diff --git a/lib/nodes/test_rtt.cpp b/lib/nodes/test_rtt.cpp
index f7a31c7b7..378706f81 100644
--- a/lib/nodes/test_rtt.cpp
+++ b/lib/nodes/test_rtt.cpp
@@ -85,7 +85,7 @@ json_t *TestRTT::Case::getMetadata() {
 }
 
 double TestRTT::Case::getEstimatedDuration() const {
-  return (count_warmup + count) / rate;
+  return (count_warmup + count) / rate + cooldown;
 }
 
 int TestRTT::prepare() {