diff --git a/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.cpp b/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.cpp
index e0c29afb..ce38cffc 100644
--- a/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.cpp
+++ b/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.cpp
@@ -87,6 +87,22 @@ namespace MGITest {
         return session && session->Control() && session->Control()->producerParked.load(std::memory_order_acquire);
 #else
         return false;
+#endif
+    }
+    bool WaitForSplitAppliedForTesting(unsigned long long seq, unsigned int timeoutMs) {
+#if defined(MGITEST_SPLIT_RUNTIME_PEEK_LIVE)
+        auto* session = MobileGL::MG_Remote::Client::ClientSession::Active();
+        auto* control = session ? session->Control() : nullptr;
+        if (!control) return false;
+        const auto until = std::chrono::steady_clock::now() + std::chrono::milliseconds(timeoutMs);
+        do {
+            if (control->appliedSeq.load(std::memory_order_acquire) >= seq) return true;
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+        } while (std::chrono::steady_clock::now() < until);
+        return control->appliedSeq.load(std::memory_order_acquire) >= seq;
+#else
+        (void)seq; (void)timeoutMs;
+        return false;
 #endif
     }
     void DelaySplitRetirementForTesting(bool enabled) {
diff --git a/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.h b/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.h
index 0c519ec1..874e2739 100644
--- a/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.h
+++ b/MobileGL/MG_IntegrationTest/Harness/SplitRuntimePeek.h
@@ -121,6 +121,9 @@ namespace MGITest {
     bool SplitApplyHoldIsActiveForTesting();
     void ReleaseSplitApplyHoldForTesting();
     bool SplitProducerIsParkedForTesting();
+    // Observe completion for assertions about an emitted frame; does not emit a
+    // GL command or change the production wait rule.
+    bool WaitForSplitAppliedForTesting(unsigned long long seq, unsigned int timeoutMs = 5000);
 
 
     // Empty when this process is a real split run that can be asserted about; otherwise the
diff --git a/MobileGL/MG_IntegrationTest/Scenarios/F1WireScenario.cpp b/MobileGL/MG_IntegrationTest/Scenarios/F1WireScenario.cpp
index 71fc6c97..891efb35 100644
--- a/MobileGL/MG_IntegrationTest/Scenarios/F1WireScenario.cpp
+++ b/MobileGL/MG_IntegrationTest/Scenarios/F1WireScenario.cpp
@@ -161,6 +161,9 @@ void main() { color = vec4(value, 0.25, 0.75, 1.0); }
         EXPECT_NEAR(pixel[2], 191, 1);
         EXPECT_EQ(pixel[3], 255);
         Gl().EndFrame();
+        // Present returns before apply under run-ahead. Inspect this completed
+        // frame's window, not the previous (possibly empty setup) log line.
+        ASSERT_TRUE(WaitForSplitAppliedForTesting(PeekSplitRuntime().emitSeq));
         const auto window = PipeStatsWindow::LastFromLaneLog();
         ASSERT_TRUE(window.found) << "P5f rsp window missing on frame " << frame;
         // Magma does not publish Espryt's draw counter. The changing uniform and