diff --git a/tests/legacy/kernel/test_context/src/context.c b/tests/legacy/kernel/test_context/src/context.c
index 47305d5bca2..108d7500f49 100644
--- a/tests/legacy/kernel/test_context/src/context.c
+++ b/tests/legacy/kernel/test_context/src/context.c
@@ -760,6 +760,12 @@ static int test_timeout(void)
 					break;
 				}
 			}
+
+			if (j == NUM_TIMEOUT_FIBERS) {
+				TC_ERROR(" *** array overrun: all timeout order values should have been between the boundaries\n");
+				return TC_FAIL;
+			}
+
 			task_fiber_delayed_start_cancel(delayed_fibers[j]);
 			++next_cancellation;
 			continue;