diff --git a/server/simulators/test.cpp b/server/simulators/test.cpp
index 2282f4d..779aa57 100644
--- a/server/simulators/test.cpp
+++ b/server/simulators/test.cpp
@@ -54,7 +54,10 @@ void Test_Sim::timer()
     {
         m_slider.set_value(0);
     }
-    m_slider.set_value(m_slider.value() + 1);
+    else
+    {
+        m_slider.set_value(m_slider.value() + 1);
+    }
     m_tab_widget.advance_tab();
     m_stacked_widget.advance_tab();
 }