Fixes #23030 (#23567)

diff --git a/webxr/webGLCanvasContext_create_xrcompatible.https.html b/webxr/webGLCanvasContext_create_xrcompatible.https.html
index b83b960..8ba225b 100644
--- a/webxr/webGLCanvasContext_create_xrcompatible.https.html
+++ b/webxr/webGLCanvasContext_create_xrcompatible.https.html
@@ -16,7 +16,7 @@
 
             // Check that an offscreen context behaves no different.
             let offscreenCanvas = document.createElement('canvas');
-            let offscreenGl = webglCanvas.getContext(
+            let offscreenGl = offscreenCanvas.getContext(
               'webgl', {xrCompatible: true});
             assert_true(offscreenGl.getContextAttributes().xrCompatible);
           });