diff --git a/wally/suits/io/long_test.cfg b/wally/suits/io/long_test.cfg
index a59c360..fd420d8 100644
--- a/wally/suits/io/long_test.cfg
+++ b/wally/suits/io/long_test.cfg
@@ -1,5 +1,8 @@
 [defaults]
 
+# this is critical for correct results in multy-node run
+randrepeat=0
+
 # 24h test
 NUM_ROUNDS1=270
 NUM_ROUNDS2=261