diff --git a/tests/test_tasklets.cc b/tests/test_tasklets.cc
index 3097c06e9..57eb65dfb 100644
--- a/tests/test_tasklets.cc
+++ b/tests/test_tasklets.cc
@@ -35,6 +35,7 @@
 
 std::mutex outputMutex;
 
+// The runner is created on the heap for the assertion and outputs in the run function of the tasklets.
 Opm::TaskletRunner *runner;
 
 class SleepTasklet : public Opm::TaskletInterface
diff --git a/tests/test_tasklets_failure.cc b/tests/test_tasklets_failure.cc
index 01a891503..35ec6be73 100644
--- a/tests/test_tasklets_failure.cc
+++ b/tests/test_tasklets_failure.cc
@@ -43,6 +43,7 @@
 
 std::mutex outputMutex;
 
+// The runner is created on the heap for the assertion and outputs in the run function of the tasklets.
 Opm::TaskletRunner *runner;
 
 class SleepTasklet : public Opm::TaskletInterface