diff --git a/tools/xen/test_functions.sh b/tools/xen/test_functions.sh
index 410df5f..5347238 100755
--- a/tools/xen/test_functions.sh
+++ b/tools/xen/test_functions.sh
@@ -173,6 +173,15 @@
     [ "$RESULT" = "tempdir" ]
 }
 
+function test_extract_remote_zipball_wget_fail {
+    set +e
+
+    local IGNORE
+    IGNORE=$(. mocks && extract_remote_zipball "failurl")
+
+    assert_previous_command_failed
+}
+
 function test_find_nova_plugins {
     local tmpdir=$(mktemp -d)