diff --git a/webrtc/BUILD.gn b/webrtc/BUILD.gn
index 1f7f52104a..9857423f30 100644
--- a/webrtc/BUILD.gn
+++ b/webrtc/BUILD.gn
@@ -785,6 +785,12 @@ if (rtc_include_tests) {
       ":rtc_unittests_config",
     ]
     public_configs = [ ":common_inherited_config" ]
+
+    if (!is_debug) {
+      configs -= [ "//build/config/compiler:default_optimization" ]
+      configs += [ "//build/config/compiler:optimize_max" ]
+    }
+
     sources = [
       "call/call_perf_tests.cc",
       "call/rampup_tests.cc",
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 27c1060e44..1dbc929e8f 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -1140,6 +1140,11 @@ if (rtc_include_tests) {
     configs += [ "../..:common_config" ]
     public_configs = [ "../..:common_inherited_config" ]
 
+    if (!is_debug) {
+      configs -= [ "//build/config/compiler:default_optimization" ]
+      configs += [ "//build/config/compiler:optimize_max" ]
+    }
+
     if (is_clang) {
       # Suppress warnings from the Chromium Clang plugins (bugs.webrtc.org/163).
       configs -= [ "//build/config/clang:find_bad_constructs" ]