diff --git a/src/core/Akka.Streams.Tests/Dsl/FlowDelaySpec.cs b/src/core/Akka.Streams.Tests/Dsl/FlowDelaySpec.cs
index f96cb3cbc1c..84841f8ca9c 100644
--- a/src/core/Akka.Streams.Tests/Dsl/FlowDelaySpec.cs
+++ b/src/core/Akka.Streams.Tests/Dsl/FlowDelaySpec.cs
@@ -99,7 +99,7 @@ public void A_Delay_must_deliver_elements_with_delay_for_slow_stream()
             }, Materializer);
         }
 
-        [Fact]
+        [Fact(Skip = "Racy")]
         public void A_Delay_must_drop_tail_for_internal_buffer_if_it_is_full_in_DropTail_mode()
         {
             this.AssertAllStagesStopped(() =>
@@ -117,7 +117,7 @@ public void A_Delay_must_drop_tail_for_internal_buffer_if_it_is_full_in_DropTail
             }, Materializer);
         }
 
-        [Fact]
+        [Fact(Skip = "Racy")]
         public void A_Delay_must_drop_head_for_internal_buffer_if_it_is_full_in_DropHead_mode()
         {
             this.AssertAllStagesStopped(() =>
@@ -133,7 +133,7 @@ public void A_Delay_must_drop_head_for_internal_buffer_if_it_is_full_in_DropHead
             }, Materializer);
         }
 
-        [Fact]
+        [Fact(Skip = "Racy")]
         public void A_Delay_must_clear_all_for_internal_buffer_if_it_is_full_in_DropBuffer_mode()
         {
             this.AssertAllStagesStopped(() =>