Jun 25, 2025
diff --git a/agent/agentssh/x11_test.go b/agent/agentssh/x11_test.go

 c := sshClient(t, ln.Addr().String())

 // block off one port to test x11Forwarder evicts at highest port, not number of listeners.
 externalListener, err := inproc.Listen("tcp",
 fmt.Sprintf("localhost:%d", agentssh.X11StartPort+agentssh.X11DefaultDisplayOffset+1))
 require.NoError(t, err)
 defer externalListener.Close()

 // Calculate how many simultaneous X11 sessions we can create given the
 // configured port range.

 startPort := agentssh.X11StartPort + agentssh.X11DefaultDisplayOffset
 maxSessions := agentssh.X11MaxPort - startPort + 1
 maxSessions := agentssh.X11MaxPort - startPort + 1 - 1 // -1 for the blocked port
 require.Greater(t, maxSessions, 0, "expected a positive maxSessions value")

 // shellSession holds references to the session and its standard streams so
Original file line number	Diff line number	Diff line change
Expand Up		@@ -164,10 +164,17 @@ func TestServer_X11_EvictionLRU(t *testing.T) {

		c := sshClient(t, ln.Addr().String())

		// block off one port to test x11Forwarder evicts at highest port, not number of listeners.
		externalListener, err := inproc.Listen("tcp",
		fmt.Sprintf("localhost:%d", agentssh.X11StartPort+agentssh.X11DefaultDisplayOffset+1))
		require.NoError(t, err)
		defer externalListener.Close()

		// Calculate how many simultaneous X11 sessions we can create given the
		// configured port range.

		startPort := agentssh.X11StartPort + agentssh.X11DefaultDisplayOffset
		maxSessions := agentssh.X11MaxPort - startPort + 1
		maxSessions := agentssh.X11MaxPort - startPort + 1 - 1 // -1 for the blocked port
		require.Greater(t, maxSessions, 0, "expected a positive maxSessions value")

		// shellSession holds references to the session and its standard streams so
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