diff --git a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeScheduler_Modern.cpp b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeScheduler_Modern.cpp
index 1e24294dbbc..912ee4baf41 100644
--- a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeScheduler_Modern.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeScheduler_Modern.cpp
@@ -24,7 +24,7 @@ std::chrono::milliseconds getResolvedTimeoutForIdleTask(
           timeoutForSchedulerPriority(SchedulerPriority::IdlePriority)
       ? timeoutForSchedulerPriority(SchedulerPriority::LowPriority) +
           customTimeout
-      : timeoutForSchedulerPriority(SchedulerPriority::IdlePriority);
+      : customTimeout;
 }
 } // namespace
 
diff --git a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/SchedulerPriorityUtils.h b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/SchedulerPriorityUtils.h
index ca4e11d8307..ccba5e6c7b7 100644
--- a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/SchedulerPriorityUtils.h
+++ b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/SchedulerPriorityUtils.h
@@ -41,15 +41,15 @@ static inline std::chrono::milliseconds timeoutForSchedulerPriority(
     SchedulerPriority schedulerPriority) noexcept {
   switch (schedulerPriority) {
     case SchedulerPriority::ImmediatePriority:
-      return std::chrono::milliseconds(-1);
+      return std::chrono::milliseconds(0);
     case SchedulerPriority::UserBlockingPriority:
       return std::chrono::milliseconds(250);
     case SchedulerPriority::NormalPriority:
-      return std::chrono::milliseconds(5000);
+      return std::chrono::seconds(5);
     case SchedulerPriority::LowPriority:
-      return std::chrono::milliseconds(10'000);
+      return std::chrono::seconds(10);
     case SchedulerPriority::IdlePriority:
-      return std::chrono::milliseconds::max();
+      return std::chrono::minutes(5);
   }
 }
 
diff --git a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/RuntimeSchedulerTest.cpp b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/RuntimeSchedulerTest.cpp
index 7ec0e2d38ea..27bf5852ecd 100644
--- a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/RuntimeSchedulerTest.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/RuntimeSchedulerTest.cpp
@@ -332,6 +332,71 @@ TEST_P(RuntimeSchedulerTest, scheduleTwoTasksWithDifferentPriorities) {
   EXPECT_EQ(hostFunctionCallCount_, 2);
 }
 
+TEST_P(RuntimeSchedulerTest, scheduleTwoTasksWithAllPriorities) {
+  uint idlePriorityTaskCallOrder = 0;
+  auto idlePriTask = createHostFunctionFromLambda(
+      [this, &idlePriorityTaskCallOrder](bool /*unused*/) {
+        idlePriorityTaskCallOrder = hostFunctionCallCount_;
+        return jsi::Value::undefined();
+      });
+
+  uint lowPriorityTaskCallOrder = 0;
+  auto lowPriTask = createHostFunctionFromLambda(
+      [this, &lowPriorityTaskCallOrder](bool /*unused*/) {
+        lowPriorityTaskCallOrder = hostFunctionCallCount_;
+        return jsi::Value::undefined();
+      });
+
+  uint normalPriorityTaskCallOrder = 0;
+  auto normalPriTask = createHostFunctionFromLambda(
+      [this, &normalPriorityTaskCallOrder](bool /*unused*/) {
+        normalPriorityTaskCallOrder = hostFunctionCallCount_;
+        return jsi::Value::undefined();
+      });
+
+  uint userBlockingPriorityTaskCallOrder = 0;
+  auto userBlockingPriTask = createHostFunctionFromLambda(
+      [this, &userBlockingPriorityTaskCallOrder](bool /*unused*/) {
+        userBlockingPriorityTaskCallOrder = hostFunctionCallCount_;
+        return jsi::Value::undefined();
+      });
+
+  uint immediatePriorityTaskCallOrder = 0;
+  auto immediatePriTask = createHostFunctionFromLambda(
+      [this, &immediatePriorityTaskCallOrder](bool /*unused*/) {
+        immediatePriorityTaskCallOrder = hostFunctionCallCount_;
+        return jsi::Value::undefined();
+      });
+
+  runtimeScheduler_->scheduleTask(
+      SchedulerPriority::IdlePriority, std::move(idlePriTask));
+  runtimeScheduler_->scheduleTask(
+      SchedulerPriority::LowPriority, std::move(lowPriTask));
+  runtimeScheduler_->scheduleTask(
+      SchedulerPriority::NormalPriority, std::move(normalPriTask));
+  runtimeScheduler_->scheduleTask(
+      SchedulerPriority::UserBlockingPriority, std::move(userBlockingPriTask));
+  runtimeScheduler_->scheduleTask(
+      SchedulerPriority::ImmediatePriority, std::move(immediatePriTask));
+
+  EXPECT_EQ(idlePriorityTaskCallOrder, 0);
+  EXPECT_EQ(lowPriorityTaskCallOrder, 0);
+  EXPECT_EQ(normalPriorityTaskCallOrder, 0);
+  EXPECT_EQ(userBlockingPriorityTaskCallOrder, 0);
+  EXPECT_EQ(immediatePriorityTaskCallOrder, 0);
+  EXPECT_EQ(stubQueue_->size(), 1);
+
+  stubQueue_->tick();
+
+  EXPECT_EQ(idlePriorityTaskCallOrder, 5);
+  EXPECT_EQ(lowPriorityTaskCallOrder, 4);
+  EXPECT_EQ(normalPriorityTaskCallOrder, 3);
+  EXPECT_EQ(userBlockingPriorityTaskCallOrder, 2);
+  EXPECT_EQ(immediatePriorityTaskCallOrder, 1);
+  EXPECT_EQ(stubQueue_->size(), 0);
+  EXPECT_EQ(hostFunctionCallCount_, 5);
+}
+
 TEST_P(RuntimeSchedulerTest, cancelTask) {
   bool didRunTask = false;
   auto callback = createHostFunctionFromLambda([&didRunTask](bool /*unused*/) {
diff --git a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/SchedulerPriorityTest.cpp b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/SchedulerPriorityTest.cpp
index ade776cc2b1..d1807ad8146 100644
--- a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/SchedulerPriorityTest.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/tests/SchedulerPriorityTest.cpp
@@ -31,7 +31,7 @@ TEST(SchedulerPriorityTest, serialize) {
 TEST(SchedulerPriorityTest, timeoutForSchedulerPriority) {
   EXPECT_EQ(
       timeoutForSchedulerPriority(SchedulerPriority::ImmediatePriority),
-      std::chrono::milliseconds(-1));
+      std::chrono::milliseconds(0));
   EXPECT_EQ(
       timeoutForSchedulerPriority(SchedulerPriority::UserBlockingPriority),
       std::chrono::milliseconds(250));
@@ -43,5 +43,5 @@ TEST(SchedulerPriorityTest, timeoutForSchedulerPriority) {
       std::chrono::seconds(10));
   EXPECT_EQ(
       timeoutForSchedulerPriority(SchedulerPriority::IdlePriority),
-      std::chrono::milliseconds::max());
+      std::chrono::minutes(5));
 }