diff --git a/test-server/test-client.c b/test-server/test-client.c
index 3f7c8b830..e94dbed67 100644
--- a/test-server/test-client.c
+++ b/test-server/test-client.c
@@ -137,6 +137,7 @@ callback_lws_mirror(struct libwebsocket_context *context,
 						  LWS_SEND_BUFFER_POST_PADDING];
 	int l = 0;
 	int n;
+	unsigned int rands[4];
 
 	switch (reason) {
 
@@ -144,7 +145,8 @@ callback_lws_mirror(struct libwebsocket_context *context,
 
 		fprintf(stderr, "callback_lws_mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
 
-		mirror_lifetime = 10 + (random() & 1023);
+		libwebsockets_get_random(context, rands, sizeof(rands[0]));
+		mirror_lifetime = 10 + (rands[0] & 1023);
 		/* useful to test single connection stability */
 		if (longlived)
 			mirror_lifetime += 50000;
@@ -178,13 +180,15 @@ callback_lws_mirror(struct libwebsocket_context *context,
 
 	case LWS_CALLBACK_CLIENT_WRITEABLE:
 
-		for (n = 0; n < 1; n++)
+		for (n = 0; n < 1; n++) {
+			libwebsockets_get_random(context, rands, sizeof(rands));
 			l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
 					"c #%06X %d %d %d;",
-					(int)random() & 0xffffff,
-					(int)random() % 500,
-					(int)random() % 250,
-					(int)random() % 24);
+					(int)rands[0] & 0xffffff,
+					(int)rands[1] % 500,
+					(int)rands[2] % 250,
+					(int)rands[3] % 24);
+		}
 
 		n = libwebsocket_write(wsi,
 		   &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);