diff --git a/.gitignore b/.gitignore
index 6b3d748..4317c5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,7 +77,7 @@ target/
 
 # IPython Notebook
 .ipynb_checkpoints
-*.ipynb
+Untitled*.ipynb
 .autoversion
 
 # pyenv
@@ -165,7 +165,6 @@ nbcelltests/labextension/*.tgz
 nbcelltests/labextension
 
 # generated
-*.ipynb
 Untitled_test.html
 Untitled_test.py
 docs/api
diff --git a/Makefile b/Makefile
index fd68e3a..9fec52d 100644
--- a/Makefile
+++ b/Makefile
@@ -84,7 +84,7 @@ clean: ## clean the repository
 	find . -name "*.pyc" | xargs rm -rf
 	find . -name ".ipynb_checkpoints" | xargs  rm -rf
 	rm -rf .coverage coverage *.xml build dist *.egg-info lib node_modules .pytest_cache *.egg-info
-	rm -rf nbcelltests/extension
+	rm -rf nbcelltests/labextension
 	cd js && jlpm clean
 	git clean -fd