diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 059479a..a183387 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -25,6 +25,5 @@ jobs:
       - name: Run tests inside Docker container
         run: |
           docker run \
-            -e HARMONY_LITE=no_transformers \
             -e PYTHONPATH=/app/src \
             harmony-test
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8a492a7..0cbbcfd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,9 +12,7 @@ on:
     paths-ignore:
       - README.md
   workflow_dispatch:
-env:
-  HARMONY_LITE: no_transformers
-          
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -23,11 +21,17 @@ jobs:
         python: [3.10.11]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
+          cache: 'pip'
+          cache-dependency-path: pyproject.toml
+      - name: Lint with ruff
+        run: |
+          pip install ruff
+          ruff check src tests
       - name: Install Tox
         run: pip install tox
       - name: Setup Java
diff --git a/src/harmony/__init__.py b/src/harmony/__init__.py
index 6623ba6..31e8a39 100644
--- a/src/harmony/__init__.py
+++ b/src/harmony/__init__.py
@@ -22,6 +22,7 @@
 __version__ = "1.0.7"
 # TODO: make these configurable at package level
 import os
+import warnings
 from .examples import example_instruments
 from .schemas import *
 from .util.instrument_helper import create_instrument_from_list, import_instrument_into_harmony_web
@@ -58,4 +59,9 @@ def generate_basic_harmony_report(*args, **kwargs):
     try:
         from .matching.default_matcher import match_instruments
     except ModuleNotFoundError:
-        print("Warning: transformers not available. To use transformers, run pip install sentence-transformers")
+        warnings.warn(
+            "transformers not available. To use transformers, run "
+            "pip install sentence-transformers",
+            ImportWarning,
+            stacklevel=2,
+        )