diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index c527cc2e6..d1e44c6ef 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -605,7 +605,7 @@ function apply_user_presets() {
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
-        SRS_UTEST=NO
+        SRS_UTEST=YES
         SRS_GPERF=NO
         SRS_GPERF_MC=NO
         SRS_GPERF_MP=NO
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 1fc7680dd..31b5d0390 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -436,7 +436,6 @@ SrsConfDirective* SrsConfDirective::copy()
     cp->conf_line = conf_line;
     cp->name = name;
     cp->args = args;
-    cp->create_time = create_time;
 
     for (int i = 0; i < (int)directives.size(); i++) {
         SrsConfDirective* directive = directives.at(i);
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index e05c770fa..0bbf01032 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -189,6 +189,10 @@ private:
     * 3. if ret flag indicates there are child-directives, read_conf(directive, block) recursively.
     */
     virtual int parse_conf(_srs_internal::SrsConfigBuffer* buffer, SrsDirectiveType type);
+    /**
+     * deep copy the directive.
+     */
+    virtual SrsConfDirective* copy();
     /**
     * read a token from buffer.
     * a token, is the directive args and a flag indicates whether has child-directives.