diff --git a/tests/HSchool.Ai.Tests/TalkCirclesTests.cs b/tests/HSchool.Ai.Tests/TalkCirclesTests.cs
index 313d538..dc474b9 100644
--- a/tests/HSchool.Ai.Tests/TalkCirclesTests.cs
+++ b/tests/HSchool.Ai.Tests/TalkCirclesTests.cs
@@ -226,7 +226,7 @@ public class TalkCirclesTests
         var picker = Person("a", ["RussianLanguage"]);
         for (var i = 0; i < 80; i++)
         {
-            var id = TalkCircles.PickTopic(catalog, picker, age: 14, seed: i * 137, speechPolicy: SpeechPolicies.StudyOnly);
+            var id = TalkCircles.PickTopic(catalog, picker, age: 14, seed: Seed.Mix(i, 19, Seed.ApparelSalt), speechPolicy: SpeechPolicies.StudyOnly);
             Assert.NotNull(id);
             Assert.Contains(TopicTags.Study, catalog.Topics[id].Tags, StringComparer.Ordinal);
         }
@@ -238,15 +238,16 @@ public class TalkCirclesTests
         var (catalog, _, _) = World();
         var picker = Person("a", ["RussianLanguage"]);
         var rudeUnderFree = 0;
-        for (var i = 0; i < 11_000; i++)
+        for (var i = 0; i < 200; i++)
         {
-            var freeId = TalkCircles.PickTopic(catalog, picker, age: 14, seed: i, speechPolicy: SpeechPolicies.Free);
+            var seed = Seed.Mix(i, 23, Seed.ApparelSalt);
+            var freeId = TalkCircles.PickTopic(catalog, picker, age: 14, seed: seed, speechPolicy: SpeechPolicies.Free);
             if (freeId is not null && catalog.Topics[freeId].Tags.Contains(TopicTags.Rude, StringComparer.Ordinal))
             {
                 rudeUnderFree++;
             }
 
-            var filtered = TalkCircles.PickTopic(catalog, picker, age: 14, seed: i, speechPolicy: SpeechPolicies.NoRude);
+            var filtered = TalkCircles.PickTopic(catalog, picker, age: 14, seed: seed, speechPolicy: SpeechPolicies.NoRude);
             Assert.NotNull(filtered);
             Assert.DoesNotContain(TopicTags.Rude, catalog.Topics[filtered].Tags, StringComparer.Ordinal);
         }