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 6686aa67c34..a25867c8d0b 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
@@ -193,6 +193,16 @@ extension EventStreamTestClientTypes.TestStream: ClientRuntime.MessageUnmarshall
         val contents = getFileContents(context.manifest, "/Example/EventStreamTestClient.swift")
         var expected = """
 extension EventStreamTestClient: EventStreamTestClientProtocol {
+    /// This operation is cool.
+    ///
+    /// - Parameter TestStreamOpInput : [no documentation found]
+    ///
+    /// - Returns: `TestStreamOpOutputResponse` : [no documentation found]
+    ///
+    /// - Throws: One of the exceptions listed below __Possible Exceptions__.
+    ///
+    /// __Possible Exceptions:__
+    /// - `SomeError` : You don't have permission.
     public func testStreamOp(input: TestStreamOpInput) async throws -> TestStreamOpOutputResponse
     {
         let context = ClientRuntime.HttpContextBuilder()
diff --git a/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AWSQueryOperationStackTest.kt b/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AWSQueryOperationStackTest.kt
index 094674fcaa1..a77a673458e 100644
--- a/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AWSQueryOperationStackTest.kt
+++ b/codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AWSQueryOperationStackTest.kt
@@ -22,6 +22,11 @@ class AWSQueryOperationStackTest {
         val expectedContents =
             """
 extension QueryProtocolClient: QueryProtocolClientProtocol {
+    /// This is a very cool operation.
+    ///
+    /// - Parameter NoInputAndOutputInput : [no documentation found]
+    ///
+    /// - Returns: `NoInputAndOutputOutputResponse` : [no documentation found]
     public func noInputAndOutput(input: NoInputAndOutputInput) async throws -> NoInputAndOutputOutputResponse
     {
         let context = ClientRuntime.HttpContextBuilder()
diff --git a/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/awsquery/query-empty-input-output.smithy b/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/awsquery/query-empty-input-output.smithy
index b59dcf51375..b07f2f43b99 100644
--- a/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/awsquery/query-empty-input-output.smithy
+++ b/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/awsquery/query-empty-input-output.smithy
@@ -17,6 +17,7 @@ service AwsQuery {
     ]
 }
 
+@documentation("This is a very cool operation.")
 operation NoInputAndOutput {
     input: NoInputAndOutputInput,
     output: NoInputAndOutputOutput
diff --git a/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/eventstream.smithy b/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/eventstream.smithy
index 7f467fe64a2..c153874b5c0 100644
--- a/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/eventstream.smithy
+++ b/codegen/smithy-aws-swift-codegen/src/test/resources/software.amazon.smithy.aws.swift.codegen/eventstream.smithy
@@ -9,6 +9,7 @@ use aws.auth#sigv4
 @service(sdkId: "EventStreamTest")
 service TestService { version: "123", operations: [TestStreamOp] }
 
+@documentation("This operation is cool.")
 @http(method: "POST", uri: "/test")
 operation TestStreamOp {
     input: TestStreamInputOutput,
@@ -22,6 +23,7 @@ structure TestStreamInputOutput {
     value: TestStream
 }
 
+@documentation("You don't have permission.")
 @error("client")
 structure SomeError {
     Message: String,