diff --git a/testsuite/gsk/test-render-nodes.c b/testsuite/gsk/test-render-nodes.c
index 672bfcd25e..de695f1198 100644
--- a/testsuite/gsk/test-render-nodes.c
+++ b/testsuite/gsk/test-render-nodes.c
@@ -443,10 +443,11 @@ opacity (void)
   return container;
 }
 
+#define N 5
+
 static GskRenderNode *
 color_matrix1 (void)
 {
-  const int N = 5;
   GskRenderNode *container_node;
   GskRenderNode *cairo_node = cairo ();
   GskRenderNode *n;
@@ -518,6 +519,8 @@ color_matrix1 (void)
   return container_node;
 }
 
+#undef N
+
 static GskRenderNode *
 transformed_clip (void)
 {