diff --git a/src/renderers/testing/ReactTestRendererFiber.js b/src/renderers/testing/ReactTestRendererFiber.js
index e9db09a3ce..2ce0d79788 100644
--- a/src/renderers/testing/ReactTestRendererFiber.js
+++ b/src/renderers/testing/ReactTestRendererFiber.js
@@ -21,7 +21,7 @@ import type { TestRendererOptions } from 'ReactTestMount';
 
 type ReactTestRendererJSON = {|
   type : string,
-  props : {[propName: string] : string },
+  props : {[propName: string] : any },
   children : null | Array<ReactTestRendererNode>,
   $$typeof ?: Symbol, // Optional because we add it with defineProperty().
 |};
diff --git a/src/renderers/testing/stack/ReactTestRendererStack.js b/src/renderers/testing/stack/ReactTestRendererStack.js
index 5e4ad70b3a..e0a9355e33 100644
--- a/src/renderers/testing/stack/ReactTestRendererStack.js
+++ b/src/renderers/testing/stack/ReactTestRendererStack.js
@@ -27,11 +27,12 @@ var invariant = require('invariant');
 
 import type { ReactElement } from 'ReactElementType';
 import type { ReactInstance } from 'ReactInstanceType';
+import type { ReactText } from 'ReactTypes';
 
 type ReactTestRendererJSON = {
   type: string,
-  props: { [propName: string]: string },
-  children: null | Array<string | ReactTestRendererJSON>,
+  props: { [propName: string]: any },
+  children: null | Array<ReactText | ReactTestRendererJSON>,
   $$typeof?: any
 }