diff --git a/run-tests.sh b/run-tests.sh
index 3987db88..49d2dd25 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -52,6 +52,8 @@ else
 	pip install -e "$(pwd)" --upgrade-strategy=only-if-needed
 
 	echo "Installing dependencies…"
+	PIPENV_PYTHON=2.7 pipenv run pip install -e .
+	PIPENV_PYTHON=3.6 pipenv run pip install -e .
 	PIPENV_PYTHON=2.7 pipenv install --dev
 	PIPENV_PYTHON=3.6 pipenv install --dev