diff --git a/bin/test-with-real-projects.sh b/bin/test-with-real-projects.sh
index 77aeaa19ece..111cbc88d2d 100755
--- a/bin/test-with-real-projects.sh
+++ b/bin/test-with-real-projects.sh
@@ -33,7 +33,7 @@ psl)
 	git clone git@github.com:psalm/endtoend-test-psl.git
 	cd endtoend-test-psl
 	git checkout 2.3.x
-	composer install
+	composer install --ignore-platform-reqs
 	"$PSALM" --monochrome -c config/psalm.xml
 	"$PSALM" --monochrome -c config/psalm.xml tests/static-analysis
 	;;