diff --git a/spring-webflow/src/main/java/org/springframework/webflow/test/MockViewFactoryCreator.java b/spring-webflow/src/main/java/org/springframework/webflow/test/MockViewFactoryCreator.java
index d038df11..f5a176e8 100644
--- a/spring-webflow/src/main/java/org/springframework/webflow/test/MockViewFactoryCreator.java
+++ b/spring-webflow/src/main/java/org/springframework/webflow/test/MockViewFactoryCreator.java
@@ -106,7 +106,7 @@ class MockViewFactoryCreator implements ViewFactoryCreator {
 		}
 
 		public void render() throws IOException {
-			context.getExternalContext().getResponseWriter().append(viewId);
+			context.getExternalContext().getResponseWriter().write(viewId);
 		}
 	}
 }
\ No newline at end of file