diff --git a/src/Core/Components/MessageBar/FluentMessageBar.razor.cs b/src/Core/Components/MessageBar/FluentMessageBar.razor.cs
index 81a8644639..4c93cf1245 100644
--- a/src/Core/Components/MessageBar/FluentMessageBar.razor.cs
+++ b/src/Core/Components/MessageBar/FluentMessageBar.razor.cs
@@ -19,7 +19,6 @@ public partial class FluentMessageBar : FluentComponentBase, IDisposable
///
protected string? ClassValue => new CssBuilder(Class)
.AddClass("fluent-messagebar", () => Type == MessageType.MessageBar)
- .AddClass("fluent-messagebar-animation", () => FadeIn)
.AddClass("dark", () => GlobalState.Luminance == StandardLuminance.DarkMode)
.AddClass("fluent-messagebar-notification", () => Type == MessageType.Notification)
.AddClass("intent-info", () => Intent == MessageIntent.Info)
diff --git a/src/Core/Components/MessageBar/FluentMessageBar.razor.css b/src/Core/Components/MessageBar/FluentMessageBar.razor.css
index f122900529..89eee7aed8 100644
--- a/src/Core/Components/MessageBar/FluentMessageBar.razor.css
+++ b/src/Core/Components/MessageBar/FluentMessageBar.razor.css
@@ -15,7 +15,7 @@
column-gap: 8px;
}
-.fluent-messagebar-animation {
+.fluent-messagebar[animation="fadein"] {
animation: fadein 1.5s;
}
diff --git a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_AllowDismiss.verified.html b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_AllowDismiss.verified.html
index 7319077b63..0bc530cbaa 100644
--- a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_AllowDismiss.verified.html
+++ b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_AllowDismiss.verified.html
@@ -1,5 +1,5 @@
-
+
info
diff --git a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_Default.verified.html b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_Default.verified.html
index 4f3696b344..5a874f9805 100644
--- a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_Default.verified.html
+++ b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_Default.verified.html
@@ -1,5 +1,5 @@
-
+
info
diff --git a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_WithId.verified.html b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_WithId.verified.html
index 91b4e5eb1f..36984a80b7 100644
--- a/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_WithId.verified.html
+++ b/tests/Core/MessageBar/FluentMessageBarTests.FluentMessageBar_WithId.verified.html
@@ -1,4 +1,4 @@
-
+
info
diff --git a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync1.verified.razor.html b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync1.verified.razor.html
index 53381f021d..4c6ad1cf9d 100644
--- a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync1.verified.razor.html
+++ b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync1.verified.razor.html
@@ -1,6 +1,6 @@
-
+
info
diff --git a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync2.verified.razor.html b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync2.verified.razor.html
index b433855376..ca1ad5c1b9 100644
--- a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync2.verified.razor.html
+++ b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync2.verified.razor.html
@@ -1,6 +1,6 @@
-
+
warning
diff --git a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync3.verified.razor.html b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync3.verified.razor.html
index b433855376..ca1ad5c1b9 100644
--- a/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync3.verified.razor.html
+++ b/tests/Core/MessageBar/MessageServiceTests.FluentMessageBarService_AllowDismissAsync3.verified.razor.html
@@ -1,6 +1,6 @@