-test_full_empty_stream $extra_opt
-test_full_simple_stream $extra_opt
-test_incr_empty_stream $extra_opt
-test_incr_simple_stream $extra_opt
+test_full_empty_stream "$extra_opt"
+test_full_simple_stream "$extra_opt"
+test_incr_empty_stream "$extra_opt"
+test_incr_simple_stream "$extra_opt"