diff --git a/tests/pySim-prog_test.sh b/tests/pySim-prog_test.sh
index f518618..28d9777 100755
--- a/tests/pySim-prog_test.sh
+++ b/tests/pySim-prog_test.sh
@@ -25,6 +25,7 @@
 TEMPFILE=temp.tmp
 PYTHON=python3
 
+export PYSIM_INTEGRATION_TEST=1
 set -e
 
 echo "pySim-prog_test - a test program to test pySim-prog.py"