diff --git a/samples/client/petstore/java/okhttp-gson-3.1/docs/FakeApi.md b/samples/client/petstore/java/okhttp-gson-3.1/docs/FakeApi.md
index ca306494677..684e019ef94 100644
--- a/samples/client/petstore/java/okhttp-gson-3.1/docs/FakeApi.md
+++ b/samples/client/petstore/java/okhttp-gson-3.1/docs/FakeApi.md
@@ -417,7 +417,7 @@ No authorization required
 ### HTTP response details
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
-| **200** |  |  -  |
+| **200** | required to pass validation |  -  |
 
 <a id="refToRefParameterAnyof"></a>
 # **refToRefParameterAnyof**
@@ -651,7 +651,7 @@ No authorization required
 ### HTTP response details
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
-| **200** |  |  -  |
+| **200** | required to pass validation |  -  |
 
 <a id="responseRefToRef"></a>
 # **responseRefToRef**
@@ -707,5 +707,5 @@ No authorization required
 ### HTTP response details
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
-| **200** |  |  -  |
+| **200** | required to pass validation |  -  |
 
diff --git a/samples/client/petstore/java/okhttp-gson-3.1/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/okhttp-gson-3.1/src/main/java/org/openapitools/client/api/FakeApi.java
index 800c13aa9ec..c342b4a442c 100644
--- a/samples/client/petstore/java/okhttp-gson-3.1/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/okhttp-gson-3.1/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -778,7 +778,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call refToRefParameterCall(UUID refToUuid, final ApiCallback _callback) throws ApiException {
@@ -849,7 +849,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public String refToRefParameter(UUID refToUuid) throws ApiException {
@@ -866,7 +866,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public ApiResponse<String> refToRefParameterWithHttpInfo(UUID refToUuid) throws ApiException {
@@ -885,7 +885,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call refToRefParameterAsync(UUID refToUuid, final ApiCallback<String> _callback) throws ApiException {
@@ -1258,7 +1258,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call responseRefToNoRefCall(final ApiCallback _callback) throws ApiException {
@@ -1319,7 +1319,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public String responseRefToNoRef() throws ApiException {
@@ -1335,7 +1335,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public ApiResponse<String> responseRefToNoRefWithHttpInfo() throws ApiException {
@@ -1353,7 +1353,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call responseRefToNoRefAsync(final ApiCallback<String> _callback) throws ApiException {
@@ -1371,7 +1371,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call responseRefToRefCall(final ApiCallback _callback) throws ApiException {
@@ -1432,7 +1432,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public String responseRefToRef() throws ApiException {
@@ -1448,7 +1448,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public ApiResponse<String> responseRefToRefWithHttpInfo() throws ApiException {
@@ -1466,7 +1466,7 @@ public class FakeApi {
      * @http.response.details
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
-        <tr><td> 200 </td><td>  </td><td>  -  </td></tr>
+        <tr><td> 200 </td><td> required to pass validation </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call responseRefToRefAsync(final ApiCallback<String> _callback) throws ApiException {