diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index 9c6ef75e53..0d5b53f2f4 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -2027,16 +2027,6 @@ if (rtc_include_tests) {
     }
   }
 
-  config("isac_test_warnings_config") {
-    if (is_win && is_clang) {
-      cflags = [
-        # Disable warnings failing when compiling with Clang on Windows.
-        # https://bugs.chromium.org/p/webrtc/issues/detail?id=5366
-        "-Wno-format",
-      ]
-    }
-  }
-
   rtc_source_set("isac_test_util") {
     testonly = true
     sources = [
@@ -2063,8 +2053,6 @@ if (rtc_include_tests) {
       ":isac_test_util",
       "../../rtc_base:rtc_base_approved",
     ]
-
-    configs += [ ":isac_test_warnings_config" ]
   }
 
   rtc_executable("g711_test") {
diff --git a/modules/audio_coding/codecs/isac/main/test/simpleKenny.c b/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
index 691d0ca710..4b48b5033a 100644
--- a/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
+++ b/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
@@ -416,7 +416,7 @@ int main(int argc, char* argv[]) {
   printf("Rate Limit.................. %d bits/sec \n", rateLimit);
 
 #ifdef WIN32
-  fprintf(bitrateFile, "%d  %10u     %d     %6.3f  %6.3f    %6.3f\n",
+  fprintf(bitrateFile, "%d  %10lu     %d     %6.3f  %6.3f    %6.3f\n",
           sampFreqKHz, framecnt, bottleneck, rateLB, rateUB, rate);
   fclose(bitrateFile);
 #endif  // WIN32