diff --git a/test/fuzzers/vp9_encoder_references_fuzzer.cc b/test/fuzzers/vp9_encoder_references_fuzzer.cc
index 09848ae..7503507 100644
--- a/test/fuzzers/vp9_encoder_references_fuzzer.cc
+++ b/test/fuzzers/vp9_encoder_references_fuzzer.cc
@@ -186,8 +186,6 @@
     // Ignore following field trials.
     if (key == "WebRTC-CongestionWindow" ||
         key == "WebRTC-UseBaseHeavyVP8TL3RateAllocation" ||
-        key == "WebRTC-SimulcastUpswitchHysteresisPercent" ||
-        key == "WebRTC-SimulcastScreenshareUpswitchHysteresisPercent" ||
         key == "WebRTC-VideoRateControl" ||
         key == "WebRTC-VP9-PerformanceFlags" ||
         key == "WebRTC-VP9VariableFramerateScreenshare" ||