diff --git a/src/tests/rpp/test_debounce.cpp b/src/tests/rpp/test_debounce.cpp
index 515afcb1b..8ff4c3033 100644
--- a/src/tests/rpp/test_debounce.cpp
+++ b/src/tests/rpp/test_debounce.cpp
@@ -22,7 +22,8 @@ SCENARIO("debounce emit only items where timeout reached", "[operators][debounce
     GIVEN("subject of items and subscriber subscribed on it via debounce")
     {
         auto mock = mock_observer<int>{};
-        auto subj = rpp::subjects::publish_subject<int>{};
+        std::optional<rpp::subjects::publish_subject<int>> optional_subj{rpp::subjects::publish_subject<int>{}};
+        auto& subj = optional_subj.value();
         subj.get_observable().debounce(debounce_delay, scheduler).subscribe(mock);
         WHEN("emit value")
         {
@@ -96,6 +97,19 @@ SCENARIO("debounce emit only items where timeout reached", "[operators][debounce
                     }
                 }
             }
+            AND_WHEN("subject destoryed and then schedulable reaches schedulable")
+            {
+                optional_subj.reset();
+                scheduler.time_advance(debounce_delay);
+                THEN("emission reached mock")
+                {
+                    CHECK(scheduler.get_schedulings() == std::vector{start+debounce_delay});
+                    CHECK(scheduler.get_executions() == std::vector{start+debounce_delay});
+                    CHECK(mock.get_received_values() == std::vector{1});
+                    CHECK(mock.get_on_error_count() == 0);
+                    CHECK(mock.get_on_completed_count() == 0);
+                }
+            }
         }
     }
 }
diff --git a/src/tests/rpp/test_delay.cpp b/src/tests/rpp/test_delay.cpp
index bdd78ea7c..779da8cf5 100644
--- a/src/tests/rpp/test_delay.cpp
+++ b/src/tests/rpp/test_delay.cpp
@@ -9,6 +9,7 @@
 //  Project home: https://github.com/victimsnino/ReactivePlusPlus
 
 #include "mock_observer.hpp"
+#include <test_scheduler.hpp>
 
 #include <catch2/catch_test_macros.hpp>
 #include <rpp/operators/delay.hpp>
@@ -148,5 +149,18 @@ SCENARIO("delay mirrors both source observable and trigger observable", "[delay]
                 }
             }
         }
+        WHEN("subscribe on subject via delay via test_scheduler, sent value")
+        {
+            subj.get_observable()
+                .delay(std::chrono::seconds{30000}, test_scheduler{})
+                .subscribe(mock);
+
+            subj.get_subscriber().on_next(1);
+
+            AND_THEN("no memory leak")
+            {
+                // checked via sanitizer
+            }
+        }
     }
 }
diff --git a/src/tests/utils/test_scheduler.hpp b/src/tests/utils/test_scheduler.hpp
index 6f9abb0c9..3b96bcd81 100644
--- a/src/tests/utils/test_scheduler.hpp
+++ b/src/tests/utils/test_scheduler.hpp
@@ -58,23 +58,26 @@ class test_scheduler final : public rpp::schedulers::details::scheduler_tag
     class worker_strategy
     {
     public:
-        worker_strategy(std::shared_ptr<state> state)
+        worker_strategy(std::weak_ptr<state> state)
             : m_state{state} { }
 
         void defer_at(rpp::schedulers::time_point                        time_point,
                       rpp::schedulers::constraint::schedulable_fn auto&& fn) const
         {
-            if (m_state->sub.is_subscribed())
+            if (auto locked = m_state.lock())
             {
-                m_state->schedule(time_point, std::forward<decltype(fn)>(fn));
-                m_state->drain();
+                if (locked->sub.is_subscribed())
+                {
+                    locked->schedule(time_point, std::forward<decltype(fn)>(fn));
+                    locked->drain();
+                }
             }
         }
 
         static rpp::schedulers::time_point now() { return s_current_time; }
 
     private:
-        std::shared_ptr<state> m_state;
+        std::weak_ptr<state> m_state;
     };
 
     test_scheduler() {}