diff --git a/analyzers/tests/SonarAnalyzer.UnitTest/TestCases/InfiniteRecursion.RoslynCfg.cs b/analyzers/tests/SonarAnalyzer.UnitTest/TestCases/InfiniteRecursion.RoslynCfg.cs
index ad2db0e1fe0..df346f536a3 100644
--- a/analyzers/tests/SonarAnalyzer.UnitTest/TestCases/InfiniteRecursion.RoslynCfg.cs
+++ b/analyzers/tests/SonarAnalyzer.UnitTest/TestCases/InfiniteRecursion.RoslynCfg.cs
@@ -600,3 +600,38 @@ public IEnumerable<T> Repeat<T>(T element)  // Noncompliant FP, it's not a recur
         }
     }
 }
+
+// https://github.com/SonarSource/sonar-dotnet/issues/6642
+public class Repro_6642
+{
+    public int this[int i]
+    {
+        get { return this[i]; } // FN
+        set { this[i] = value; } // FN
+    }
+}
+
+// https://github.com/SonarSource/sonar-dotnet/issues/6643
+public class Repro_6643
+{
+    public static implicit operator byte(Repro_6643 d) => d; // FN
+}
+
+// https://github.com/SonarSource/sonar-dotnet/issues/6644
+public delegate bool SomeDelegate();
+
+public class Repro_6644
+{
+    public event SomeDelegate SomeEvent
+    {
+        add
+        {
+            SomeEvent += value; // FN
+        }
+
+        remove
+        {
+            SomeEvent -= value; // FN
+        }
+    }
+}