diff --git a/bin/test-with-real-projects.sh b/bin/test-with-real-projects.sh
index abfe93300..ea2c10876 100755
--- a/bin/test-with-real-projects.sh
+++ b/bin/test-with-real-projects.sh
@@ -13,3 +13,10 @@ git checkout 69a81ac # bugfix
 composer install
 ~/project/build/psalm.phar --config=.psalm/config.xml --monochrome --show-info=false
 ~/project/build/psalm.phar --config=.psalm/static-analysis.xml --monochrome
+
+cd /tmp/testing-with-real-projects
+
+git clone git@github.com:doctrine/collections.git
+cd collections
+composer install
+~/project/psalm --monochrome --show-info=false