@@ -537,14 +537,20 @@ function exit_trap {

     if [[ $r -ne 0 ]]; then

         echo "Error on exit"

-        generate-subunit $DEVSTACK_START_TIME $SECONDS 'fail' >> ${SUBUNIT_OUTPUT}

+        # If we error before we've installed os-testr, which will fail.

+        if type -p generate-subunit > /dev/null; then

+            generate-subunit $DEVSTACK_START_TIME $SECONDS 'fail' >> ${SUBUNIT_OUTPUT}

+        fi

         if [[ -z $LOGDIR ]]; then

             $TOP_DIR/tools/worlddump.py

         else

             $TOP_DIR/tools/worlddump.py -d $LOGDIR

         fi

     else

-        generate-subunit $DEVSTACK_START_TIME $SECONDS >> ${SUBUNIT_OUTPUT}

+        # If we error before we've installed os-testr, which will fail.

+        if type -p generate-subunit > /dev/null; then

+            generate-subunit $DEVSTACK_START_TIME $SECONDS >> ${SUBUNIT_OUTPUT}

+        fi

     fi

     exit $r