--- a/dom/canvas/test/webgl-mochitest/mochitest.ini
+++ b/dom/canvas/test/webgl-mochitest/mochitest.ini
@@ -53,16 +53,19 @@ fail-if = (os == 'android') || (os == 'w
 [regress/test_bug_1268096.html]
 
 
 [test_backends.html]
 [test_backbuffer_channels.html]
 [test_depth_readpixels.html]
 [test_canvas_size.html]
 [test_capture.html]
+# Skip on Windows 7 to prevent intermittent mochitest failure caused by OOM
+# under 32-bit environment
+skip-if = (os == 'win' && os_version == '6.1')
 support-files = ../captureStream_common.js
 # Even though we use ../ here, in the test HTML, we need to omit this. Sub-CWD relative
 # paths are fine, but they locate the file and dump it in the current directory.
 [test_cubemap_must_be_square.html]
 [test_depth_tex_lazy_clear.html]
 [test_draw.html]
 [test_fb_param.html]
 [test_fb_param_crash.html]