diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/AWSHttpBindingProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/AWSHttpBindingProtocolGenerator.kt
index 704664f02af..d57b3b6cdb2 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/AWSHttpBindingProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/AWSHttpBindingProtocolGenerator.kt
@@ -53,6 +53,7 @@ abstract class AWSHttpBindingProtocolGenerator : HttpBindingProtocolGenerator()
     val responseTestBuilder = HttpProtocolUnitTestResponseGenerator.Builder()
     val errorTestBuilder = HttpProtocolUnitTestErrorGenerator.Builder()
     open val testsToIgnore: Set<String> = setOf()
+    open val tagsToIgnore: Set<String> = setOf()
 
     override val shouldRenderDecodableBodyStructForInputShapes = true
     override val shouldRenderCodingKeysForEncodable = true
@@ -69,7 +70,8 @@ abstract class AWSHttpBindingProtocolGenerator : HttpBindingProtocolGenerator()
             getProtocolHttpBindingResolver(ctx, defaultContentType),
             serdeContext,
             imports,
-            testsToIgnore
+            testsToIgnore,
+            tagsToIgnore,
         ).generateProtocolTests() + renderEndpointsTests(ctx)
     }
 
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_0_ProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_0_ProtocolGenerator.kt
index b74b2f3f897..c68d8e2aa3e 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_0_ProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_0_ProtocolGenerator.kt
@@ -32,15 +32,16 @@ open class AwsJson1_0_ProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     override val httpResponseGenerator = HttpResponseGenerator(
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
-        AWSJsonHttpResponseBindingErrorGenerator()
+        AWSJsonHttpResponseBindingErrorGenerator(),
     )
     override val serdeContext = serdeContextJSON
     override val shouldRenderEncodableConformance: Boolean = true
     override val shouldRenderDecodableBodyStructForInputShapes: Boolean = true
     override val testsToIgnore = setOf(
         "SDKAppliedContentEncoding_awsJson1_0",
-        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsJson1_0"
+        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsJson1_0",
     )
+    override val tagsToIgnore = setOf("defaults")
     override fun getProtocolHttpBindingResolver(ctx: ProtocolGenerator.GenerationContext, defaultContentType: String):
         HttpBindingResolver = AwsJsonHttpBindingResolver(ctx, defaultContentType)
 
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_1_ProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_1_ProtocolGenerator.kt
index f46027ef00d..dee34af70e4 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_1_ProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsjson/AwsJson1_1_ProtocolGenerator.kt
@@ -32,15 +32,16 @@ class AwsJson1_1_ProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     override val httpResponseGenerator = HttpResponseGenerator(
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
-        AWSJsonHttpResponseBindingErrorGenerator()
+        AWSJsonHttpResponseBindingErrorGenerator(),
     )
     override val serdeContext = serdeContextJSON
     override val shouldRenderEncodableConformance: Boolean = true
     override val shouldRenderDecodableBodyStructForInputShapes: Boolean = true
     override val testsToIgnore = setOf(
         "SDKAppliedContentEncoding_awsJson1_1",
-        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsJson1_1"
+        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsJson1_1",
     )
+    override val tagsToIgnore = setOf("defaults")
     override fun getProtocolHttpBindingResolver(ctx: ProtocolGenerator.GenerationContext, defaultContentType: String):
         HttpBindingResolver = AwsJsonHttpBindingResolver(ctx, defaultContentType)
 
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AwsQueryProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AwsQueryProtocolGenerator.kt
index 60fc0e06b3b..ba8268c0e7f 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AwsQueryProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/awsquery/AwsQueryProtocolGenerator.kt
@@ -44,7 +44,7 @@ open class AwsQueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
         AWSRestXMLHttpResponseBindingErrorGenerator(),
-        AWSXMLHttpResponseBindingErrorInitGeneratorFactory()
+        AWSXMLHttpResponseBindingErrorInitGeneratorFactory(),
     )
 
     override val serdeContext = HttpProtocolUnitTestGenerator.SerdeContext("FormURLEncoder()", "XMLDecoder()")
@@ -56,8 +56,9 @@ open class AwsQueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     override val shouldRenderEncodableConformance = true
     override val testsToIgnore = setOf(
         "SDKAppliedContentEncoding_awsQuery",
-        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsQuery"
+        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_awsQuery",
     )
+    override val tagsToIgnore = setOf("defaults")
     override fun renderStructEncode(
         ctx: ProtocolGenerator.GenerationContext,
         shapeContainingMembers: Shape,
@@ -65,7 +66,7 @@ open class AwsQueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String?
+        path: String?,
     ) {
         val customizations = AwsQueryFormURLEncodeCustomizations()
         val encoder = StructEncodeFormURLGenerator(ctx, customizations, shapeContainingMembers, shapeMetadata, members, writer, defaultTimestampFormat)
@@ -78,7 +79,7 @@ open class AwsQueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String
+        path: String,
     ) {
         val decoder = AwsQueryStructDecodeXMLGenerator(ctx, members, shapeMetadata, writer, defaultTimestampFormat)
         decoder.render()
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/ec2query/Ec2QueryProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/ec2query/Ec2QueryProtocolGenerator.kt
index 92eee9046b2..737accb6d4f 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/ec2query/Ec2QueryProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/ec2query/Ec2QueryProtocolGenerator.kt
@@ -40,7 +40,7 @@ class Ec2QueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
         AWSEc2QueryHttpResponseBindingErrorGenerator(),
-        AWSEc2QueryHttpResponseBindingErrorInitGeneratorFactory()
+        AWSEc2QueryHttpResponseBindingErrorInitGeneratorFactory(),
     )
 
     override val serdeContext = HttpProtocolUnitTestGenerator.SerdeContext("FormURLEncoder()", "XMLDecoder()")
@@ -52,8 +52,9 @@ class Ec2QueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     override val shouldRenderEncodableConformance = true
     override val testsToIgnore = setOf(
         "SDKAppliedContentEncoding_ec2Query",
-        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_ec2Query"
+        "SDKAppendsGzipAndIgnoresHttpProvidedEncoding_ec2Query",
     )
+    override val tagsToIgnore = setOf("defaults")
     override fun renderStructEncode(
         ctx: ProtocolGenerator.GenerationContext,
         shapeContainingMembers: Shape,
@@ -61,7 +62,7 @@ class Ec2QueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String?
+        path: String?,
     ) {
         val customizations = Ec2QueryFormURLEncodeCustomizations()
         val encoder = StructEncodeFormURLGenerator(ctx, customizations, shapeContainingMembers, shapeMetadata, members, writer, defaultTimestampFormat)
@@ -74,7 +75,7 @@ class Ec2QueryProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String
+        path: String,
     ) {
         val decoder = StructDecodeXMLGenerator(ctx, members, mapOf(), writer, defaultTimestampFormat)
         decoder.render()
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restjson/AWSRestJson1ProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restjson/AWSRestJson1ProtocolGenerator.kt
index 2ae4d1c161c..5174e33eacb 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restjson/AWSRestJson1ProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restjson/AWSRestJson1ProtocolGenerator.kt
@@ -25,14 +25,15 @@ class AWSRestJson1ProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     override val httpResponseGenerator = HttpResponseGenerator(
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
-        AWSRestJson1HttpResponseBindingErrorGeneratable()
+        AWSRestJson1HttpResponseBindingErrorGeneratable(),
     )
     override val serdeContext = serdeContextJSON
     override val testsToIgnore = setOf(
         "SDKAppliedContentEncoding_restJson1",
         "SDKAppendedGzipAfterProvidedEncoding_restJson1",
-        "RestJsonHttpPayloadWithUnsetUnion"
+        "RestJsonHttpPayloadWithUnsetUnion",
     )
+    override val tagsToIgnore = setOf("defaults")
 
     override fun generateMessageMarshallable(ctx: ProtocolGenerator.GenerationContext) {
         var streamingShapes = outputStreamingShapes(ctx)
diff --git a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/RestXmlProtocolGenerator.kt b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/RestXmlProtocolGenerator.kt
index 63099cece3b..7e18cdf76e7 100644
--- a/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/RestXmlProtocolGenerator.kt
+++ b/codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/RestXmlProtocolGenerator.kt
@@ -31,7 +31,7 @@ class RestXmlProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         unknownServiceErrorSymbol,
         defaultTimestampFormat,
         AWSRestXMLHttpResponseBindingErrorGenerator(),
-        AWSXMLHttpResponseBindingErrorInitGeneratorFactory()
+        AWSXMLHttpResponseBindingErrorInitGeneratorFactory(),
     )
     override val shouldRenderDecodableBodyStructForInputShapes = false
     override val serdeContext = serdeContextXML
@@ -47,8 +47,9 @@ class RestXmlProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         "S3EscapePathObjectKeyInUriLabel",
         "SDKAppliedContentEncoding_restXml",
         "SDKAppendedGzipAfterProvidedEncoding_restXml",
-        "S3OperationNoErrorWrappingResponse"
+        "S3OperationNoErrorWrappingResponse",
     )
+    override val tagsToIgnore = setOf("defaults")
 
     override val codableProtocol = SwiftTypes.Protocols.Decodable
     override val encodableProtocol = null
@@ -61,7 +62,7 @@ class RestXmlProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String?
+        path: String?,
     ) {
         val encoder = StructEncodeXMLGenerator(ctx, shapeContainingMembers, members, writer)
         encoder.render()
@@ -73,7 +74,7 @@ class RestXmlProtocolGenerator : AWSHttpBindingProtocolGenerator() {
         members: List<MemberShape>,
         writer: SwiftWriter,
         defaultTimestampFormat: TimestampFormatTrait.Format,
-        path: String
+        path: String,
     ) {
         val decoder = RestXmlStructDecodeXMLGenerator(ctx, members, shapeMetadata, writer, defaultTimestampFormat)
         decoder.render()
diff --git a/gradle.properties b/gradle.properties
index f927f088d02..5bdc72faa84 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ kotlin.code.style=official
 org.gradle.jvmargs=-Xmx4096M
 
 # codegen
-smithyVersion=1.39.0
+smithyVersion=1.42.0
 smithyGradleVersion=0.6.0
 
 smithySwiftVersion = 0.1.0