diff --git a/CMakeLists.txt b/CMakeLists.txt
index 508da988..182d257a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ if(CMAKE_HOST_WIN32 AND DEFINED CMAKE_TOOLCHAIN_FILE AND CMAKE_TOOLCHAIN_FILE MA
     set(VCPKG_TARGET_TRIPLET "x64-windows-static" CACHE STRING "Vcpkg target triplet" FORCE)
 endif()
 
-project(acecode VERSION 1.0.15 LANGUAGES C CXX)
+project(acecode VERSION 1.0.16 LANGUAGES C CXX)
 
 include(${CMAKE_SOURCE_DIR}/cmake/acecode_source_guards.cmake)
 
diff --git a/tests/desktop/daemon_pool_test.cpp b/tests/desktop/daemon_pool_test.cpp
index c627cb5b..9e179355 100644
--- a/tests/desktop/daemon_pool_test.cpp
+++ b/tests/desktop/daemon_pool_test.cpp
@@ -14,6 +14,7 @@
 #include <chrono>
 #include <filesystem>
 #include <fstream>
+#include <limits>
 #include <mutex>
 #include <thread>
 #include <vector>
@@ -444,15 +445,18 @@ TEST(DaemonPool, AttachedDaemonStopsWhenKeepAliveIsDisabled) {
 }
 
 TEST(DaemonPool, IncompatibleManagedDaemonIsStoppedBeforeReplacementSpawn) {
+    // A normal mock PID can belong to an unrelated process on a busy runner.
+    const auto stopped_pid = (std::numeric_limits<int>::max)();
+    ASSERT_FALSE(acecode::daemon::is_pid_alive(stopped_pid));
     auto state = std::make_shared<MockSupervisor::SharedState>();
     DaemonPool pool;
     pool.set_supervisor_factory_for_test([&] {
         return std::unique_ptr<IDaemonSupervisor>(new MockSupervisor(state));
     });
-    pool.set_existing_daemon_probe_for_test([](const ActivateRequest&) {
+    pool.set_existing_daemon_probe_for_test([stopped_pid](const ActivateRequest&) {
         ExistingDaemonProbeResult existing;
         existing.action = ExistingDaemonAction::Replace;
-        existing.pid = 4242;
+        existing.pid = stopped_pid;
         existing.guid = "old-guid";
         existing.reason = "protocol mismatch";
         return existing;
diff --git a/tests/web/web_server_smoke_test.cpp b/tests/web/web_server_smoke_test.cpp
index 40a86607..c65ee6b9 100644
--- a/tests/web/web_server_smoke_test.cpp
+++ b/tests/web/web_server_smoke_test.cpp
@@ -13510,11 +13510,13 @@ std::vector<acecode::ChatMessage> wait_for_user_messages(
     std::vector<acecode::ChatMessage> users;
     const auto deadline = std::chrono::steady_clock::now() + 10s;
     while (std::chrono::steady_clock::now() < deadline) {
-        users.clear();
-        for (const auto& message : entry.loop->messages()) {
-            if (acecode::is_real_user_message(message)) users.push_back(message);
-        }
-        if (users.size() >= expected_count && !entry.loop->is_busy()) break;
+        const bool idle = entry.loop->try_run_idle_control([&] {
+            users.clear();
+            for (const auto& message : entry.loop->messages()) {
+                if (acecode::is_real_user_message(message)) users.push_back(message);
+            }
+        });
+        if (idle && users.size() >= expected_count) break;
         std::this_thread::sleep_for(10ms);
     }
     return users;
diff --git a/vcpkg.json b/vcpkg.json
index 4d0c4f10..734d0c6c 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "acecode",
-  "version-semver": "1.0.15",
+  "version-semver": "1.0.16",
   "dependencies": [
     "cpr",
     {