diff --git a/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/EventStreamTests.kt b/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/EventStreamTests.kt
index ae8996fdcbc..8366e238e14 100644
--- a/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/EventStreamTests.kt
+++ b/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/EventStreamTests.kt
@@ -198,6 +198,11 @@ extension EventStreamTestClient: EventStreamTestClientProtocol {
     /// - Parameter TestStreamOpInput : [no documentation found]
     ///
     /// - Returns: `TestStreamOpOutputResponse` : [no documentation found]
+    ///
+    /// - Throws: `TestStreamOpError` : Place-holder wrapper object for possible exceptions listed below.
+    ///
+    /// __Possible Exceptions:__
+    /// - `SomeError` : You don't have permission.
     public func testStreamOp(input: TestStreamOpInput) async throws -> TestStreamOpOutputResponse
     {
         let context = ClientRuntime.HttpContextBuilder()