diff --git a/src/libraries/Microsoft.Extensions.Caching.Memory/tests/MemoryCacheSetAndRemoveTests.cs b/src/libraries/Microsoft.Extensions.Caching.Memory/tests/MemoryCacheSetAndRemoveTests.cs
index 761fe4c3ab489..15ff4a158bd5f 100644
--- a/src/libraries/Microsoft.Extensions.Caching.Memory/tests/MemoryCacheSetAndRemoveTests.cs
+++ b/src/libraries/Microsoft.Extensions.Caching.Memory/tests/MemoryCacheSetAndRemoveTests.cs
@@ -543,6 +543,8 @@ public void SetGetAndRemoveWorksWithObjectKeysWhenDifferentReferences()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/72879")] // issue in cache
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/72890")] // issue in test
         public void GetAndSet_AreThreadSafe_AndUpdatesNeverLeavesNullValues()
         {
             var cache = CreateCache();
@@ -596,6 +598,7 @@ public void GetAndSet_AreThreadSafe_AndUpdatesNeverLeavesNullValues()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/72890")]
         public void OvercapacityPurge_AreThreadSafe()
         {
             var cache = new MemoryCache(new MemoryCacheOptions
@@ -661,6 +664,7 @@ public void OvercapacityPurge_AreThreadSafe()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/72890")]
         public void AddAndReplaceEntries_AreThreadSafe()
         {
             var cache = new MemoryCache(new MemoryCacheOptions