diff --git a/tests/scripts/test_16.sh b/tests/scripts/test_16.sh
index b97b377..921852c 100755
--- a/tests/scripts/test_16.sh
+++ b/tests/scripts/test_16.sh
@@ -13,4 +13,4 @@ nextflow main.nf -profile conda --name test_data \
     --lineage_mode
 
 test -s $output/test_data.assembly.pangolin.csv || { echo "Missing pangolin output file (lineage mode with vcf input)!"; exit 1; }
-assert_eq `wc -l $output/test_data.assembly.pangolin.csv` 2 "Wrong number of pangolin results"
\ No newline at end of file
+assert_eq $(wc -l $output/test_data.assembly.pangolin.csv) 2 "Wrong number of pangolin results"