diff --git a/tests/various/clk2fflogic_effects.sh b/tests/various/clk2fflogic_effects.sh
index b51424d1b..bb33e2926 100755
--- a/tests/various/clk2fflogic_effects.sh
+++ b/tests/various/clk2fflogic_effects.sh
@@ -20,8 +20,8 @@ iverilog -g2012 -o clk2fflogic_effects.iv.out clk2fflogic_effects.sv
 ./clk2fflogic_effects.iv.out > clk2fflogic_effects.iv.log
 
 sort clk2fflogic_effects.iv.log > clk2fflogic_effects.iv.sorted.log
-tail +3 clk2fflogic_effects.sim.log | sort > clk2fflogic_effects.sim.sorted.log
-tail +3 clk2fflogic_effects.clk2fflogic.log | sort > clk2fflogic_effects.clk2fflogic.sorted.log
+tail -n +3 clk2fflogic_effects.sim.log | sort > clk2fflogic_effects.sim.sorted.log
+tail -n +3 clk2fflogic_effects.clk2fflogic.log | sort > clk2fflogic_effects.clk2fflogic.sorted.log
 
 cmp clk2fflogic_effects.iv.sorted.log clk2fflogic_effects.sim.sorted.log
 cmp clk2fflogic_effects.iv.sorted.log clk2fflogic_effects.clk2fflogic.sorted.log