diff --git a/goodwe_controller/test_safety90.py b/goodwe_controller/test_safety90.py
index 8d5840b..fffff28 100644
--- a/goodwe_controller/test_safety90.py
+++ b/goodwe_controller/test_safety90.py
@@ -266,6 +266,20 @@ check(f"⭐ ...each quarter's gap is counted on its own: a long gap at a low "
       f"load does not hide a shorter one in the next quarter ({a:.1f} W)",
       a <= AIM + TOL and sum("PEAK_GUARD_GAP" in e for e in c.events) == 2)
 
+
+
+def dip(t):
+    return 3000.0 if 450 <= t < 700 else 6500.0
+
+
+(rows, c), _o, a, b = case("N=1 two gaps, the second at a lower load", 1,
+                           dip, {"a": 99.0}, [(300, 360), (500, 560)])
+at = [float(e.split("counted at ")[1].split(" W")[0]) for e in c.events
+      if "PEAK_GUARD_GAP" in e]
+check(f"⭐ ...two gaps in one quarter: the second, at a lower load, does not "
+      f"price the first one down (counted at {at}; {a:.1f} W)",
+      a <= AIM + TOL and len(at) == 2 and min(at) >= 6400.0)
+
 # ============================================================================ #
 print("\n5. start-up mid-quarter (the add-on starts 450 s into the quarter)")
 UI = {}