diff --git a/modules/pacing/alr_detector.cc b/modules/pacing/alr_detector.cc
index c26225162e..52fa2bc98e 100644
--- a/modules/pacing/alr_detector.cc
+++ b/modules/pacing/alr_detector.cc
@@ -24,6 +24,7 @@ const char AlrDetector::kScreenshareProbingBweExperimentName[] =
     "WebRTC-ProbingScreenshareBwe";
 const char AlrDetector::kStrictPacingAndProbingExperimentName[] =
     "WebRTC-StrictPacingAndProbing";
+const char kDefaultProbingScreenshareBweSettings[] = "1.0,2875,80,40,-60,3";
 
 AlrDetector::AlrDetector()
     : bandwidth_usage_percent_(kDefaultAlrBandwidthUsagePercent),
@@ -89,6 +90,14 @@ AlrDetector::ParseAlrSettingsFromFieldTrial(const char* experiment_name) {
     group_name.resize(group_name.length() - kIgnoredSuffix.length());
   }
 
+  if (experiment_name == kScreenshareProbingBweExperimentName) {
+    // This experiment is now default-on with fixed settings.
+    // TODO(sprang): Remove this kill-switch and clean up experiment code.
+    if (group_name != "Disabled") {
+      group_name = kDefaultProbingScreenshareBweSettings;
+    }
+  }
+
   if (group_name.empty())
     return ret;
 
diff --git a/modules/pacing/alr_detector_unittest.cc b/modules/pacing/alr_detector_unittest.cc
index 927015615c..506add506b 100644
--- a/modules/pacing/alr_detector_unittest.cc
+++ b/modules/pacing/alr_detector_unittest.cc
@@ -93,7 +93,7 @@ TEST_F(AlrDetectorTest, AlrDetection) {
 
   // Verify that ALR ends when usage is above 65%.
   SimulateOutgoingTrafficIn(&alr_detector_)
-      .ForTimeMs(1000)
+      .ForTimeMs(4000)
       .AtPercentOfEstimatedBitrate(100);
   EXPECT_FALSE(alr_detector_.GetApplicationLimitedRegionStartTime());
 }
@@ -116,7 +116,7 @@ TEST_F(AlrDetectorTest, ShortSpike) {
 
   // ALR ends when usage is above 65%.
   SimulateOutgoingTrafficIn(&alr_detector_)
-      .ForTimeMs(1000)
+      .ForTimeMs(3000)
       .AtPercentOfEstimatedBitrate(100);
   EXPECT_FALSE(alr_detector_.GetApplicationLimitedRegionStartTime());
 }
diff --git a/video/video_send_stream_tests.cc b/video/video_send_stream_tests.cc
index 52699db3c2..98a32cc858 100644
--- a/video/video_send_stream_tests.cc
+++ b/video/video_send_stream_tests.cc
@@ -3542,7 +3542,7 @@ TEST_F(VideoSendStreamTest, SendsKeepAlive) {
 TEST_F(VideoSendStreamTest, ConfiguresAlrWhenSendSideOn) {
   const std::string kAlrProbingExperiment =
       std::string(AlrDetector::kScreenshareProbingBweExperimentName) +
-      "/1.1,2875,85,20,-20,0/";
+      "/1.0,2875,80,40,-60,3/";
   test::ScopedFieldTrials alr_experiment(kAlrProbingExperiment);
   class PacingFactorObserver : public test::SendTest {
    public:
@@ -3607,7 +3607,7 @@ TEST_F(VideoSendStreamTest, ConfiguresAlrWhenSendSideOn) {
   };
 
   // Send-side bwe on, use pacing factor from |kAlrProbingExperiment| above.
-  PacingFactorObserver test_with_send_side(true, 1.1f);
+  PacingFactorObserver test_with_send_side(true, 1.0f);
   RunBaseTest(&test_with_send_side);
 
   // Send-side bwe off, use default pacing factor.