diff --git a/.github/workflows/quality-check.yml b/.github/workflows/quality-check.yml
new file mode 100644
index 00000000..fa99fb57
--- /dev/null
+++ b/.github/workflows/quality-check.yml
@@ -0,0 +1,42 @@
+name: Open Prices unit and integration tests
+
+on:
+  push:
+    paths:
+      - "**/app/**"
+      - "pyproject.toml"
+      - "poetry.lock"
+      - "tests/**"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  unit-test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.11"
+
+    steps:
+      #----------------------------------------------
+      #       check-out repo
+      #----------------------------------------------
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      #----------------------------------------------
+      # Launch checks and tests
+      #----------------------------------------------
+      - name: Configure docker
+        run: |
+          # ensure a new line for .env file might not have it!
+          echo "" >> .env
+          # align user id
+          echo "USER_UID=$UID" >> .env
+          echo "PYTHON_VERSION=${{ matrix.python-version }}" >> .env
+
+      - name: Launch tests
+        run: make tests
diff --git a/Dockerfile b/Dockerfile
index 32fc4812..4642bd9a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,10 +38,10 @@ RUN poetry config virtualenvs.create false
 ENV POETRY_VIRTUALENVS_IN_PROJECT=false
 
 # create off user
-ARG OFF_UID=1000
-ARG OFF_GID=$OFF_UID
-RUN groupadd -g $OFF_GID off && \
-    useradd -u $OFF_UID -g off -m off && \
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+RUN groupadd -g $USER_GID off && \
+    useradd -u $USER_UID -g off -m off && \
     mkdir -p /home/off && \
     mkdir -p /opt/open-prices && \
     chown off:off -R /opt/open-prices /home/off
diff --git a/Makefile b/Makefile
index 4758a45f..1bc451db 100644
--- a/Makefile
+++ b/Makefile
@@ -125,6 +125,8 @@ docs:
 checks: toml-check flake8 black-check mypy isort-check docs
 
 
+tests: unit-tests integration-tests
+
 unit-tests:
 	@echo "🥫 Running tests …"
 	# change project name to run in isolation
diff --git a/app/crud.py b/app/crud.py
index 8ef0fb94..f46cbbbc 100644
--- a/app/crud.py
+++ b/app/crud.py
@@ -418,7 +418,7 @@ def create_proof_file(file: UploadFile) -> tuple[str, str]:
         # if the current directory contains 1000 images, we create a new one
         current_dir_id += 1
         current_dir = images_dir / str(current_dir_id)
-    current_dir.mkdir(exist_ok=True)
+    current_dir.mkdir(exist_ok=True, parents=True)
     full_file_path = current_dir / f"{file_stem}{extension}"
     # write the content of the file to the new file
     with full_file_path.open("wb") as f:
diff --git a/tests/integration/test_api.py b/tests/integration/test_api.py
index 0a204f73..c2a7b2f3 100644
--- a/tests/integration/test_api.py
+++ b/tests/integration/test_api.py
@@ -25,6 +25,7 @@ def override_get_db():
         db = session()
         yield db
     finally:
+        # close the DB session
         db.close()