diff --git a/.github/workflows/lint_test_and_doc.yml b/.github/workflows/lint_test_and_doc.yml
index 8f1f0445..b840fb74 100644
--- a/.github/workflows/lint_test_and_doc.yml
+++ b/.github/workflows/lint_test_and_doc.yml
@@ -27,7 +27,10 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pycodestyle pydocstyle toml tomli
+          pip install pycodestyle pydocstyle toml tomli pyflakes
+      - name: Run pyflakes on src and tests
+        run: |
+          pyflakes src tests
       - name: Run pycodestyle on src
         run: |
           pycodestyle --max-line-length=120 --ignore=W504 src
diff --git a/src/taylorism/__init__.py b/src/taylorism/__init__.py
index c083675a..3af152e8 100644
--- a/src/taylorism/__init__.py
+++ b/src/taylorism/__init__.py
@@ -18,6 +18,9 @@
 from .schedulers import BaseScheduler
 from .schedulers import MaxThreadsScheduler, binding_setup  # For compatibility
 
+assert BaseScheduler
+assert MaxThreadsScheduler
+
 taylorism_log = loggers.getLogger(__name__)
 
 # : timeout when polling for a Queue/Pipe communication