diff --git a/typespec-extension/changelog.md b/typespec-extension/changelog.md
index b075d154d5..30ca4a5c52 100644
--- a/typespec-extension/changelog.md
+++ b/typespec-extension/changelog.md
@@ -1,5 +1,13 @@
 # Release History
 
+## 0.18.0 (2024-07-10)
+
+Compatible with compiler 0.57.
+
+### Breaking Changes
+
+- Request body without `@body` or `@bodyRoot`: the properties of the request body is flattened into method signature.
+
 ## 0.17.1 (2024-07-03)
 
 Compatible with compiler 0.57.
diff --git a/typespec-extension/package-lock.json b/typespec-extension/package-lock.json
index 748e98756b..c9d704f816 100644
--- a/typespec-extension/package-lock.json
+++ b/typespec-extension/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@azure-tools/typespec-java",
-  "version": "0.17.1",
+  "version": "0.18.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@azure-tools/typespec-java",
-      "version": "0.17.1",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
         "@autorest/codemodel": "~4.20.0",
@@ -18,26 +18,26 @@
         "@azure-tools/typespec-azure-core": "0.43.0",
         "@azure-tools/typespec-azure-resource-manager": "0.43.0",
         "@azure-tools/typespec-azure-rulesets": "0.43.0",
-        "@azure-tools/typespec-client-generator-core": "0.43.1",
+        "@azure-tools/typespec-client-generator-core": "0.43.2",
         "@types/js-yaml": "~4.0.9",
-        "@types/lodash": "~4.17.1",
-        "@types/mocha": "~10.0.6",
-        "@types/node": "~20.12.10",
-        "@typescript-eslint/eslint-plugin": "~7.8.0",
-        "@typescript-eslint/parser": "~7.8.0",
+        "@types/lodash": "~4.17.6",
+        "@types/mocha": "~10.0.7",
+        "@types/node": "~20.14.10",
+        "@typescript-eslint/eslint-plugin": "~7.16.0",
+        "@typescript-eslint/parser": "~7.16.0",
         "@typespec/compiler": "0.57.0",
         "@typespec/http": "0.57.0",
         "@typespec/openapi": "0.57.0",
         "@typespec/rest": "0.57.0",
         "@typespec/versioning": "0.57.0",
         "@typespec/xml": "0.57.0",
-        "c8": "~9.1.0",
+        "c8": "~10.1.2",
         "eslint": "~8.57.0",
-        "eslint-plugin-deprecation": "~2.0.0",
-        "mocha": "~10.4.0",
-        "prettier": "~3.2.5",
-        "rimraf": "~5.0.5",
-        "typescript": "~5.4.5"
+        "eslint-plugin-deprecation": "~3.0.0",
+        "mocha": "~10.6.0",
+        "prettier": "~3.3.2",
+        "rimraf": "~6.0.0",
+        "typescript": "~5.5.3"
       },
       "engines": {
         "node": ">=14.0.0"
@@ -47,7 +47,7 @@
         "@azure-tools/typespec-azure-core": ">=0.43.0 <1.0.0",
         "@azure-tools/typespec-azure-resource-manager": ">=0.43.0 <1.0.0",
         "@azure-tools/typespec-azure-rulesets": ">=0.43.0 <1.0.0",
-        "@azure-tools/typespec-client-generator-core": ">=0.43.1 <1.0.0",
+        "@azure-tools/typespec-client-generator-core": ">=0.43.2 <1.0.0",
         "@typespec/compiler": ">=0.57.0 <1.0.0",
         "@typespec/http": ">=0.57.0 <1.0.0",
         "@typespec/openapi": ">=0.57.0 <1.0.0",
@@ -190,9 +190,9 @@
       }
     },
     "node_modules/@azure-tools/typespec-client-generator-core": {
-      "version": "0.43.1",
-      "resolved": "https://registry.npmjs.org/@azure-tools/typespec-client-generator-core/-/typespec-client-generator-core-0.43.1.tgz",
-      "integrity": "sha512-NwNN/fIOcjOU/8o6ViCuEAAQl6zmu2X1QKPuXxeSy8ssDwrTiX9Ho2X/7IZM4XmOArKTtgmTkNcSnnmuj5dsGg==",
+      "version": "0.43.2",
+      "resolved": "https://registry.npmjs.org/@azure-tools/typespec-client-generator-core/-/typespec-client-generator-core-0.43.2.tgz",
+      "integrity": "sha512-UAVV30BtTQBiXmBoQ3SyvmiuBDYoqWFIn7G96hjojpwXpE6D5ba0y5LascMuF1b65eAhGnnf974DElJE9DGepQ==",
       "dev": true,
       "dependencies": {
         "change-case": "~5.4.4",
@@ -206,8 +206,7 @@
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         "@typespec/http": "~0.57.0",
         "@typespec/rest": "~0.57.0",
-        "@typespec/versioning": "~0.57.0",
-        "@typespec/xml": "~0.57.0"
+        "@typespec/versioning": "~0.57.0"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -563,55 +562,41 @@
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-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
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+      "version": "4.17.6",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.6.tgz",
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     "node_modules/@typescript-eslint/eslint-plugin": {
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+      "version": "7.16.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-7.16.0.tgz",
+      "integrity": "sha512-py1miT6iQpJcs1BiJjm54AMzeuMPBSPuKPlnT8HlfudbcS5rYeX5jajpLf3mrdRh9dA/Ec2FVUY0ifeVNDIhZw==",
       "dev": true,
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-        "@typescript-eslint/scope-manager": "7.8.0",
-        "@typescript-eslint/type-utils": "7.8.0",
-        "@typescript-eslint/utils": "7.8.0",
-        "@typescript-eslint/visitor-keys": "7.8.0",
-        "debug": "^4.3.4",
+        "@typescript-eslint/scope-manager": "7.16.0",
+        "@typescript-eslint/type-utils": "7.16.0",
+        "@typescript-eslint/utils": "7.16.0",
+        "@typescript-eslint/visitor-keys": "7.16.0",
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         "ignore": "^5.3.1",
         "natural-compare": "^1.4.0",
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@@ -631,140 +616,16 @@
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-      "dev": true
-    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -3521,9 +3252,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
-      "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "version": "5.5.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.3.tgz",
+      "integrity": "sha512-/hreyEujaB0w76zKo6717l3L0o/qEUtRgdvUBvlkhoWeOVMjMuHNHk0BRBzikzuGDqNmPQbg5ifMEqsHLiIUcQ==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -3633,9 +3364,9 @@
       }
     },
     "node_modules/workerpool": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.1.tgz",
-      "integrity": "sha512-ILEIE97kDZvF9Wb9f6h5aXK4swSlKGUcOEGiIYb2OOu/IrDU9iwj0fD//SsA6E5ibwJxpEvhullJY4Sl4GcpAw==",
+      "version": "6.5.1",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.5.1.tgz",
+      "integrity": "sha512-Fs4dNYcsdpYSAfVxhnl1L5zTksjvOJxtC5hzMNl+1t9B8hTJTdKDyZ5ju7ztgPy+ft9tBFXoOlDNiOT9WUXZlA==",
       "dev": true
     },
     "node_modules/wrap-ansi": {
diff --git a/typespec-extension/package.json b/typespec-extension/package.json
index 66b6e21caa..271faa3fdd 100644
--- a/typespec-extension/package.json
+++ b/typespec-extension/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@azure-tools/typespec-java",
-  "version": "0.17.1",
+  "version": "0.18.0",
   "description": "TypeSpec library for emitting Java client from the TypeSpec REST protocol binding",
   "keywords": [
     "TypeSpec"
@@ -49,7 +49,7 @@
     "@azure-tools/typespec-azure-resource-manager": ">=0.43.0 <1.0.0",
     "@azure-tools/typespec-autorest": ">=0.43.0 <1.0.0",
     "@azure-tools/typespec-azure-rulesets": ">=0.43.0 <1.0.0",
-    "@azure-tools/typespec-client-generator-core": ">=0.43.1 <1.0.0",
+    "@azure-tools/typespec-client-generator-core": ">=0.43.2 <1.0.0",
     "@typespec/compiler": ">=0.57.0 <1.0.0",
     "@typespec/http": ">=0.57.0 <1.0.0",
     "@typespec/openapi": ">=0.57.0 <1.0.0",
@@ -67,25 +67,25 @@
     "@azure-tools/typespec-azure-resource-manager": "0.43.0",
     "@azure-tools/typespec-autorest": "0.43.0",
     "@azure-tools/typespec-azure-rulesets": "0.43.0",
-    "@azure-tools/typespec-client-generator-core": "0.43.1",
+    "@azure-tools/typespec-client-generator-core": "0.43.2",
     "@types/js-yaml": "~4.0.9",
-    "@types/lodash": "~4.17.1",
-    "@types/mocha": "~10.0.6",
-    "@types/node": "~20.12.10",
-    "@typescript-eslint/eslint-plugin": "~7.8.0",
-    "@typescript-eslint/parser": "~7.8.0",
+    "@types/lodash": "~4.17.6",
+    "@types/mocha": "~10.0.7",
+    "@types/node": "~20.14.10",
+    "@typescript-eslint/eslint-plugin": "~7.16.0",
+    "@typescript-eslint/parser": "~7.16.0",
     "@typespec/compiler": "0.57.0",
     "@typespec/http": "0.57.0",
     "@typespec/openapi": "0.57.0",
     "@typespec/rest": "0.57.0",
     "@typespec/versioning": "0.57.0",
     "@typespec/xml": "0.57.0",
-    "c8": "~9.1.0",
+    "c8": "~10.1.2",
     "eslint": "~8.57.0",
-    "eslint-plugin-deprecation": "~2.0.0",
-    "mocha": "~10.4.0",
-    "prettier": "~3.2.5",
-    "rimraf": "~5.0.5",
-    "typescript": "~5.4.5"
+    "eslint-plugin-deprecation": "~3.0.0",
+    "mocha": "~10.6.0",
+    "prettier": "~3.3.2",
+    "rimraf": "~6.0.0",
+    "typescript": "~5.5.3"
   }
 }
diff --git a/typespec-extension/src/code-model-builder.ts b/typespec-extension/src/code-model-builder.ts
index f9d270698d..eb13b150a7 100644
--- a/typespec-extension/src/code-model-builder.ts
+++ b/typespec-extension/src/code-model-builder.ts
@@ -801,7 +801,7 @@ export class CodeModelBuilder {
           this.processParameterBody(codeModelOperation, op, op.parameters.body.property);
         }
       } else if (op.parameters.body.type) {
-        let bodyType = this.getEffectiveSchemaType(op.parameters.body.type);
+        let bodyType = op.parameters.body.type;
 
         if (bodyType.kind === "Model") {
           // try use resource type as round-trip model
@@ -1345,7 +1345,11 @@ export class CodeModelBuilder {
       schema = this.processSchemaFromSdkType(sdkType, body.name);
     }
 
-    const isAnonymousModel = sdkType.kind === "model" && sdkType.isGeneratedName === true;
+    // Explicit body parameter @body or @bodyRoot would result to body.kind === "ModelProperty"
+    // Implicit body parameter would result to body.kind === "Model"
+    // see https://typespec.io/docs/libraries/http/cheat-sheet#data-types
+    const bodyParameterFlatten = sdkType.kind === "model" && body.kind === "Model" && !this.isArm();
+
     const parameterName = body.kind === "Model" ? (sdkType.kind === "model" ? sdkType.name : "") : this.getName(body);
     const parameter = new Parameter(parameterName, this.getDoc(body), schema, {
       summary: this.getSummary(body),
@@ -1371,8 +1375,8 @@ export class CodeModelBuilder {
       this.trackSchemaUsage(schema, { serializationFormats: [KnownMediaType.Multipart] });
     }
 
-    if (schema instanceof ObjectSchema && isAnonymousModel) {
-      // anonymous model
+    if (schema instanceof ObjectSchema && bodyParameterFlatten) {
+      // flatten body parameter
 
       // name the schema for documentation
       schema.language.default.name = pascalCase(op.language.default.name) + "Request";
diff --git a/typespec-tests/package.json b/typespec-tests/package.json
index 316046f1f1..7e3f396430 100644
--- a/typespec-tests/package.json
+++ b/typespec-tests/package.json
@@ -10,12 +10,12 @@
   },
   "dependencies": {
     "@azure-tools/cadl-ranch-specs": "0.34.3",
-    "@azure-tools/typespec-java": "file:/../typespec-extension/azure-tools-typespec-java-0.17.1.tgz"
+    "@azure-tools/typespec-java": "file:/../typespec-extension/azure-tools-typespec-java-0.18.0.tgz"
   },
   "devDependencies": {
     "@typespec/prettier-plugin-typespec": "~0.57.0",
-    "prettier-plugin-organize-imports": "3.2.4",
-    "prettier": "~3.2.5"
+    "prettier-plugin-organize-imports": "4.0.0",
+    "prettier": "~3.3.2"
   },
   "overrides": {
     "@typespec/compiler": ">=0.57.0 <1.0.0",
@@ -25,7 +25,7 @@
     "@typespec/openapi": ">=0.57.0 <1.0.0",
     "@typespec/xml": ">=0.57.0 <1.0.0",
     "@azure-tools/typespec-azure-core": ">=0.43.0 <1.0.0",
-    "@azure-tools/typespec-client-generator-core": ">=0.43.1 <1.0.0",
+    "@azure-tools/typespec-client-generator-core": "0.43.2",
     "@azure-tools/typespec-azure-resource-manager": ">=0.43.0 <1.0.0",
     "@azure-tools/typespec-autorest": ">=0.43.0 <1.0.0"
   },
diff --git a/typespec-tests/src/main/java/com/client/naming/ModelAsyncClient.java b/typespec-tests/src/main/java/com/client/naming/ClientModelAsyncClient.java
similarity index 95%
rename from typespec-tests/src/main/java/com/client/naming/ModelAsyncClient.java
rename to typespec-tests/src/main/java/com/client/naming/ClientModelAsyncClient.java
index 4a780a726b..ad6a0fe3df 100644
--- a/typespec-tests/src/main/java/com/client/naming/ModelAsyncClient.java
+++ b/typespec-tests/src/main/java/com/client/naming/ClientModelAsyncClient.java
@@ -16,7 +16,7 @@
 import com.azure.core.http.rest.Response;
 import com.azure.core.util.BinaryData;
 import com.azure.core.util.FluxUtil;
-import com.client.naming.implementation.ModelsImpl;
+import com.client.naming.implementation.ClientModelsImpl;
 import com.client.naming.models.ClientModel;
 import com.client.naming.models.JavaModel;
 import reactor.core.publisher.Mono;
@@ -25,17 +25,17 @@
  * Initializes a new instance of the asynchronous NamingClient type.
  */
 @ServiceClient(builder = NamingClientBuilder.class, isAsync = true)
-public final class ModelAsyncClient {
+public final class ClientModelAsyncClient {
     @Generated
-    private final ModelsImpl serviceClient;
+    private final ClientModelsImpl serviceClient;
 
     /**
-     * Initializes an instance of ModelAsyncClient class.
+     * Initializes an instance of ClientModelAsyncClient class.
      * 
      * @param serviceClient the service client implementation.
      */
     @Generated
-    ModelAsyncClient(ModelsImpl serviceClient) {
+    ClientModelAsyncClient(ClientModelsImpl serviceClient) {
         this.serviceClient = serviceClient;
     }
 
diff --git a/typespec-tests/src/main/java/com/client/naming/ModelClient.java b/typespec-tests/src/main/java/com/client/naming/ClientModelClient.java
similarity index 95%
rename from typespec-tests/src/main/java/com/client/naming/ModelClient.java
rename to typespec-tests/src/main/java/com/client/naming/ClientModelClient.java
index dd1a3e5da0..4417a4d8fa 100644
--- a/typespec-tests/src/main/java/com/client/naming/ModelClient.java
+++ b/typespec-tests/src/main/java/com/client/naming/ClientModelClient.java
@@ -15,7 +15,7 @@
 import com.azure.core.http.rest.RequestOptions;
 import com.azure.core.http.rest.Response;
 import com.azure.core.util.BinaryData;
-import com.client.naming.implementation.ModelsImpl;
+import com.client.naming.implementation.ClientModelsImpl;
 import com.client.naming.models.ClientModel;
 import com.client.naming.models.JavaModel;
 
@@ -23,17 +23,17 @@
  * Initializes a new instance of the synchronous NamingClient type.
  */
 @ServiceClient(builder = NamingClientBuilder.class)
-public final class ModelClient {
+public final class ClientModelClient {
     @Generated
-    private final ModelsImpl serviceClient;
+    private final ClientModelsImpl serviceClient;
 
     /**
-     * Initializes an instance of ModelClient class.
+     * Initializes an instance of ClientModelClient class.
      * 
      * @param serviceClient the service client implementation.
      */
     @Generated
-    ModelClient(ModelsImpl serviceClient) {
+    ClientModelClient(ClientModelsImpl serviceClient) {
         this.serviceClient = serviceClient;
     }
 
diff --git a/typespec-tests/src/main/java/com/client/naming/NamingClientBuilder.java b/typespec-tests/src/main/java/com/client/naming/NamingClientBuilder.java
index 3fcf4562d5..dfeb2c86c9 100644
--- a/typespec-tests/src/main/java/com/client/naming/NamingClientBuilder.java
+++ b/typespec-tests/src/main/java/com/client/naming/NamingClientBuilder.java
@@ -42,10 +42,10 @@
 @ServiceClientBuilder(
     serviceClients = {
         NamingClient.class,
-        ModelClient.class,
+        ClientModelClient.class,
         UnionEnumClient.class,
         NamingAsyncClient.class,
-        ModelAsyncClient.class,
+        ClientModelAsyncClient.class,
         UnionEnumAsyncClient.class })
 public final class NamingClientBuilder
     implements HttpTrait<NamingClientBuilder>, ConfigurationTrait<NamingClientBuilder> {
@@ -262,13 +262,13 @@ public NamingAsyncClient buildAsyncClient() {
     }
 
     /**
-     * Builds an instance of ModelAsyncClient class.
+     * Builds an instance of ClientModelAsyncClient class.
      * 
-     * @return an instance of ModelAsyncClient.
+     * @return an instance of ClientModelAsyncClient.
      */
     @Generated
-    public ModelAsyncClient buildModelAsyncClient() {
-        return new ModelAsyncClient(buildInnerClient().getModels());
+    public ClientModelAsyncClient buildClientModelAsyncClient() {
+        return new ClientModelAsyncClient(buildInnerClient().getClientModels());
     }
 
     /**
@@ -292,13 +292,13 @@ public NamingClient buildClient() {
     }
 
     /**
-     * Builds an instance of ModelClient class.
+     * Builds an instance of ClientModelClient class.
      * 
-     * @return an instance of ModelClient.
+     * @return an instance of ClientModelClient.
      */
     @Generated
-    public ModelClient buildModelClient() {
-        return new ModelClient(buildInnerClient().getModels());
+    public ClientModelClient buildClientModelClient() {
+        return new ClientModelClient(buildInnerClient().getClientModels());
     }
 
     /**
diff --git a/typespec-tests/src/main/java/com/client/naming/implementation/ModelsImpl.java b/typespec-tests/src/main/java/com/client/naming/implementation/ClientModelsImpl.java
similarity index 93%
rename from typespec-tests/src/main/java/com/client/naming/implementation/ModelsImpl.java
rename to typespec-tests/src/main/java/com/client/naming/implementation/ClientModelsImpl.java
index 458cb797a6..a1cf0ec689 100644
--- a/typespec-tests/src/main/java/com/client/naming/implementation/ModelsImpl.java
+++ b/typespec-tests/src/main/java/com/client/naming/implementation/ClientModelsImpl.java
@@ -26,13 +26,13 @@
 import reactor.core.publisher.Mono;
 
 /**
- * An instance of this class provides access to all the operations defined in Models.
+ * An instance of this class provides access to all the operations defined in ClientModels.
  */
-public final class ModelsImpl {
+public final class ClientModelsImpl {
     /**
      * The proxy service used to perform REST calls.
      */
-    private final ModelsService service;
+    private final ClientModelsService service;
 
     /**
      * The service client containing this operation class.
@@ -40,22 +40,23 @@ public final class ModelsImpl {
     private final NamingClientImpl client;
 
     /**
-     * Initializes an instance of ModelsImpl.
+     * Initializes an instance of ClientModelsImpl.
      * 
      * @param client the instance of the service client containing this operation class.
      */
-    ModelsImpl(NamingClientImpl client) {
-        this.service = RestProxy.create(ModelsService.class, client.getHttpPipeline(), client.getSerializerAdapter());
+    ClientModelsImpl(NamingClientImpl client) {
+        this.service
+            = RestProxy.create(ClientModelsService.class, client.getHttpPipeline(), client.getSerializerAdapter());
         this.client = client;
     }
 
     /**
-     * The interface defining all the services for NamingClientModels to be used by the proxy service to perform REST
-     * calls.
+     * The interface defining all the services for NamingClientClientModels to be used by the proxy service to perform
+     * REST calls.
      */
     @Host("http://localhost:3000")
-    @ServiceInterface(name = "NamingClientModels")
-    public interface ModelsService {
+    @ServiceInterface(name = "NamingClientClientMo")
+    public interface ClientModelsService {
         @Post("/client/naming/model/client")
         @ExpectedResponses({ 204 })
         @UnexpectedResponseExceptionType(value = ClientAuthenticationException.class, code = { 401 })
diff --git a/typespec-tests/src/main/java/com/client/naming/implementation/NamingClientImpl.java b/typespec-tests/src/main/java/com/client/naming/implementation/NamingClientImpl.java
index e724ef048a..b302925913 100644
--- a/typespec-tests/src/main/java/com/client/naming/implementation/NamingClientImpl.java
+++ b/typespec-tests/src/main/java/com/client/naming/implementation/NamingClientImpl.java
@@ -71,17 +71,17 @@ public SerializerAdapter getSerializerAdapter() {
     }
 
     /**
-     * The ModelsImpl object to access its operations.
+     * The ClientModelsImpl object to access its operations.
      */
-    private final ModelsImpl models;
+    private final ClientModelsImpl clientModels;
 
     /**
-     * Gets the ModelsImpl object to access its operations.
+     * Gets the ClientModelsImpl object to access its operations.
      * 
-     * @return the ModelsImpl object.
+     * @return the ClientModelsImpl object.
      */
-    public ModelsImpl getModels() {
-        return this.models;
+    public ClientModelsImpl getClientModels() {
+        return this.clientModels;
     }
 
     /**
@@ -124,7 +124,7 @@ public NamingClientImpl(HttpPipeline httpPipeline) {
     public NamingClientImpl(HttpPipeline httpPipeline, SerializerAdapter serializerAdapter) {
         this.httpPipeline = httpPipeline;
         this.serializerAdapter = serializerAdapter;
-        this.models = new ModelsImpl(this);
+        this.clientModels = new ClientModelsImpl(this);
         this.unionEnums = new UnionEnumsImpl(this);
         this.service = RestProxy.create(NamingClientService.class, this.httpPipeline, this.getSerializerAdapter());
     }
diff --git a/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityAsyncClient.java b/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityAsyncClient.java
index 09c2f47754..f06a21f593 100644
--- a/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityAsyncClient.java
+++ b/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityAsyncClient.java
@@ -17,6 +17,7 @@
 import com.azure.core.util.BinaryData;
 import com.azure.core.util.FluxUtil;
 import com.parameters.bodyoptionality.implementation.BodyOptionalityClientImpl;
+import com.parameters.bodyoptionality.implementation.models.RequiredImplicitRequest;
 import com.parameters.bodyoptionality.models.BodyModel;
 import reactor.core.publisher.Mono;
 
@@ -72,7 +73,7 @@ public Mono<Response<Void>> requiredExplicitWithResponse(BinaryData body, Reques
      * }
      * }</pre>
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param requiredImplicitRequest The requiredImplicitRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -82,8 +83,9 @@ public Mono<Response<Void>> requiredExplicitWithResponse(BinaryData body, Reques
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Response<Void>> requiredImplicitWithResponse(BinaryData bodyModel, RequestOptions requestOptions) {
-        return this.serviceClient.requiredImplicitWithResponseAsync(bodyModel, requestOptions);
+    public Mono<Response<Void>> requiredImplicitWithResponse(BinaryData requiredImplicitRequest,
+        RequestOptions requestOptions) {
+        return this.serviceClient.requiredImplicitWithResponseAsync(requiredImplicitRequest, requestOptions);
     }
 
     /**
@@ -109,7 +111,7 @@ public Mono<Void> requiredExplicit(BodyModel body) {
     /**
      * The requiredImplicit operation.
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param name The name parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -120,9 +122,11 @@ public Mono<Void> requiredExplicit(BodyModel body) {
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Void> requiredImplicit(BodyModel bodyModel) {
+    public Mono<Void> requiredImplicit(String name) {
         // Generated convenience method for requiredImplicitWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        return requiredImplicitWithResponse(BinaryData.fromObject(bodyModel), requestOptions).flatMap(FluxUtil::toMono);
+        RequiredImplicitRequest requiredImplicitRequestObj = new RequiredImplicitRequest(name);
+        BinaryData requiredImplicitRequest = BinaryData.fromObject(requiredImplicitRequestObj);
+        return requiredImplicitWithResponse(requiredImplicitRequest, requestOptions).flatMap(FluxUtil::toMono);
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityClient.java b/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityClient.java
index 186af6cb7b..ee0d67d69c 100644
--- a/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityClient.java
+++ b/typespec-tests/src/main/java/com/parameters/bodyoptionality/BodyOptionalityClient.java
@@ -16,6 +16,7 @@
 import com.azure.core.http.rest.Response;
 import com.azure.core.util.BinaryData;
 import com.parameters.bodyoptionality.implementation.BodyOptionalityClientImpl;
+import com.parameters.bodyoptionality.implementation.models.RequiredImplicitRequest;
 import com.parameters.bodyoptionality.models.BodyModel;
 
 /**
@@ -70,7 +71,7 @@ public Response<Void> requiredExplicitWithResponse(BinaryData body, RequestOptio
      * }
      * }</pre>
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param requiredImplicitRequest The requiredImplicitRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -80,8 +81,9 @@ public Response<Void> requiredExplicitWithResponse(BinaryData body, RequestOptio
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Response<Void> requiredImplicitWithResponse(BinaryData bodyModel, RequestOptions requestOptions) {
-        return this.serviceClient.requiredImplicitWithResponse(bodyModel, requestOptions);
+    public Response<Void> requiredImplicitWithResponse(BinaryData requiredImplicitRequest,
+        RequestOptions requestOptions) {
+        return this.serviceClient.requiredImplicitWithResponse(requiredImplicitRequest, requestOptions);
     }
 
     /**
@@ -106,7 +108,7 @@ public void requiredExplicit(BodyModel body) {
     /**
      * The requiredImplicit operation.
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param name The name parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -116,9 +118,11 @@ public void requiredExplicit(BodyModel body) {
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public void requiredImplicit(BodyModel bodyModel) {
+    public void requiredImplicit(String name) {
         // Generated convenience method for requiredImplicitWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        requiredImplicitWithResponse(BinaryData.fromObject(bodyModel), requestOptions).getValue();
+        RequiredImplicitRequest requiredImplicitRequestObj = new RequiredImplicitRequest(name);
+        BinaryData requiredImplicitRequest = BinaryData.fromObject(requiredImplicitRequestObj);
+        requiredImplicitWithResponse(requiredImplicitRequest, requestOptions).getValue();
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/BodyOptionalityClientImpl.java b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/BodyOptionalityClientImpl.java
index ea96a36d13..9e11573ccc 100644
--- a/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/BodyOptionalityClientImpl.java
+++ b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/BodyOptionalityClientImpl.java
@@ -145,7 +145,8 @@ Response<Void> requiredExplicitSync(@HeaderParam("accept") String accept,
         @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Mono<Response<Void>> requiredImplicit(@HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData bodyModel, RequestOptions requestOptions, Context context);
+            @BodyParam("application/json") BinaryData requiredImplicitRequest, RequestOptions requestOptions,
+            Context context);
 
         @Post("/parameters/body-optionality/required-implicit")
         @ExpectedResponses({ 204 })
@@ -154,7 +155,8 @@ Mono<Response<Void>> requiredImplicit(@HeaderParam("accept") String accept,
         @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Response<Void> requiredImplicitSync(@HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData bodyModel, RequestOptions requestOptions, Context context);
+            @BodyParam("application/json") BinaryData requiredImplicitRequest, RequestOptions requestOptions,
+            Context context);
     }
 
     /**
@@ -215,7 +217,7 @@ public Response<Void> requiredExplicitWithResponse(BinaryData body, RequestOptio
      * }
      * }</pre>
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param requiredImplicitRequest The requiredImplicitRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -224,9 +226,11 @@ public Response<Void> requiredExplicitWithResponse(BinaryData body, RequestOptio
      * @return the {@link Response} on successful completion of {@link Mono}.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Response<Void>> requiredImplicitWithResponseAsync(BinaryData bodyModel, RequestOptions requestOptions) {
+    public Mono<Response<Void>> requiredImplicitWithResponseAsync(BinaryData requiredImplicitRequest,
+        RequestOptions requestOptions) {
         final String accept = "application/json";
-        return FluxUtil.withContext(context -> service.requiredImplicit(accept, bodyModel, requestOptions, context));
+        return FluxUtil
+            .withContext(context -> service.requiredImplicit(accept, requiredImplicitRequest, requestOptions, context));
     }
 
     /**
@@ -239,7 +243,7 @@ public Mono<Response<Void>> requiredImplicitWithResponseAsync(BinaryData bodyMod
      * }
      * }</pre>
      * 
-     * @param bodyModel The bodyModel parameter.
+     * @param requiredImplicitRequest The requiredImplicitRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -248,8 +252,9 @@ public Mono<Response<Void>> requiredImplicitWithResponseAsync(BinaryData bodyMod
      * @return the {@link Response}.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Response<Void> requiredImplicitWithResponse(BinaryData bodyModel, RequestOptions requestOptions) {
+    public Response<Void> requiredImplicitWithResponse(BinaryData requiredImplicitRequest,
+        RequestOptions requestOptions) {
         final String accept = "application/json";
-        return service.requiredImplicitSync(accept, bodyModel, requestOptions, Context.NONE);
+        return service.requiredImplicitSync(accept, requiredImplicitRequest, requestOptions, Context.NONE);
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/RequiredImplicitRequest.java b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/RequiredImplicitRequest.java
new file mode 100644
index 0000000000..ede65f22dd
--- /dev/null
+++ b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/RequiredImplicitRequest.java
@@ -0,0 +1,83 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+// Code generated by Microsoft (R) TypeSpec Code Generator.
+
+package com.parameters.bodyoptionality.implementation.models;
+
+import com.azure.core.annotation.Generated;
+import com.azure.core.annotation.Immutable;
+import com.azure.json.JsonReader;
+import com.azure.json.JsonSerializable;
+import com.azure.json.JsonToken;
+import com.azure.json.JsonWriter;
+import java.io.IOException;
+
+/**
+ * The RequiredImplicitRequest model.
+ */
+@Immutable
+public final class RequiredImplicitRequest implements JsonSerializable<RequiredImplicitRequest> {
+    /*
+     * The name property.
+     */
+    @Generated
+    private final String name;
+
+    /**
+     * Creates an instance of RequiredImplicitRequest class.
+     * 
+     * @param name the name value to set.
+     */
+    @Generated
+    public RequiredImplicitRequest(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Get the name property: The name property.
+     * 
+     * @return the name value.
+     */
+    @Generated
+    public String getName() {
+        return this.name;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Generated
+    @Override
+    public JsonWriter toJson(JsonWriter jsonWriter) throws IOException {
+        jsonWriter.writeStartObject();
+        jsonWriter.writeStringField("name", this.name);
+        return jsonWriter.writeEndObject();
+    }
+
+    /**
+     * Reads an instance of RequiredImplicitRequest from the JsonReader.
+     * 
+     * @param jsonReader The JsonReader being read.
+     * @return An instance of RequiredImplicitRequest if the JsonReader was pointing to an instance of it, or null if it
+     * was pointing to JSON null.
+     * @throws IllegalStateException If the deserialized JSON object was missing any required properties.
+     * @throws IOException If an error occurs while reading the RequiredImplicitRequest.
+     */
+    @Generated
+    public static RequiredImplicitRequest fromJson(JsonReader jsonReader) throws IOException {
+        return jsonReader.readObject(reader -> {
+            String name = null;
+            while (reader.nextToken() != JsonToken.END_OBJECT) {
+                String fieldName = reader.getFieldName();
+                reader.nextToken();
+
+                if ("name".equals(fieldName)) {
+                    name = reader.getString();
+                } else {
+                    reader.skipChildren();
+                }
+            }
+            return new RequiredImplicitRequest(name);
+        });
+    }
+}
diff --git a/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/package-info.java b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/package-info.java
new file mode 100644
index 0000000000..5c9f425dcb
--- /dev/null
+++ b/typespec-tests/src/main/java/com/parameters/bodyoptionality/implementation/models/package-info.java
@@ -0,0 +1,11 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+// Code generated by Microsoft (R) TypeSpec Code Generator.
+
+/**
+ * <!-- start generated doc -->
+ * Package containing the data models for BodyOptionality.
+ * Test describing optionality of the request body.
+ * <!-- end generated doc -->
+ */
+package com.parameters.bodyoptionality.implementation.models;
diff --git a/typespec-tests/src/main/java/com/parameters/spread/AliasAsyncClient.java b/typespec-tests/src/main/java/com/parameters/spread/AliasAsyncClient.java
index 1bc86e295c..40d90760ce 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/AliasAsyncClient.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/AliasAsyncClient.java
@@ -17,7 +17,7 @@
 import com.azure.core.util.BinaryData;
 import com.azure.core.util.FluxUtil;
 import com.parameters.spread.implementation.AliasImpl;
-import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest;
+import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest1;
 import com.parameters.spread.implementation.models.SpreadAsRequestParameterRequest;
 import com.parameters.spread.implementation.models.SpreadWithMultipleParametersRequest;
 import com.parameters.spread.models.SpreadWithMultipleParametersOptions;
@@ -144,7 +144,7 @@ public Mono<Response<Void>> spreadWithMultipleParametersWithResponse(String id,
     public Mono<Void> spreadAsRequestBody(String name) {
         // Generated convenience method for spreadAsRequestBodyWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        SpreadAsRequestBodyRequest spreadAsRequestBodyRequestObj = new SpreadAsRequestBodyRequest(name);
+        SpreadAsRequestBodyRequest1 spreadAsRequestBodyRequestObj = new SpreadAsRequestBodyRequest1(name);
         BinaryData spreadAsRequestBodyRequest = BinaryData.fromObject(spreadAsRequestBodyRequestObj);
         return spreadAsRequestBodyWithResponse(spreadAsRequestBodyRequest, requestOptions).flatMap(FluxUtil::toMono);
     }
diff --git a/typespec-tests/src/main/java/com/parameters/spread/AliasClient.java b/typespec-tests/src/main/java/com/parameters/spread/AliasClient.java
index e0e081738a..ea05094c51 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/AliasClient.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/AliasClient.java
@@ -16,7 +16,7 @@
 import com.azure.core.http.rest.Response;
 import com.azure.core.util.BinaryData;
 import com.parameters.spread.implementation.AliasImpl;
-import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest;
+import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest1;
 import com.parameters.spread.implementation.models.SpreadAsRequestParameterRequest;
 import com.parameters.spread.implementation.models.SpreadWithMultipleParametersRequest;
 import com.parameters.spread.models.SpreadWithMultipleParametersOptions;
@@ -141,7 +141,7 @@ public Response<Void> spreadWithMultipleParametersWithResponse(String id, String
     public void spreadAsRequestBody(String name) {
         // Generated convenience method for spreadAsRequestBodyWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        SpreadAsRequestBodyRequest spreadAsRequestBodyRequestObj = new SpreadAsRequestBodyRequest(name);
+        SpreadAsRequestBodyRequest1 spreadAsRequestBodyRequestObj = new SpreadAsRequestBodyRequest1(name);
         BinaryData spreadAsRequestBodyRequest = BinaryData.fromObject(spreadAsRequestBodyRequestObj);
         spreadAsRequestBodyWithResponse(spreadAsRequestBodyRequest, requestOptions).getValue();
     }
diff --git a/typespec-tests/src/main/java/com/parameters/spread/ModelAsyncClient.java b/typespec-tests/src/main/java/com/parameters/spread/ModelAsyncClient.java
index 5d560ed155..d1f6411eb9 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/ModelAsyncClient.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/ModelAsyncClient.java
@@ -17,8 +17,9 @@
 import com.azure.core.util.BinaryData;
 import com.azure.core.util.FluxUtil;
 import com.parameters.spread.implementation.ModelsImpl;
+import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest;
+import com.parameters.spread.implementation.models.SpreadCompositeRequestMixRequest;
 import com.parameters.spread.models.BodyParameter;
-import com.parameters.spread.models.CompositeRequestMix;
 import reactor.core.publisher.Mono;
 
 /**
@@ -49,7 +50,7 @@ public final class ModelAsyncClient {
      * }
      * }</pre>
      * 
-     * @param bodyParameter This is a simple model.
+     * @param spreadAsRequestBodyRequest1 The spreadAsRequestBodyRequest1 parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -59,9 +60,9 @@ public final class ModelAsyncClient {
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Response<Void>> spreadAsRequestBodyWithResponse(BinaryData bodyParameter,
+    public Mono<Response<Void>> spreadAsRequestBodyWithResponse(BinaryData spreadAsRequestBodyRequest1,
         RequestOptions requestOptions) {
-        return this.serviceClient.spreadAsRequestBodyWithResponseAsync(bodyParameter, requestOptions);
+        return this.serviceClient.spreadAsRequestBodyWithResponseAsync(spreadAsRequestBodyRequest1, requestOptions);
     }
 
     /**
@@ -147,7 +148,7 @@ public Mono<Response<Void>> spreadCompositeRequestWithResponse(String name, Stri
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param spreadCompositeRequestMixRequest The spreadCompositeRequestMixRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -158,15 +159,15 @@ public Mono<Response<Void>> spreadCompositeRequestWithResponse(String name, Stri
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
     public Mono<Response<Void>> spreadCompositeRequestMixWithResponse(String name, String testHeader,
-        BinaryData compositeRequestMix, RequestOptions requestOptions) {
-        return this.serviceClient.spreadCompositeRequestMixWithResponseAsync(name, testHeader, compositeRequestMix,
-            requestOptions);
+        BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions) {
+        return this.serviceClient.spreadCompositeRequestMixWithResponseAsync(name, testHeader,
+            spreadCompositeRequestMixRequest, requestOptions);
     }
 
     /**
      * The spreadAsRequestBody operation.
      * 
-     * @param bodyParameter This is a simple model.
+     * @param name The name parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -177,11 +178,12 @@ public Mono<Response<Void>> spreadCompositeRequestMixWithResponse(String name, S
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Void> spreadAsRequestBody(BodyParameter bodyParameter) {
+    public Mono<Void> spreadAsRequestBody(String name) {
         // Generated convenience method for spreadAsRequestBodyWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        return spreadAsRequestBodyWithResponse(BinaryData.fromObject(bodyParameter), requestOptions)
-            .flatMap(FluxUtil::toMono);
+        SpreadAsRequestBodyRequest spreadAsRequestBodyRequest1Obj = new SpreadAsRequestBodyRequest(name);
+        BinaryData spreadAsRequestBodyRequest1 = BinaryData.fromObject(spreadAsRequestBodyRequest1Obj);
+        return spreadAsRequestBodyWithResponse(spreadAsRequestBodyRequest1, requestOptions).flatMap(FluxUtil::toMono);
     }
 
     /**
@@ -255,7 +257,7 @@ public Mono<Void> spreadCompositeRequest(String name, String testHeader, BodyPar
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param prop The prop parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -266,11 +268,13 @@ public Mono<Void> spreadCompositeRequest(String name, String testHeader, BodyPar
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Void> spreadCompositeRequestMix(String name, String testHeader,
-        CompositeRequestMix compositeRequestMix) {
+    public Mono<Void> spreadCompositeRequestMix(String name, String testHeader, String prop) {
         // Generated convenience method for spreadCompositeRequestMixWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        return spreadCompositeRequestMixWithResponse(name, testHeader, BinaryData.fromObject(compositeRequestMix),
-            requestOptions).flatMap(FluxUtil::toMono);
+        SpreadCompositeRequestMixRequest spreadCompositeRequestMixRequestObj
+            = new SpreadCompositeRequestMixRequest(prop);
+        BinaryData spreadCompositeRequestMixRequest = BinaryData.fromObject(spreadCompositeRequestMixRequestObj);
+        return spreadCompositeRequestMixWithResponse(name, testHeader, spreadCompositeRequestMixRequest, requestOptions)
+            .flatMap(FluxUtil::toMono);
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/spread/ModelClient.java b/typespec-tests/src/main/java/com/parameters/spread/ModelClient.java
index 162a7ae04b..58eb3be14e 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/ModelClient.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/ModelClient.java
@@ -16,8 +16,9 @@
 import com.azure.core.http.rest.Response;
 import com.azure.core.util.BinaryData;
 import com.parameters.spread.implementation.ModelsImpl;
+import com.parameters.spread.implementation.models.SpreadAsRequestBodyRequest;
+import com.parameters.spread.implementation.models.SpreadCompositeRequestMixRequest;
 import com.parameters.spread.models.BodyParameter;
-import com.parameters.spread.models.CompositeRequestMix;
 
 /**
  * Initializes a new instance of the synchronous SpreadClient type.
@@ -47,7 +48,7 @@ public final class ModelClient {
      * }
      * }</pre>
      * 
-     * @param bodyParameter This is a simple model.
+     * @param spreadAsRequestBodyRequest1 The spreadAsRequestBodyRequest1 parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -57,8 +58,9 @@ public final class ModelClient {
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Response<Void> spreadAsRequestBodyWithResponse(BinaryData bodyParameter, RequestOptions requestOptions) {
-        return this.serviceClient.spreadAsRequestBodyWithResponse(bodyParameter, requestOptions);
+    public Response<Void> spreadAsRequestBodyWithResponse(BinaryData spreadAsRequestBodyRequest1,
+        RequestOptions requestOptions) {
+        return this.serviceClient.spreadAsRequestBodyWithResponse(spreadAsRequestBodyRequest1, requestOptions);
     }
 
     /**
@@ -144,7 +146,7 @@ public Response<Void> spreadCompositeRequestWithResponse(String name, String tes
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param spreadCompositeRequestMixRequest The spreadCompositeRequestMixRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -155,15 +157,15 @@ public Response<Void> spreadCompositeRequestWithResponse(String name, String tes
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
     public Response<Void> spreadCompositeRequestMixWithResponse(String name, String testHeader,
-        BinaryData compositeRequestMix, RequestOptions requestOptions) {
-        return this.serviceClient.spreadCompositeRequestMixWithResponse(name, testHeader, compositeRequestMix,
-            requestOptions);
+        BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions) {
+        return this.serviceClient.spreadCompositeRequestMixWithResponse(name, testHeader,
+            spreadCompositeRequestMixRequest, requestOptions);
     }
 
     /**
      * The spreadAsRequestBody operation.
      * 
-     * @param bodyParameter This is a simple model.
+     * @param name The name parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -173,10 +175,12 @@ public Response<Void> spreadCompositeRequestMixWithResponse(String name, String
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public void spreadAsRequestBody(BodyParameter bodyParameter) {
+    public void spreadAsRequestBody(String name) {
         // Generated convenience method for spreadAsRequestBodyWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        spreadAsRequestBodyWithResponse(BinaryData.fromObject(bodyParameter), requestOptions).getValue();
+        SpreadAsRequestBodyRequest spreadAsRequestBodyRequest1Obj = new SpreadAsRequestBodyRequest(name);
+        BinaryData spreadAsRequestBodyRequest1 = BinaryData.fromObject(spreadAsRequestBodyRequest1Obj);
+        spreadAsRequestBodyWithResponse(spreadAsRequestBodyRequest1, requestOptions).getValue();
     }
 
     /**
@@ -244,7 +248,7 @@ public void spreadCompositeRequest(String name, String testHeader, BodyParameter
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param prop The prop parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -254,10 +258,13 @@ public void spreadCompositeRequest(String name, String testHeader, BodyParameter
      */
     @Generated
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public void spreadCompositeRequestMix(String name, String testHeader, CompositeRequestMix compositeRequestMix) {
+    public void spreadCompositeRequestMix(String name, String testHeader, String prop) {
         // Generated convenience method for spreadCompositeRequestMixWithResponse
         RequestOptions requestOptions = new RequestOptions();
-        spreadCompositeRequestMixWithResponse(name, testHeader, BinaryData.fromObject(compositeRequestMix),
-            requestOptions).getValue();
+        SpreadCompositeRequestMixRequest spreadCompositeRequestMixRequestObj
+            = new SpreadCompositeRequestMixRequest(prop);
+        BinaryData spreadCompositeRequestMixRequest = BinaryData.fromObject(spreadCompositeRequestMixRequestObj);
+        spreadCompositeRequestMixWithResponse(name, testHeader, spreadCompositeRequestMixRequest, requestOptions)
+            .getValue();
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/spread/implementation/ModelsImpl.java b/typespec-tests/src/main/java/com/parameters/spread/implementation/ModelsImpl.java
index ba34bb436d..c56205230a 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/implementation/ModelsImpl.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/implementation/ModelsImpl.java
@@ -64,7 +64,8 @@ public interface ModelsService {
         @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Mono<Response<Void>> spreadAsRequestBody(@HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData bodyParameter, RequestOptions requestOptions, Context context);
+            @BodyParam("application/json") BinaryData spreadAsRequestBodyRequest1, RequestOptions requestOptions,
+            Context context);
 
         @Put("/parameters/spread/model/request-body")
         @ExpectedResponses({ 204 })
@@ -73,7 +74,8 @@ Mono<Response<Void>> spreadAsRequestBody(@HeaderParam("accept") String accept,
         @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Response<Void> spreadAsRequestBodySync(@HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData bodyParameter, RequestOptions requestOptions, Context context);
+            @BodyParam("application/json") BinaryData spreadAsRequestBodyRequest1, RequestOptions requestOptions,
+            Context context);
 
         @Put("/parameters/spread/model/composite-request-only-with-body")
         @ExpectedResponses({ 204 })
@@ -141,7 +143,7 @@ Response<Void> spreadCompositeRequestSync(@PathParam("name") String name,
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Mono<Response<Void>> spreadCompositeRequestMix(@PathParam("name") String name,
             @HeaderParam("test-header") String testHeader, @HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData compositeRequestMix, RequestOptions requestOptions,
+            @BodyParam("application/json") BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions,
             Context context);
 
         @Put("/parameters/spread/model/composite-request-mix/{name}")
@@ -152,7 +154,7 @@ Mono<Response<Void>> spreadCompositeRequestMix(@PathParam("name") String name,
         @UnexpectedResponseExceptionType(HttpResponseException.class)
         Response<Void> spreadCompositeRequestMixSync(@PathParam("name") String name,
             @HeaderParam("test-header") String testHeader, @HeaderParam("accept") String accept,
-            @BodyParam("application/json") BinaryData compositeRequestMix, RequestOptions requestOptions,
+            @BodyParam("application/json") BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions,
             Context context);
     }
 
@@ -166,7 +168,7 @@ Response<Void> spreadCompositeRequestMixSync(@PathParam("name") String name,
      * }
      * }</pre>
      * 
-     * @param bodyParameter This is a simple model.
+     * @param spreadAsRequestBodyRequest1 The spreadAsRequestBodyRequest1 parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -175,11 +177,11 @@ Response<Void> spreadCompositeRequestMixSync(@PathParam("name") String name,
      * @return the {@link Response} on successful completion of {@link Mono}.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Mono<Response<Void>> spreadAsRequestBodyWithResponseAsync(BinaryData bodyParameter,
+    public Mono<Response<Void>> spreadAsRequestBodyWithResponseAsync(BinaryData spreadAsRequestBodyRequest1,
         RequestOptions requestOptions) {
         final String accept = "application/json";
-        return FluxUtil
-            .withContext(context -> service.spreadAsRequestBody(accept, bodyParameter, requestOptions, context));
+        return FluxUtil.withContext(
+            context -> service.spreadAsRequestBody(accept, spreadAsRequestBodyRequest1, requestOptions, context));
     }
 
     /**
@@ -192,7 +194,7 @@ public Mono<Response<Void>> spreadAsRequestBodyWithResponseAsync(BinaryData body
      * }
      * }</pre>
      * 
-     * @param bodyParameter This is a simple model.
+     * @param spreadAsRequestBodyRequest1 The spreadAsRequestBodyRequest1 parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -201,9 +203,10 @@ public Mono<Response<Void>> spreadAsRequestBodyWithResponseAsync(BinaryData body
      * @return the {@link Response}.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
-    public Response<Void> spreadAsRequestBodyWithResponse(BinaryData bodyParameter, RequestOptions requestOptions) {
+    public Response<Void> spreadAsRequestBodyWithResponse(BinaryData spreadAsRequestBodyRequest1,
+        RequestOptions requestOptions) {
         final String accept = "application/json";
-        return service.spreadAsRequestBodySync(accept, bodyParameter, requestOptions, Context.NONE);
+        return service.spreadAsRequestBodySync(accept, spreadAsRequestBodyRequest1, requestOptions, Context.NONE);
     }
 
     /**
@@ -363,7 +366,7 @@ public Response<Void> spreadCompositeRequestWithResponse(String name, String tes
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param spreadCompositeRequestMixRequest The spreadCompositeRequestMixRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -373,10 +376,10 @@ public Response<Void> spreadCompositeRequestWithResponse(String name, String tes
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
     public Mono<Response<Void>> spreadCompositeRequestMixWithResponseAsync(String name, String testHeader,
-        BinaryData compositeRequestMix, RequestOptions requestOptions) {
+        BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions) {
         final String accept = "application/json";
         return FluxUtil.withContext(context -> service.spreadCompositeRequestMix(name, testHeader, accept,
-            compositeRequestMix, requestOptions, context));
+            spreadCompositeRequestMixRequest, requestOptions, context));
     }
 
     /**
@@ -391,7 +394,7 @@ public Mono<Response<Void>> spreadCompositeRequestMixWithResponseAsync(String na
      * 
      * @param name The name parameter.
      * @param testHeader The testHeader parameter.
-     * @param compositeRequestMix This is a model with non-body http request decorator.
+     * @param spreadCompositeRequestMixRequest The spreadCompositeRequestMixRequest parameter.
      * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
      * @throws HttpResponseException thrown if the request is rejected by server.
      * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
@@ -401,9 +404,9 @@ public Mono<Response<Void>> spreadCompositeRequestMixWithResponseAsync(String na
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
     public Response<Void> spreadCompositeRequestMixWithResponse(String name, String testHeader,
-        BinaryData compositeRequestMix, RequestOptions requestOptions) {
+        BinaryData spreadCompositeRequestMixRequest, RequestOptions requestOptions) {
         final String accept = "application/json";
-        return service.spreadCompositeRequestMixSync(name, testHeader, accept, compositeRequestMix, requestOptions,
-            Context.NONE);
+        return service.spreadCompositeRequestMixSync(name, testHeader, accept, spreadCompositeRequestMixRequest,
+            requestOptions, Context.NONE);
     }
 }
diff --git a/typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadAsRequestBodyRequest1.java b/typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadAsRequestBodyRequest1.java
new file mode 100644
index 0000000000..6117089542
--- /dev/null
+++ b/typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadAsRequestBodyRequest1.java
@@ -0,0 +1,83 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+// Code generated by Microsoft (R) TypeSpec Code Generator.
+
+package com.parameters.spread.implementation.models;
+
+import com.azure.core.annotation.Generated;
+import com.azure.core.annotation.Immutable;
+import com.azure.json.JsonReader;
+import com.azure.json.JsonSerializable;
+import com.azure.json.JsonToken;
+import com.azure.json.JsonWriter;
+import java.io.IOException;
+
+/**
+ * The SpreadAsRequestBodyRequest1 model.
+ */
+@Immutable
+public final class SpreadAsRequestBodyRequest1 implements JsonSerializable<SpreadAsRequestBodyRequest1> {
+    /*
+     * The name property.
+     */
+    @Generated
+    private final String name;
+
+    /**
+     * Creates an instance of SpreadAsRequestBodyRequest1 class.
+     * 
+     * @param name the name value to set.
+     */
+    @Generated
+    public SpreadAsRequestBodyRequest1(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Get the name property: The name property.
+     * 
+     * @return the name value.
+     */
+    @Generated
+    public String getName() {
+        return this.name;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Generated
+    @Override
+    public JsonWriter toJson(JsonWriter jsonWriter) throws IOException {
+        jsonWriter.writeStartObject();
+        jsonWriter.writeStringField("name", this.name);
+        return jsonWriter.writeEndObject();
+    }
+
+    /**
+     * Reads an instance of SpreadAsRequestBodyRequest1 from the JsonReader.
+     * 
+     * @param jsonReader The JsonReader being read.
+     * @return An instance of SpreadAsRequestBodyRequest1 if the JsonReader was pointing to an instance of it, or null
+     * if it was pointing to JSON null.
+     * @throws IllegalStateException If the deserialized JSON object was missing any required properties.
+     * @throws IOException If an error occurs while reading the SpreadAsRequestBodyRequest1.
+     */
+    @Generated
+    public static SpreadAsRequestBodyRequest1 fromJson(JsonReader jsonReader) throws IOException {
+        return jsonReader.readObject(reader -> {
+            String name = null;
+            while (reader.nextToken() != JsonToken.END_OBJECT) {
+                String fieldName = reader.getFieldName();
+                reader.nextToken();
+
+                if ("name".equals(fieldName)) {
+                    name = reader.getString();
+                } else {
+                    reader.skipChildren();
+                }
+            }
+            return new SpreadAsRequestBodyRequest1(name);
+        });
+    }
+}
diff --git a/typespec-tests/src/main/java/com/parameters/spread/models/CompositeRequestMix.java b/typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadCompositeRequestMixRequest.java
similarity index 69%
rename from typespec-tests/src/main/java/com/parameters/spread/models/CompositeRequestMix.java
rename to typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadCompositeRequestMixRequest.java
index 8c2cce8c38..c893c0dd01 100644
--- a/typespec-tests/src/main/java/com/parameters/spread/models/CompositeRequestMix.java
+++ b/typespec-tests/src/main/java/com/parameters/spread/implementation/models/SpreadCompositeRequestMixRequest.java
@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 // Code generated by Microsoft (R) TypeSpec Code Generator.
 
-package com.parameters.spread.models;
+package com.parameters.spread.implementation.models;
 
 import com.azure.core.annotation.Generated;
 import com.azure.core.annotation.Immutable;
@@ -13,10 +13,10 @@
 import java.io.IOException;
 
 /**
- * This is a model with non-body http request decorator.
+ * The SpreadCompositeRequestMixRequest model.
  */
 @Immutable
-public final class CompositeRequestMix implements JsonSerializable<CompositeRequestMix> {
+public final class SpreadCompositeRequestMixRequest implements JsonSerializable<SpreadCompositeRequestMixRequest> {
     /*
      * The prop property.
      */
@@ -24,12 +24,12 @@ public final class CompositeRequestMix implements JsonSerializable<CompositeRequ
     private final String prop;
 
     /**
-     * Creates an instance of CompositeRequestMix class.
+     * Creates an instance of SpreadCompositeRequestMixRequest class.
      * 
      * @param prop the prop value to set.
      */
     @Generated
-    public CompositeRequestMix(String prop) {
+    public SpreadCompositeRequestMixRequest(String prop) {
         this.prop = prop;
     }
 
@@ -55,16 +55,16 @@ public JsonWriter toJson(JsonWriter jsonWriter) throws IOException {
     }
 
     /**
-     * Reads an instance of CompositeRequestMix from the JsonReader.
+     * Reads an instance of SpreadCompositeRequestMixRequest from the JsonReader.
      * 
      * @param jsonReader The JsonReader being read.
-     * @return An instance of CompositeRequestMix if the JsonReader was pointing to an instance of it, or null if it was
-     * pointing to JSON null.
+     * @return An instance of SpreadCompositeRequestMixRequest if the JsonReader was pointing to an instance of it, or
+     * null if it was pointing to JSON null.
      * @throws IllegalStateException If the deserialized JSON object was missing any required properties.
-     * @throws IOException If an error occurs while reading the CompositeRequestMix.
+     * @throws IOException If an error occurs while reading the SpreadCompositeRequestMixRequest.
      */
     @Generated
-    public static CompositeRequestMix fromJson(JsonReader jsonReader) throws IOException {
+    public static SpreadCompositeRequestMixRequest fromJson(JsonReader jsonReader) throws IOException {
         return jsonReader.readObject(reader -> {
             String prop = null;
             while (reader.nextToken() != JsonToken.END_OBJECT) {
@@ -77,7 +77,7 @@ public static CompositeRequestMix fromJson(JsonReader jsonReader) throws IOExcep
                     reader.skipChildren();
                 }
             }
-            return new CompositeRequestMix(prop);
+            return new SpreadCompositeRequestMixRequest(prop);
         });
     }
 }
diff --git a/typespec-tests/src/test/java/com/client/naming/NamingTests.java b/typespec-tests/src/test/java/com/client/naming/NamingTests.java
index 5ebb4b78c5..6d6c83a638 100644
--- a/typespec-tests/src/test/java/com/client/naming/NamingTests.java
+++ b/typespec-tests/src/test/java/com/client/naming/NamingTests.java
@@ -17,7 +17,7 @@ public class NamingTests {
     private final NamingClient client = new NamingClientBuilder().buildClient();
 
     // client name should be "ClientModel", currently a bug in TCGC
-    private final ModelClient modelClient = new NamingClientBuilder().buildModelClient();
+    private final ClientModelClient modelClient = new NamingClientBuilder().buildClientModelClient();
 
     private final UnionEnumClient enumClient = new NamingClientBuilder().buildUnionEnumClient();
 
diff --git a/typespec-tests/src/test/java/com/client/naming/generated/NamingClientTestBase.java b/typespec-tests/src/test/java/com/client/naming/generated/NamingClientTestBase.java
index 755c1c3625..966f8e88d1 100644
--- a/typespec-tests/src/test/java/com/client/naming/generated/NamingClientTestBase.java
+++ b/typespec-tests/src/test/java/com/client/naming/generated/NamingClientTestBase.java
@@ -13,7 +13,7 @@
 import com.azure.core.http.policy.HttpLogOptions;
 import com.azure.core.test.TestMode;
 import com.azure.core.test.TestProxyTestBase;
-import com.client.naming.ModelClient;
+import com.client.naming.ClientModelClient;
 import com.client.naming.NamingClient;
 import com.client.naming.NamingClientBuilder;
 import com.client.naming.UnionEnumClient;
@@ -21,7 +21,7 @@
 class NamingClientTestBase extends TestProxyTestBase {
     protected NamingClient namingClient;
 
-    protected ModelClient modelClient;
+    protected ClientModelClient clientModelClient;
 
     protected UnionEnumClient unionEnumClient;
 
@@ -36,14 +36,14 @@ protected void beforeTest() {
         }
         namingClient = namingClientbuilder.buildClient();
 
-        NamingClientBuilder modelClientbuilder = new NamingClientBuilder().httpClient(HttpClient.createDefault())
+        NamingClientBuilder clientModelClientbuilder = new NamingClientBuilder().httpClient(HttpClient.createDefault())
             .httpLogOptions(new HttpLogOptions().setLogLevel(HttpLogDetailLevel.BASIC));
         if (getTestMode() == TestMode.PLAYBACK) {
-            modelClientbuilder.httpClient(interceptorManager.getPlaybackClient());
+            clientModelClientbuilder.httpClient(interceptorManager.getPlaybackClient());
         } else if (getTestMode() == TestMode.RECORD) {
-            modelClientbuilder.addPolicy(interceptorManager.getRecordPolicy());
+            clientModelClientbuilder.addPolicy(interceptorManager.getRecordPolicy());
         }
-        modelClient = modelClientbuilder.buildModelClient();
+        clientModelClient = clientModelClientbuilder.buildClientModelClient();
 
         NamingClientBuilder unionEnumClientbuilder = new NamingClientBuilder().httpClient(HttpClient.createDefault())
             .httpLogOptions(new HttpLogOptions().setLogLevel(HttpLogDetailLevel.BASIC));
diff --git a/typespec-tests/src/test/java/com/parameters/bodyoptionality/BodyTests.java b/typespec-tests/src/test/java/com/parameters/bodyoptionality/BodyTests.java
index fe4a96053d..dcb891fbc7 100644
--- a/typespec-tests/src/test/java/com/parameters/bodyoptionality/BodyTests.java
+++ b/typespec-tests/src/test/java/com/parameters/bodyoptionality/BodyTests.java
@@ -48,7 +48,7 @@ private void validateContentTypeHeader(boolean exists) {
     public void testBodyOptionality() {
         client.requiredExplicit(new BodyModel("foo"));
 
-        client.requiredImplicit(new BodyModel("foo"));
+        client.requiredImplicit("foo");
 
         optionalClient.set(new BodyModel("foo"));
         validationPolicy.validateContentTypeHeader(true);
diff --git a/typespec-tests/src/test/java/com/parameters/spread/SpreadTests.java b/typespec-tests/src/test/java/com/parameters/spread/SpreadTests.java
index e3b82ee9d5..e2472fd7ab 100644
--- a/typespec-tests/src/test/java/com/parameters/spread/SpreadTests.java
+++ b/typespec-tests/src/test/java/com/parameters/spread/SpreadTests.java
@@ -4,7 +4,6 @@
 package com.parameters.spread;
 
 import com.parameters.spread.models.BodyParameter;
-import com.parameters.spread.models.CompositeRequestMix;
 import com.parameters.spread.models.SpreadWithMultipleParametersOptions;
 import org.junit.jupiter.api.Test;
 
@@ -28,10 +27,10 @@ public void testSpread() {
     @Test
     public void testModel() {
 
-        modelClient.spreadAsRequestBody(new BodyParameter("foo"));
+        modelClient.spreadAsRequestBody("foo");
         modelClient.spreadCompositeRequestOnlyWithBody(new BodyParameter("foo"));
         modelClient.spreadCompositeRequestWithoutBody("foo", "bar");
         modelClient.spreadCompositeRequest("foo", "bar", new BodyParameter("foo"));
-        modelClient.spreadCompositeRequestMix("foo", "bar", new CompositeRequestMix("foo"));
+        modelClient.spreadCompositeRequestMix("foo", "bar", "foo");
     }
 }