diff --git a/ScStwLibraries/headers/scstwtimer.h b/ScStwLibraries/headers/scstwtimer.h
index 48dfd17..8bdf412 100644
--- a/ScStwLibraries/headers/scstwtimer.h
+++ b/ScStwLibraries/headers/scstwtimer.h
@@ -122,7 +122,7 @@ public slots:
      * \param timeOfStart the point in time (msecs since epoch) when the timer is supposted to be started
      * \return false if the timer was not in the required state and therefore not started, true otherwise
      */
-    bool start(double timeOfStart);
+    virtual bool start(double timeOfStart);
 
     /*!
      * \brief Function to cancel the timer
@@ -169,7 +169,7 @@ public slots:
      *
      * \return false if the timer was not in the required state and therefore not reset, true otherwise
      */
-    bool reset();
+    virtual bool reset();
 
     // -- helper functions --
     /*!
@@ -274,7 +274,7 @@ protected slots:
      *
      * \see ScStwTimer::StopReason
      */
-    bool stop(StopReason reason, double timeOfStop);
+    virtual bool stop(StopReason reason, double timeOfStop);
 
     /*!
      * \brief Function to stop the timer
diff --git a/ScStwLibraries/sources/scstwtimer.cpp b/ScStwLibraries/sources/scstwtimer.cpp
index fc3df05..5d05881 100644
--- a/ScStwLibraries/sources/scstwtimer.cpp
+++ b/ScStwLibraries/sources/scstwtimer.cpp
@@ -53,7 +53,7 @@ void ScStwTimer::handleClimberStart(double timeOfStart) {
         return;
     }
 
-    // TODO: check if necessary: emit this->reactionTimeChanged();
+    emit this->reactionTimeChanged();
 }
 
 bool ScStwTimer::cancel() {