diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index fb9e50f99..e89e5ea27 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1886,7 +1886,10 @@ component_check_python_files () {
 
 component_check_generate_test_code () {
     msg "uint test: generate_test_code.py"
-    record_status ./tests/scripts/test_generate_test_code.py
+    # unittest writes out mundane stuff like number or tests run on stderr.
+    # Our convention is to reserve stderr for actual errors, and write
+    # harmless info on stdout so it can be suppress with --quiet.
+    record_status ./tests/scripts/test_generate_test_code.py 2>&1
 }
 
 ################################################################