diff --git a/testkit/memory.c b/testkit/memory.c
index bb53ae5..a8abef2 100644
--- a/testkit/memory.c
+++ b/testkit/memory.c
@@ -250,8 +250,10 @@ static int test_memory_range(void *_args)
                 (a & (1u<< 1)) ? 'X' : '-', (a & (1u<< 0)) ? 'X' : '-');
         print_line(r);
         /* Wait for async exit. */
-        for (;;)
-            continue;
+        for (;;) {
+            delay_ms(500);
+            ciaa->pra ^= CIAAPRA_LED;
+        }
     }
 
     return 0;
diff --git a/testkit/testkit.c b/testkit/testkit.c
index 49ab8a3..69ada34 100644
--- a/testkit/testkit.c
+++ b/testkit/testkit.c
@@ -1167,8 +1167,11 @@ static void c_SOFT_IRQ(struct c_exception_frame *frame)
     prev_ciaapra = ciaapra;
 
     /* Perform an asynchronous function cancellation if so instructed. */
-    if (do_cancel)
+    if (do_cancel) {
         cancel_call(&test_cancellation, frame);
+        /* Memory test may mess with power LED / audio filter: Reset it. */
+        ciaa->pra &= ~CIAAPRA_LED;
+    }
 
     IRQ_RESET(INT_SOFT);
 }