Python-${{ matrix.python-version }})
-    needs: [ Version-Check, build-matrix ]
+    name: Security Checks (Python-${{ matrix.python-versions }})
+    needs: [ Version-Check ]
     runs-on: "(( os_version ))"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: (( python_versions | tojson ))
 
     steps:
       - name: SCM Checkout
@@ -144,7 +141,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/python-environment@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "(( dependency_manager_version ))"
 
       - name: Run security linter
@@ -153,7 +150,7 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: security-python${{ matrix.python-version }}
+          name: security-python${{ matrix.python-versions }}
           path: .security.json
           include-hidden-files: true
 
@@ -196,14 +193,15 @@ jobs:
         run: poetry run -- nox -s package:check
 
   Tests:
-    name: Unit-Tests (Python-${{ matrix.python-version }})
-    needs: [ Build-Packages, build-matrix ]
+    name: Unit-Tests (Python-${{ matrix.python-versions }})
+    needs: [ Build-Packages ]
     runs-on: "(( os_version ))"
     permissions:
       contents: read
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
+      matrix:
+        python-versions: (( python_versions | tojson ))
 
     steps:
       - name: SCM Checkout
@@ -212,7 +210,7 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/python-environment@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python-versions }}
           poetry-version: "(( dependency_manager_version ))"
 
       - name: Run Tests and Collect Coverage
@@ -221,6 +219,6 @@ jobs:
       - name: Upload Artifacts
         uses: actions/upload-artifact@v6
         with:
-          name: coverage-python${{ matrix.python-version }}-fast
+          name: coverage-python${{ matrix.python-versions }}-fast
           path: .coverage
           include-hidden-files: true
diff --git a/test/unit/config_test.py b/test/unit/config_test.py
index c2790dbb4..cba1e54b4 100644
--- a/test/unit/config_test.py
+++ b/test/unit/config_test.py
@@ -38,6 +38,13 @@ def test_works_as_defined(test_project_config_factory):
                 "dependency_manager_version": "2.3.0",
                 "minimum_python_version": "3.10",
                 "os_version": "ubuntu-24.04",
+                "python_versions": (
+                    "3.10",
+                    "3.11",
+                    "3.12",
+                    "3.13",
+                    "3.14",
+                ),
             },
             "minimum_python_version": "3.10",
             "os_version": "ubuntu-24.04",