diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/rest-assured/api.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/rest-assured/api.mustache
index 940a25c269b..1d1a5d9ae54 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/rest-assured/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/rest-assured/api.mustache
@@ -73,6 +73,14 @@ public class {{classname}} {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public {{classname}} reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     {{#operations}}
     {{#operation}}
     /**
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/AnotherFakeApi.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/AnotherFakeApi.java
index 42c71810a90..b6a2b25fe8a 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/AnotherFakeApi.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/AnotherFakeApi.java
@@ -74,6 +74,14 @@ public class AnotherFakeApi {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public AnotherFakeApi reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * To test special tags
      * To test special tags
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeApi.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeApi.java
index 21b2dd3e589..8dc32bd5765 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeApi.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeApi.java
@@ -110,6 +110,14 @@ public class FakeApi {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public FakeApi reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * 
      * Test serialization of outer boolean types
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeClassnameTags123Api.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeClassnameTags123Api.java
index 77a47d95b82..349997f7ba7 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeClassnameTags123Api.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/FakeClassnameTags123Api.java
@@ -74,6 +74,14 @@ public class FakeClassnameTags123Api {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public FakeClassnameTags123Api reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * To test class name in snake case
      * 
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/PetApi.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/PetApi.java
index 8885b01f6a2..1fb00ae6195 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/PetApi.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/PetApi.java
@@ -105,6 +105,14 @@ public class PetApi {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public PetApi reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * Add a new pet to the store
      * 
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/StoreApi.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/StoreApi.java
index 6542851c376..27e37ed1d42 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/StoreApi.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/StoreApi.java
@@ -86,6 +86,14 @@ public class StoreApi {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public StoreApi reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * Delete purchase order by ID
      * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/UserApi.java b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/UserApi.java
index 342d58b4cb9..b854fdf5315 100644
--- a/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/UserApi.java
+++ b/samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/api/UserApi.java
@@ -102,6 +102,14 @@ public class UserApi {
         return this;
     }
 
+    /**
+    * Customise request specification
+    */
+    public UserApi reqSpec(Consumer<RequestSpecBuilder> consumer) {
+        consumer.accept(reqSpec);
+        return this;
+    }
+
     /**
      * Create user
      * This can only be done by the logged in user.