diff --git a/tests/letstest/scripts/test_sdists.sh b/tests/letstest/scripts/test_sdists.sh
index 347589e04..dc024c567 100755
--- a/tests/letstest/scripts/test_sdists.sh
+++ b/tests/letstest/scripts/test_sdists.sh
@@ -27,7 +27,7 @@ VERSION=$("$PYTHON_NAME" letsencrypt-auto-source/version.py)
 tools/pip_install.py pytest
 
 # build sdists
-for pkg_dir in acme . $PLUGINS; do
+for pkg_dir in acme certbot $PLUGINS; do
     cd $pkg_dir
     python setup.py clean
     rm -rf build dist