diff --git a/run-tests.sh b/run-tests.sh
index fcd312a..cd0619c 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -8,7 +8,7 @@
 # details.
 
 pydocstyle invenio_theme_tugraz tests docs && \
-#isort -rc -c -df && \
+isort -rc -c -df && \
 check-manifest --ignore ".travis-*" && \
 sphinx-build -qnNW docs docs/_build/html && \
 python setup.py test