diff --git a/Makefile b/Makefile
index 1ad53b4..efd28f3 100644
--- a/Makefile
+++ b/Makefile
@@ -267,33 +267,36 @@ load-test:
 	echo "Concurrent: $$CONCURRENT"; \
 	echo ""; \
 	START_TIME=$$(date +%s); \
-	seq 1 $$REQUESTS | xargs -P$$CONCURRENT -I{} bash -c ' \
-		LINE=$$((RANDOM % $(TOTAL_VOICES) + 1)); \
-		VOICE_SPEC=$$(sed -n "$${LINE}p" /tmp/load_test_voices.txt); \
-		MODEL=$$(echo $$VOICE_SPEC | cut -d: -f1); \
-		VOICE=$$(echo $$VOICE_SPEC | cut -d: -f2); \
+	seq 1 $$REQUESTS | xargs -P$$CONCURRENT -I{} bash -c " \
+		TOTAL_VOICES=\$$(wc -l < /tmp/load_test_voices.txt); \
+		LINE=\$$((RANDOM % \$$TOTAL_VOICES + 1)); \
+		VOICE_SPEC=\$$(sed -n \"\$${LINE}p\" /tmp/load_test_voices.txt); \
+		MODEL=\$$(echo \$$VOICE_SPEC | cut -d: -f1); \
+		VOICE=\$$(echo \$$VOICE_SPEC | cut -d: -f2); \
 		NUM={}; \
-		START=$$(date +%s%3N); \
+		START=\$$(date +%s%3N); \
 		if curl -s -X POST http://$(REMOTE_HOST):8000/v1/audio/speech \
-			-H "Content-Type: application/json" \
-			-d "{\"voice\":\"$$VOICE\",\"input\":\"Load test number $$NUM\"}" \
-			-o /tmp/load_test/request_$${NUM}.mp3 2>&1; then \
-			END=$$(date +%s%3N); \
-			DURATION=$$((END - START)); \
-			SIZE=$$(stat -c%s /tmp/load_test/request_$${NUM}.mp3 2>/dev/null || echo 0); \
-			printf "[%3d] %-20s %-25s %5dms %6d bytes\n" "$$NUM" "$$MODEL" "$$VOICE" "$$DURATION" "$$SIZE"; \
+			-H 'Content-Type: application/json' \
+			-d '{\"model\":\"'\$$MODEL'\",\"voice\":\"'\$$VOICE'\",\"input\":\"Load test number '\$$NUM'\"}' \
+			-o /tmp/load_test/request_\$${NUM}.mp3 2>&1; then \
+			END=\$$(date +%s%3N); \
+			DURATION=\$$((END - START)); \
+			SIZE=\$$(stat -c%s /tmp/load_test/request_\$${NUM}.mp3 2>/dev/null || echo 0); \
+			printf '[%3d] %-20s %-25s %5dms %6d bytes\n' \"\$$NUM\" \"\$$MODEL\" \"\$$VOICE\" \"\$$DURATION\" \"\$$SIZE\"; \
 		else \
-			printf "[%3d] %-20s %-25s FAILED\n" "$$NUM" "$$MODEL" "$$VOICE"; \
+			printf '[%3d] %-20s %-25s FAILED\n' \"\$$NUM\" \"\$$MODEL\" \"\$$VOICE\"; \
 		fi \
-	'; \
+	"; \
 	END_TIME=$$(date +%s); \
 	DURATION=$$((END_TIME - START_TIME)); \
 	SUCCESS=$$(ls /tmp/load_test/*.mp3 2>/dev/null | wc -l); \
+	VALID=$$(find /tmp/load_test -name '*.mp3' -size +1000c 2>/dev/null | wc -l); \
 	echo ""; \
 	echo "🎉 Load test complete!"; \
 	echo "   Total requests: $$REQUESTS"; \
-	echo "   Successful: $$SUCCESS"; \
-	echo "   Failed: $$((REQUESTS - SUCCESS))"; \
+	echo "   Files created: $$SUCCESS"; \
+	echo "   Valid audio (>1KB): $$VALID"; \
+	echo "   Failed: $$((REQUESTS - VALID))"; \
 	echo "   Duration: $${DURATION}s"; \
 	echo "   Avg: $$((DURATION * 1000 / REQUESTS))ms per request"; \
 	echo "   Throughput: $$((REQUESTS / DURATION)) req/s"; \