diff --git a/modules/audio_processing/BUILD.gn b/modules/audio_processing/BUILD.gn
index 6e9f584c75..2c7b73b12d 100644
--- a/modules/audio_processing/BUILD.gn
+++ b/modules/audio_processing/BUILD.gn
@@ -542,6 +542,7 @@ if (rtc_include_tests) {
         "../../rtc_base:task_queue_for_test",
         "../../rtc_base/system:file_wrapper",
         "../../system_wrappers",
+        "../../system_wrappers:field_trial",
         "../../test:test_support",
         "aec_dump",
         "aec_dump:aec_dump_impl",
diff --git a/modules/audio_processing/test/audioproc_float_impl.cc b/modules/audio_processing/test/audioproc_float_impl.cc
index a37856ecdf..d9a4227eb7 100644
--- a/modules/audio_processing/test/audioproc_float_impl.cc
+++ b/modules/audio_processing/test/audioproc_float_impl.cc
@@ -27,6 +27,7 @@
 #include "modules/audio_processing/test/wav_based_simulator.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/strings/string_builder.h"
+#include "system_wrappers/include/field_trial.h"
 
 constexpr int kParameterNotSpecifiedValue = -10000;
 
@@ -256,6 +257,13 @@ ABSL_FLAG(bool,
           false,
           "Produce floating point wav output files.");
 
+ABSL_FLAG(std::string,
+          force_fieldtrials,
+          "",
+          "Field trials control experimental feature code which can be forced. "
+          "E.g. running with --force_fieldtrials=WebRTC-FooFeature/Enable/"
+          " will assign the group Enable to field trial WebRTC-FooFeature.");
+
 namespace webrtc {
 namespace test {
 namespace {
@@ -631,6 +639,11 @@ int AudioprocFloatImpl(std::unique_ptr<AudioProcessingBuilder> ap_builder,
     return 1;
   }
 
+  // InitFieldTrialsFromString stores the char*, so the char array must
+  // outlive the application.
+  const std::string field_trials = absl::GetFlag(FLAGS_force_fieldtrials);
+  webrtc::field_trial::InitFieldTrialsFromString(field_trials.c_str());
+
   SimulationSettings settings = CreateSettings();
   if (!input_aecdump.empty()) {
     settings.aec_dump_input_string = input_aecdump;