diff --git a/face_detector/test/common_rtest.xml b/face_detector/test/common_rtest.xml
index 05400257..a941505f 100644
--- a/face_detector/test/common_rtest.xml
+++ b/face_detector/test/common_rtest.xml
@@ -23,7 +23,7 @@
 
     <test pkg="rostest" type="publishtest"
           test-name="pubtest_detectedface" name="pubtest_detectedface" retry="$(arg RETRY_TEST)">
-      <rosparam>
+      <rosparam subst_value="True">
         topics:
           - name: $(arg topicname_hztest)
             timeout: 5