diff --git a/dap_test.c b/dap_test.c
index 18d033a35a7bb951de57f0f53330586a888e8052..e4603b71d210ea96d5db7dc2690861a920a449a3 100644
--- a/dap_test.c
+++ b/dap_test.c
@@ -33,7 +33,7 @@ void benchmark_mgs_time(const char *test_name, int dt)
 {
     char buf[120];
     if(abs(dt) >= 1000) {
-        snprintf(buf, 120, "%s (%lf sec.)", test_name, dt * 1. / 1000);
+        snprintf(buf, 120, "(%.3lf sec.)", dt * 1. / 1000);
     }
     else {