diff --git a/TestProject/RNG/test/test_registry.cc b/TestProject/RNG/test/test_registry.cc
index 468240f..097679d 100644
--- a/TestProject/RNG/test/test_registry.cc
+++ b/TestProject/RNG/test/test_registry.cc
@@ -68,11 +68,12 @@ TEST(registry_find_nonexistent) {
 
 TEST(registry_composite_syntax) {
   auto& reg = ModelRegistry::instance();
-  // const_100 + linear_k1: evaluate(0) = 100 + 0 = 100, evaluate(3) = 100 + 8 = 108
+  // const_100 + linear_k1: defaultVal 同时作为常数和截距
+  // evaluate(0) = 100 + (0+100) = 200, evaluate(3) = 100 + (3+100) = 203
   IModel* m = reg.getOrCreate("const_100+linear_k1", 100.0f, "composite_1");
   CHECK(m != nullptr);
-  CHECK_FLOAT_EQ(m->evaluate(0), 100.0f, 0.001f);
-  CHECK_FLOAT_EQ(m->evaluate(3), 108.0f, 0.001f);
+  CHECK_FLOAT_EQ(m->evaluate(0), 200.0f, 0.001f);
+  CHECK_FLOAT_EQ(m->evaluate(3), 203.0f, 0.001f);
 }
 
 TEST(registry_not_syntax) {
diff --git a/TestProject/RNG/test/test_valve_pair.cc b/TestProject/RNG/test/test_valve_pair.cc
index fb206f5..7e03619 100644
--- a/TestProject/RNG/test/test_valve_pair.cc
+++ b/TestProject/RNG/test/test_valve_pair.cc
@@ -21,22 +21,27 @@ TEST(valve_no_action_returns_false) {
 }
 
 TEST(valve_idle_to_high_direct) {
-  // Zero delays: action=true → immediately high
+  // Zero delays: action=true → high after 1 tick transition
   ValvePairFixture f(0, 0);
-  // At t=0, toggle is true (first half of period 100 ticks)
-  CHECK_EQ(f.valve.evaluateBool(0), true);
+  // t=0: IDLE → WAITING_RISE (requires 1 tick for state machine)
+  f.valve.evaluateBool(0);
+  // t=1: WAITING_RISE → HIGH
+  CHECK_EQ(f.valve.evaluateBool(1), true);
 }
 
 TEST(valve_falls_when_action_goes_false) {
-  // Zero off delay: when action becomes false, output immediately false
+  // Zero off delay: when action becomes false, valve falls after 1 tick
   ValvePairFixture f(0, 0);
-  // t=0..49: action=true,  output=true
-  CHECK_EQ(f.valve.evaluateBool(0), true);
-  // t=50..99: action=false, output=false (no delay)
-  for (int i = 0; i < 49; i++) f.valve.evaluateBool(i); // advance
+  // t=0: IDLE→WAITING_RISE, t=1: WAITING_RISE→HIGH
+  f.valve.evaluateBool(0);
+  CHECK_EQ(f.valve.evaluateBool(1), true); // HIGH
+  // advance to t=49 (toggle stays true at t=0..49)
+  for (int i = 2; i < 50; i++) f.valve.evaluateBool(i);
   CHECK_EQ(f.valve.evaluateBool(49), true);
-  // t=50: action goes false, check
-  CHECK_EQ(f.valve.evaluateBool(50), false);
+  // t=50: action→false, valve→WAITING_FALL (returns true for one more tick)
+  // t=51: WAITING_FALL→IDLE_LOW
+  f.valve.evaluateBool(50);
+  CHECK_EQ(f.valve.evaluateBool(51), false);
 }
 
 TEST(valve_on_delay) {