diff --git a/engine/libtest.go b/engine/libtest.go
index 902f6a660..11b17a3e2 100644
--- a/engine/libtest.go
+++ b/engine/libtest.go
@@ -105,7 +105,7 @@ func StartEngine(cfgPath string, waitEngine int) (*exec.Cmd, error) {
 	if !connected {
 		return nil, fmt.Errorf("engine did not open port <%s>", cfg.ListenCfg().RPCJSONListen)
 	}
-	time.Sleep(100 * time.Millisecond) // wait for rater to register all subsistems
+	time.Sleep(time.Duration(waitEngine) * time.Millisecond) // wait for rater to register all subsistems
 	return engine, nil
 }