diff --git a/src/Components/TestExplorer.fs b/src/Components/TestExplorer.fs
index a5d3305f..cba48dc1 100644
--- a/src/Components/TestExplorer.fs
+++ b/src/Components/TestExplorer.fs
@@ -1048,7 +1048,7 @@ module TestDiscovery =
             removed |> Array.map TestItem.getId |> Array.iter targetCollection.delete
 
             added
-            |> Array.filter (TestItem.getId >> isKnownDisplacedFragment)
+            |> Array.filter (TestItem.getId >> isKnownDisplacedFragment >> not)
             |> Array.iter targetCollection.add
 
             unchanged