diff --git a/test/unit/plugins/provisioners/shell/provisioner_test.rb b/test/unit/plugins/provisioners/shell/provisioner_test.rb
index 8c9201717..8f83f2554 100644
--- a/test/unit/plugins/provisioners/shell/provisioner_test.rb
+++ b/test/unit/plugins/provisioners/shell/provisioner_test.rb
@@ -16,6 +16,7 @@ describe "Vagrant::Shell::Provisioner" do
       double(
         :config,
         :args        => "doesn't matter",
+        :env         => {},
         :upload_path => "arbitrary",
         :remote?     => false,
         :path        => nil,