diff --git a/content/canvas/test/webgl/failing_tests_windows.txt b/content/canvas/test/webgl/failing_tests_windows.txt
index f7708d2df545..78fbcd46f2d0 100644
--- a/content/canvas/test/webgl/failing_tests_windows.txt
+++ b/content/canvas/test/webgl/failing_tests_windows.txt
@@ -3,3 +3,4 @@ conformance/glsl/functions/glsl-function-atan.html
 conformance/glsl/functions/glsl-function-atan-xy.html
 conformance/more/conformance/quickCheckAPI-S_V.html
 conformance/glsl/misc/struct-nesting-under-maximum.html
+conformance/more/functions/uniformfArrayLen1.html