diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index bb0096ce..41a30d2c 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -3,7 +3,15 @@
 MAGNUM_UI_DIR=$(cd $(dirname $BASH_SOURCE)/.. && pwd)
 
 function install_magnum_ui {
+    # NOTE(shu-mutou): workaround for devstack bug: 1540328
+    # where devstack install 'test-requirements' but should not do it
+    # for magnum-ui project as it installs Horizon from url.
+    # Remove following two 'mv' commands when mentioned bug is fixed.
+    mv $MAGNUM_UI_DIR/test-requirements.txt $MAGNUM_UI_DIR/_test-requirements.txt
+
     setup_develop ${MAGNUM_UI_DIR}
+
+    mv $MAGNUM_UI_DIR/_test-requirements.txt $MAGNUM_UI_DIR/test-requirements.txt
 }
 
 function configure_magnum_ui {