diff --git a/TestFramework/Renderer/MTL/RendererMTL.mm b/TestFramework/Renderer/MTL/RendererMTL.mm
index 00fcad01b..fbf6bc0cf 100644
--- a/TestFramework/Renderer/MTL/RendererMTL.mm
+++ b/TestFramework/Renderer/MTL/RendererMTL.mm
@@ -112,6 +112,7 @@
 
 	// Finish the encoder
 	[mRenderEncoder endEncoding];
+	mRenderEncoder = nil;
 
 	// Schedule a present
 	[mCommandBuffer presentDrawable: mView.currentDrawable];