diff --git a/devstack-vm-gate.sh b/devstack-vm-gate.sh
index f22d6882..c7bc6256 100755
--- a/devstack-vm-gate.sh
+++ b/devstack-vm-gate.sh
@@ -47,7 +47,7 @@ function setup_localrc {
         sudo apt-get update
         sudo apt-get install python-yaml
     elif is_fedora; then
-        sudo yum install PyYAML
+        sudo yum install -y PyYAML
     fi
     MY_ENABLED_SERVICES=`cd $BASE/new/devstack-gate && ./test-matrix.py -b $LOCALRC_BRANCH -f $DEVSTACK_GATE_FEATURE_MATRIX`