diff --git a/src/renderer/src/components/terminal-pane/pty-renderer-delivery-claims.test.ts b/src/renderer/src/components/terminal-pane/pty-renderer-delivery-claims.test.ts
index e2a447601ec..bb0f0bbfff3 100644
--- a/src/renderer/src/components/terminal-pane/pty-renderer-delivery-claims.test.ts
+++ b/src/renderer/src/components/terminal-pane/pty-renderer-delivery-claims.test.ts
@@ -72,4 +72,27 @@ describe('renderer PTY delivery claims', () => {
     expect(setHiddenRendererPty).toHaveBeenLastCalledWith(PTY_ID, false)
     releaseRendererPtyVisibilityClaim(visiblePane)
   })
+  // STA-4393: the reveal path calls this directly (pty-connection.ts), and it is the
+  // half of the fix that clears a leftover hidden gate so a revealed renderer actually
+  // receives live frames. Without it the pane stays gated behind a stale hidden claim
+  // and sits ~10 frames behind the authoritative buffer.
+  it('clears a stale hidden gate when the reveal path declares delivery visible', () => {
+    const staleHidden = acquireHiddenRendererPtyDeliveryClaim(PTY_ID)
+    expect(setHiddenRendererPty).toHaveBeenLastCalledWith(PTY_ID, true)
+    staleHidden()
+
+    setHiddenRendererPty.mockReset()
+    declareRendererPtyDeliveryVisible(PTY_ID)
+
+    expect(setHiddenRendererPty).toHaveBeenCalledWith(PTY_ID, false)
+  })
+
+  it('does not ungate while a hidden owner still legitimately holds the PTY', () => {
+    acquireHiddenRendererPtyDeliveryClaim(PTY_ID)
+    setHiddenRendererPty.mockReset()
+
+    declareRendererPtyDeliveryVisible(PTY_ID)
+
+    expect(setHiddenRendererPty).not.toHaveBeenCalled()
+  })
 })