diff --git a/test/MuxManagerTest.cpp b/test/MuxManagerTest.cpp
index 48e21a4..532dbe2 100644
--- a/test/MuxManagerTest.cpp
+++ b/test/MuxManagerTest.cpp
@@ -115,7 +115,7 @@ bool MuxManagerTest::getIfUseWellKnownMac(std::string port)
     return muxPortPtr->mMuxPortConfig.getIfUseWellKnownMacActiveActive();
 }
 
-bool MuxManagerTest::setUseWellKnownMacActiveActive(bool use)
+void MuxManagerTest::setUseWellKnownMacActiveActive(bool use)
 {
     mMuxManagerPtr->setUseWellKnownMacActiveActive(use);
 }
diff --git a/test/MuxManagerTest.h b/test/MuxManagerTest.h
index 2aaa592..d169344 100644
--- a/test/MuxManagerTest.h
+++ b/test/MuxManagerTest.h
@@ -58,7 +58,7 @@ class MuxManagerTest: public testing::Test
     uint32_t getLinkWaitTimeout_msec(std::string port);
     uint32_t getOscillationInterval_sec(std::string port);
     bool getIfUseWellKnownMac(std::string port);
-    bool setUseWellKnownMacActiveActive(bool use);
+    void setUseWellKnownMacActiveActive(bool use);
     bool getIfUseToRMac(std::string port);
     bool getOscillationEnabled(std::string port);
     common::MuxPortConfig::LinkProberType getLinkProberType(const std::string &port);