diff --git a/test/vagrant-spec/scripts/ubuntu-run.virtualbox.sh b/test/vagrant-spec/scripts/ubuntu-run.virtualbox.sh
index 88e1244e2..da59855ca 100644
--- a/test/vagrant-spec/scripts/ubuntu-run.virtualbox.sh
+++ b/test/vagrant-spec/scripts/ubuntu-run.virtualbox.sh
@@ -7,6 +7,10 @@ export VAGRANT_SPEC_BOX="${VAGRANT_SPEC_BOX}"
 # Explicitly use Go binary
 export VAGRANT_PATH=/vagrant/vagrant
 
+# Explicitly set high open file limits... vagrant-ruby tends to run into the
+# default 1024 limit during some operations.
+ulimit -n 65535
+
 vagrant-spec ${VAGRANT_SPEC_ARGS} --config /vagrant/test/vagrant-spec/configs/vagrant-spec.config.virtualbox.rb
 result=$?