diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
index 2e6a659..f5a5d42 100644
--- a/.github/workflows/publish_pypi.yml
+++ b/.github/workflows/publish_pypi.yml
@@ -109,3 +109,29 @@ jobs:
         GITHUB_TOKEN: ${{ github.token }}
       run: |
         gh release upload '${{ github.ref_name }}' dist/** --repo '${{ github.repository }}'
+
+  publish-to-testpypi:
+      name: Publish Python 🐍 distribution 📦 to TestPyPI
+      if: startsWith(github.ref, 'refs/tags/')
+      needs:
+      - build
+      runs-on: ubuntu-latest
+
+      environment:
+        name: testpypi
+        url: https://test.pypi.org/p/${{ matrix.package }}
+
+      permissions:
+        id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+      steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v3
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution 📦 to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+          password: ${{ secrets.TEST_PYPI_API_TOKEN }}
\ No newline at end of file
diff --git a/packages/happtiq_commons_google_cloud/src/happtiq_commons_google_cloud/gcs_api_service.py b/packages/happtiq_commons_google_cloud/src/happtiq_commons_google_cloud/gcs_api_service.py
index 33f66c9..c7403b7 100644
--- a/packages/happtiq_commons_google_cloud/src/happtiq_commons_google_cloud/gcs_api_service.py
+++ b/packages/happtiq_commons_google_cloud/src/happtiq_commons_google_cloud/gcs_api_service.py
@@ -37,3 +37,14 @@ def upload_file(self, file_path: bytes,  bucket_name: str, destination: str, con
         blob.upload_from_filename(file_path, content_type=content_type, timeout=self.timeout)
         self.logger.info(f"File uploaded to {destination}.")
         return f"gs://{bucket_name}/{destination}"
+    
+    def list_files_with_prefix(self, bucket_name: str, prefix: str):
+        self.logger.info(f"Listing files in bucket {bucket_name} with prefix {prefix}")
+        bucket = self.client.bucket(bucket_name)
+        blobs = bucket.list_blobs(prefix=prefix)
+
+        file_list = [blob.name for blob in blobs]
+        self.logger.debug(f"Files in bucket {bucket_name} with prefix {prefix}: {file_list}")
+        self.logger.info(f"found {len(file_list)} files in bucket {bucket_name} with prefix {prefix}")
+    
+        return file_list
diff --git a/packages/happtiq_commons_google_cloud/tests/happtiq_commons_google_cloud/gcs_service_test.py b/packages/happtiq_commons_google_cloud/tests/happtiq_commons_google_cloud/gcs_service_test.py
index a5b5e9e..370a147 100644
--- a/packages/happtiq_commons_google_cloud/tests/happtiq_commons_google_cloud/gcs_service_test.py
+++ b/packages/happtiq_commons_google_cloud/tests/happtiq_commons_google_cloud/gcs_service_test.py
@@ -75,3 +75,25 @@ def test_upload_file_gzipped(gcs_api_service, monkeypatch):
     gcs_api_service.client.bucket().blob.assert_called_once_with(destination)
     gcs_api_service.client.bucket().blob(destination).upload_from_filename.assert_called_once_with(file_path, content_type=content_type, timeout=30)
     gcs_api_service.client.bucket().blob(destination).content_encoding = "gzip"
+
+def test_list_files_with_prefix(gcs_api_service, monkeypatch):
+    mock_client = MagicMock()
+    mock_bucket = MagicMock()
+    mock_blob1 = MagicMock()
+    mock_blob1.name = "file1.txt"
+    mock_blob2 = MagicMock()
+    mock_blob2.name = "file2.txt"
+    mock_blobs = [mock_blob1,mock_blob2]
+
+    mock_client.bucket.return_value = mock_bucket
+    mock_bucket.list_blobs.return_value = mock_blobs
+    monkeypatch.setattr(gcs_api_service, "client", mock_client)
+
+    bucket_name = "test-bucket"
+    prefix = "test-prefix/"
+
+    result = gcs_api_service.list_files_with_prefix(bucket_name, prefix)
+
+    assert result == ["file1.txt", "file2.txt"]
+    mock_client.bucket.assert_called_once_with(bucket_name)
+    mock_bucket.list_blobs.assert_called_once_with(prefix=prefix)