diff --git a/content/media/test/Makefile.in b/content/media/test/Makefile.in
index cc9d4db25016..9527357ce3ba 100644
--- a/content/media/test/Makefile.in
+++ b/content/media/test/Makefile.in
@@ -95,12 +95,19 @@ _TEST_FILES = \
 		test_playback.html \
 		test_playback_errors.html \
 		test_readyState.html \
-		test_seek.html \
 		test_seek2.html \
 		test_volume.html \
 		use_large_cache.js \
 		$(NULL)
 
+ifneq ($(OS_ARCH),WINNT)
+# These tests are disabled on windows until we
+# figure out the random failures. See bug 475369.
+_TEST_FILES += \
+		test_seek.html \
+		$(NULL)
+endif
+
 # Ogg sample files
 _TEST_FILES += \
 		320x240.ogv \