diff --git a/tests/TarninaHub.Tests/Matchmaking/MatchmakingLlmTests.cs b/tests/TarninaHub.Tests/Matchmaking/MatchmakingLlmTests.cs
new file mode 100644
index 0000000..54a5c8b
--- /dev/null
+++ b/tests/TarninaHub.Tests/Matchmaking/MatchmakingLlmTests.cs
@@ -0,0 +1,78 @@
+using TarninaHub.Application.Matchmaking;
+using TarninaHub.Infrastructure.Llm;
+
+namespace TarninaHub.Tests.Matchmaking;
+
+public class MatchmakingLlmTests
+{
+    [Fact]
+    public void MatchScoring_ReturnsZeroWhenUnavailable()
+    {
+        Assert.Equal(0, MatchScoring.Combine(0.9, challengeMatch: true, locationMatch: true, available: false));
+    }
+
+    [Fact]
+    public void MatchScoring_AppliesContextBoostsAndClamps()
+    {
+        var baseScore = MatchScoring.Combine(0.5, challengeMatch: false, locationMatch: false, available: true);
+        var boosted = MatchScoring.Combine(0.5, challengeMatch: true, locationMatch: true, available: true);
+        var clamped = MatchScoring.Combine(0.98, challengeMatch: true, locationMatch: true, available: true);
+
+        Assert.Equal(0.5, baseScore, precision: 5);
+        Assert.Equal(0.65, boosted, precision: 5);
+        Assert.Equal(1.0, clamped, precision: 5);
+    }
+
+    [Fact]
+    public void RationaleBuilder_MentionsContextAndScore()
+    {
+        var strong = RationaleBuilder.Build(challengeMatch: true, locationMatch: true, score: 0.4);
+        var weak = RationaleBuilder.Build(challengeMatch: false, locationMatch: false, score: 0.1);
+
+        Assert.Contains("obszar", strong);
+        Assert.Contains("lokalizacja", strong);
+        Assert.Contains("wysoka", strong);
+        Assert.Contains("semantyczna", weak);
+    }
+
+    [Fact]
+    public void MatchPromptBuilder_IncludesProblemAndInnovation()
+    {
+        var prompt = MatchPromptBuilder.BuildExplanation(
+            "Brak miejsc spotkań",
+            "Seniorzy są samotni",
+            "social_challenge:seniorzy",
+            "Klub sąsiedzki",
+            "Miejsce spotkań",
+            "pilot",
+            0.42);
+
+        Assert.Contains("Brak miejsc spotkań", prompt.User);
+        Assert.Contains("Klub sąsiedzki", prompt.User);
+        Assert.Contains("pilot", prompt.User);
+        Assert.False(string.IsNullOrWhiteSpace(prompt.System));
+    }
+
+    [Fact]
+    public async Task NullLlmProvider_IsNotConfiguredAndReturnsNull()
+    {
+        var provider = new NullLlmProvider();
+
+        Assert.False(provider.IsConfigured);
+        Assert.Null(await provider.CompleteAsync("s", "u", CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task InMemoryLlmRequestLimiter_EnforcesWindow()
+    {
+        var limiter = new InMemoryLlmRequestLimiter(maxRequestsPerMinute: 2, window: TimeSpan.FromMilliseconds(60));
+
+        Assert.True(limiter.TryAcquire());
+        Assert.True(limiter.TryAcquire());
+        Assert.False(limiter.TryAcquire());
+
+        await Task.Delay(90);
+
+        Assert.True(limiter.TryAcquire());
+    }
+}