diff --git a/SVSim.UnitTests/Controllers/FreeBattleControllerTests.cs b/SVSim.UnitTests/Controllers/FreeBattleControllerTests.cs
index 9603d539..7dd8e46d 100644
--- a/SVSim.UnitTests/Controllers/FreeBattleControllerTests.cs
+++ b/SVSim.UnitTests/Controllers/FreeBattleControllerTests.cs
@@ -62,4 +62,35 @@ public class FreeBattleControllerTests
         Assert.That(data.GetProperty("node_server_url").GetString(), Is.EqualTo(""),
             "Empty string, not absent — Phase 2 fix pattern.");
     }
+
+    [Test]
+    public async Task DoMatching_unlimited_two_viewers_pair_PvP()
+    {
+        await using var factory = new SVSimTestFactory();
+        var v1 = await factory.SeedViewerAsync(steamId: 76_561_198_000_000_011UL, displayName: "Alice");
+        var v2 = await factory.SeedViewerAsync(steamId: 76_561_198_000_000_012UL, displayName: "Bob");
+        await factory.SeedGlobalsAsync();
+        await factory.SeedDeckAsync(v1, Format.Unlimited, 1);
+        await factory.SeedDeckAsync(v2, Format.Unlimited, 1);
+
+        // Alice polls first → parks.
+        var c1 = factory.CreateAuthenticatedClient(v1);
+        var r1 = await c1.PostAsJsonAsync("/unlimited_free_battle/do_matching", DoMatchingBody);
+        var j1 = JsonDocument.Parse(await r1.Content.ReadAsStringAsync()).RootElement;
+        Assert.That(j1.GetProperty("matching_state").GetInt32(), Is.EqualTo(3002));
+
+        // Bob polls — pairs, returns joiner (3004).
+        var c2 = factory.CreateAuthenticatedClient(v2);
+        var r2 = await c2.PostAsJsonAsync("/unlimited_free_battle/do_matching", DoMatchingBody);
+        var j2 = JsonDocument.Parse(await r2.Content.ReadAsStringAsync()).RootElement;
+        Assert.That(j2.GetProperty("matching_state").GetInt32(), Is.EqualTo(3004), "Joiner = 3004.");
+        Assert.That(j2.GetProperty("battle_id").GetString(), Is.Not.Null.And.Not.Empty);
+        Assert.That(j2.GetProperty("node_server_url").GetString(), Is.Not.Empty);
+
+        // Alice polls again — gets cached match, owner role (3007).
+        var r3 = await c1.PostAsJsonAsync("/unlimited_free_battle/do_matching", DoMatchingBody);
+        var j3 = JsonDocument.Parse(await r3.Content.ReadAsStringAsync()).RootElement;
+        Assert.That(j3.GetProperty("matching_state").GetInt32(), Is.EqualTo(3007), "Owner = 3007.");
+        Assert.That(j3.GetProperty("battle_id").GetString(), Is.EqualTo(j2.GetProperty("battle_id").GetString()));
+    }
 }