diff --git a/test/ethread_test.cc b/test/ethread_test.cc
index 9c7e5d1..a7669e1 100644
--- a/test/ethread_test.cc
+++ b/test/ethread_test.cc
@@ -472,10 +472,17 @@
                            ::testing::Values(0, 2), ::testing::Values(0, 1));
 
 // Test cpu_used 7, 8, 9 here.
+// TODO(chiyotsai@google.com): The test on speed 9 is temporarily disabled due
+// to BUG=aomedia:2956. Re-enable it once it's fixed.
 AV1_INSTANTIATE_TEST_SUITE(AVxEncoderThreadRTTest,
                            ::testing::Values(::libaom_test::kRealTime),
-                           ::testing::Values(7, 8, 9), ::testing::Values(0, 2),
+                           ::testing::Values(7, 8), ::testing::Values(0, 2),
                            ::testing::Values(0, 2), ::testing::Values(0, 1));
+// AV1_INSTANTIATE_TEST_SUITE(AVxEncoderThreadRTTest,
+//                            ::testing::Values(::libaom_test::kRealTime),
+//                            ::testing::Values(7, 8, 9), ::testing::Values(0,
+//                            2),
+//                            ::testing::Values(0, 2), ::testing::Values(0, 1));
 
 // Test cpu_used 0, 1, 3 and 5.
 AV1_INSTANTIATE_TEST_SUITE(AVxEncoderThreadTestLarge,