diff --git a/test/fuzzers/audio_processing_fuzzer.cc b/test/fuzzers/audio_processing_fuzzer.cc
index 9faea41fa2..9879106f54 100644
--- a/test/fuzzers/audio_processing_fuzzer.cc
+++ b/test/fuzzers/audio_processing_fuzzer.cc
@@ -24,8 +24,7 @@ size_t ByteToNativeRate(uint8_t data) {
   using Rate = AudioProcessing::NativeRate;
   switch (data % 4) {
     case 0:
-    // Breaks AEC3.
-    // return static_cast<size_t>(Rate::kSampleRate8kHz);
+      return static_cast<size_t>(Rate::kSampleRate8kHz);
     case 1:
       return static_cast<size_t>(Rate::kSampleRate16kHz);
     case 2:
diff --git a/test/fuzzers/audio_processing_fuzzer_configs.cc b/test/fuzzers/audio_processing_fuzzer_configs.cc
index ed34c35703..15e0beeba9 100644
--- a/test/fuzzers/audio_processing_fuzzer_configs.cc
+++ b/test/fuzzers/audio_processing_fuzzer_configs.cc
@@ -45,6 +45,11 @@ std::unique_ptr<AudioProcessing> CreateAPM(const uint8_t** data,
     return nullptr;
   }
 
+  // Filter out incompatible settings that lead to CHECK failures.
+  if (*use_aecm && *use_aec) {
+    return nullptr;
+  }
+
   // Components can be enabled through webrtc::Config and
   // webrtc::AudioProcessingConfig.
   Config config;
@@ -87,6 +92,8 @@ std::unique_ptr<AudioProcessing> CreateAPM(const uint8_t** data,
 
 void FuzzOneInput(const uint8_t* data, size_t size) {
   auto apm = CreateAPM(&data, &size);
-  FuzzAudioProcessing(data, size, std::move(apm));
+  if (apm) {
+    FuzzAudioProcessing(data, size, std::move(apm));
+  }
 }
 }  // namespace webrtc