diff --git a/.github/actions/setup-python-with-uv/action.yml b/.github/actions/setup-python-with-uv/action.yml
new file mode 100644
index 0000000..c572d26
--- /dev/null
+++ b/.github/actions/setup-python-with-uv/action.yml
@@ -0,0 +1,32 @@
+name: Install Python with uv
+description: |
+  This GitHub Action installs Python using the uv tool.
+  It pins the specified Python version, caches uv files, and installs dependencies.
+
+inputs:
+  python-version:
+    description: Python version
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Install uv
+      run: curl -LsSf https://astral.sh/uv/install.sh | sh
+      shell: bash
+
+    - name: Pin Python Version
+      run: |
+        export PYTHONUNBUFFERED=True
+        uv python pin ${{ inputs.python-version }}
+      shell: bash
+
+    - uses: actions/cache@v4
+      id: cache-uv
+      with:
+        path: ~/.cache/uv
+        key: ${{ runner.os }}-python-${{ inputs.python-version }}-uv
+
+    - name: Install Dependencies
+      run: uv sync
+      shell: bash
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 76c47f3..9cf4869 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -7,38 +7,41 @@ on:
     branches: [main]
 
 jobs:
-  test:
-    timeout-minutes: 60
+  pytest:
     runs-on: ubuntu-latest
+
     strategy:
       matrix:
-        python-version: ['3.10', '3.12']
-        
+        python-version: ["3.10", "3.11", "3.12"]
+
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v4
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-
-    - name: Install uv
-      uses: astral-sh/setup-uv@v3
-
-    - name: Check code formatting
-      run: uv run ruff check
-
-    - name: Check Python types
-      run: uv run mypy
-      
-    - name: Run tests
-      run: uv run pytest
-
-    - name: Upload coverage to Codecov
-      if: matrix.python-version == '3.12'
-      uses: codecov/codecov-action@v5
-      with:
-        files: ./coverage.xml
-        token: ${{ secrets.CODECOV_TOKEN }}
-        slug: oqtopus-team/tranqu
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python ${{ matrix.python-version }} with uv
+        uses: ./.github/actions/setup-python-with-uv
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Lint
+        run: uv run ruff check --output-format=github .
+
+      - name: Format
+        run: uv run ruff format . --check --diff
+
+      - name: Check Python types
+        run: uv run mypy
+
+      - name: Run Pytest if directory exists
+        run: |
+          if [ -d "./tests/" ]; then
+            uv run pytest -s
+          fi
+
+      - name: Upload coverage to Codecov
+        if: matrix.python-version == '3.12'
+        uses: codecov/codecov-action@v5
+        with:
+          files: ./coverage.xml
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: oqtopus-team/tranqu
diff --git a/src/tranqu/transpiler_dispatcher.py b/src/tranqu/transpiler_dispatcher.py
index fcd3025..8266390 100644
--- a/src/tranqu/transpiler_dispatcher.py
+++ b/src/tranqu/transpiler_dispatcher.py
@@ -147,7 +147,9 @@ def _convert_program(self, program: Any, from_lib: str, to_lib: Any) -> Any:  #
             to_lib,
         )
         if not (can_convert_to_qiskit and can_convert_to_target):
-            msg = f"No ProgramConverter path found to convert from {from_lib} to {to_lib}"  # noqa: E501
+            msg = (
+                f"No ProgramConverter path found to convert from {from_lib} to {to_lib}"
+            )
             raise ProgramConversionPathNotFoundError(msg)
 
         return self._program_converter_manager.fetch_converter(
@@ -183,7 +185,9 @@ def _convert_device(
             to_lib,
         )
         if not (can_convert_to_qiskit and can_convert_to_target):
-            msg = f"No DeviceConverter path found to convert from {from_lib} to {to_lib}"  # noqa: E501
+            msg = (
+                f"No DeviceConverter path found to convert from {from_lib} to {to_lib}"
+            )
             raise DeviceConversionPathNotFoundError(msg)
 
         return self._device_converter_manager.fetch_converter("qiskit", to_lib).convert(
diff --git a/tests/tranqu/test_tranqu.py b/tests/tranqu/test_tranqu.py
index eae8fcc..fa6f024 100644
--- a/tests/tranqu/test_tranqu.py
+++ b/tests/tranqu/test_tranqu.py
@@ -2,10 +2,15 @@
 
 import re
 
+import pytest
 from qiskit import QuantumCircuit as QiskitCircuit
 
 from tranqu import Tranqu, __version__
 from tranqu.program_converter import ProgramConverter
+from tranqu.transpiler_dispatcher import (
+    DeviceConversionPathNotFoundError,
+    ProgramConversionPathNotFoundError,
+)
 
 
 class EnigmaCircuit:
@@ -134,3 +139,30 @@ def test_transpile_openqasm3_program_for_oqtopus_device_with_qiskit_transpiler(
 c[1] = measure $2;
 """
             assert result.transpiled_program == expected_program
+
+    def test_program_conversion_path_not_found(self):
+        tranqu = Tranqu()
+        circuit = EnigmaCircuit()
+
+        with pytest.raises(
+            ProgramConversionPathNotFoundError,
+            match="No ProgramConverter path found to convert from enigma to qiskit",
+        ):
+            tranqu.transpile(circuit, "enigma", "qiskit")
+
+    def test_device_conversion_path_not_found(self):
+        tranqu = Tranqu()
+        circuit = QiskitCircuit(2)
+        device = {"name": "custom_device", "qubits": [], "couplings": []}
+
+        with pytest.raises(
+            DeviceConversionPathNotFoundError,
+            match="No DeviceConverter path found to convert from custom to qiskit",
+        ):
+            tranqu.transpile(
+                circuit,
+                program_lib="qiskit",
+                transpiler_lib="qiskit",
+                device=device,
+                device_lib="custom",
+            )