diff --git a/tests/manual/gdbdebugger/simple/simple_gdbtest_app.cpp b/tests/manual/gdbdebugger/simple/simple_gdbtest_app.cpp
index 14964b7195e..96d62dbdf06 100644
--- a/tests/manual/gdbdebugger/simple/simple_gdbtest_app.cpp
+++ b/tests/manual/gdbdebugger/simple/simple_gdbtest_app.cpp
@@ -1878,6 +1878,9 @@ void testEndlessRecursion()
 int testEndlessLoop()
 {
     qlonglong a = 1;
+    // gdb:
+    // Breakpoint at "while" will stop only once
+    // Hitting "Pause" button might show backtrace of different thread
     while (a > 0)
         ++a;
     return a;