diff --git a/t/fifotest.sh b/t/fifotest.sh
index 48f3ade..47c4c64 100644
--- a/t/fifotest.sh
+++ b/t/fifotest.sh
@@ -1,25 +1,27 @@
 # Script for running HEJ with FIFO
 
+set -eu
+
 FIFO=input.lhe.gz
 
 # Copy config file and change output file name
 cp analysis_config_simple.yml config_rivet.yml
 sed -i "s/analysis/analyses/g" config_rivet.yml
 sed -i "s/plugin:.*/  - rivet: MC_XS\n      output: analysis_rivet/g" config_rivet.yml
 
 # run fifo
 mkfifo $FIFO
 cat $1 >> $FIFO &
 $2 config_rivet.yml $FIFO
 rm $FIFO
 mv analysis_rivet.yoda analysis_fifo.yoda
 
 # run w/o fifo
 $2 config_rivet.yml $1
 mv analysis_rivet.yoda analysis_nofifo.yoda
 
 # make sure fails
 #sed -i "s/YODA/GROGU/g" analysis_fifo.yoda
 
 #compare
 diff analysis_fifo.yoda analysis_nofifo.yoda