diff --git a/tests/GameCult.Caching.Tests/BackingStoreTests.cs b/tests/GameCult.Caching.Tests/BackingStoreTests.cs
index 86613c52..7e88c283 100644
--- a/tests/GameCult.Caching.Tests/BackingStoreTests.cs
+++ b/tests/GameCult.Caching.Tests/BackingStoreTests.cs
@@ -707,6 +707,7 @@ namespace GameCult.Caching.Tests
         }
 
         [Test]
+        [Platform("Win", Reason = "Holds an open FileShare.Read handle and expects a delete or replace to fail; Linux unlink and rename ignore open handles.")]
         public async Task DirectoryMessagePackBackingStore_Deletion_Commits_While_Locked_Old_Page_Remains_An_Orphan()
         {
             var filePath = Path.Combine(Path.GetTempPath(), $"cultlib-tests-{Guid.NewGuid():N}.cc");
diff --git a/tests/GameCult.Caching.Tests/DirectoryStoreDurabilityTests.cs b/tests/GameCult.Caching.Tests/DirectoryStoreDurabilityTests.cs
index 41ef46ad..840110bc 100644
--- a/tests/GameCult.Caching.Tests/DirectoryStoreDurabilityTests.cs
+++ b/tests/GameCult.Caching.Tests/DirectoryStoreDurabilityTests.cs
@@ -37,6 +37,7 @@ namespace GameCult.Caching.Tests
         }
 
         [Test]
+        [Platform("Win", Reason = "Holds an open FileShare.Read handle and expects a delete or replace to fail; Linux unlink and rename ignore open handles.")]
         public async Task FailedManifestReplaceKeepsPreviousGeneration()
         {
             using var cache = Open(out _);
diff --git a/tests/GameCult.Caching.Tests/StoreRoutingTests.cs b/tests/GameCult.Caching.Tests/StoreRoutingTests.cs
index fc99f01f..af7e7da7 100644
--- a/tests/GameCult.Caching.Tests/StoreRoutingTests.cs
+++ b/tests/GameCult.Caching.Tests/StoreRoutingTests.cs
@@ -439,6 +439,7 @@ namespace GameCult.Caching.Tests
         }
 
         [Test]
+        [Platform("Win", Reason = "Holds an open FileShare.Read handle and expects a delete or replace to fail; Linux unlink and rename ignore open handles.")]
         public void BatchIsAllOrNothingOnStoreFailure()
         {
             var registry = Registry();