1 files changed, 1 insertions, 1 deletions

diff --git a/test/fnetfilter/fnetfilter.sh b/test/fnetfilter/fnetfilter.sh
index 9ad822753..52f921232 100755
--- a/test/fnetfilter/fnetfilter.sh
+++ b/test/fnetfilter/fnetfilter.sh
@@ -7,7 +7,7 @@ export MALLOC_CHECK_=3
 export MALLOC_PERTURB_=$(($RANDOM % 255 + 1))
 export LC_ALL=C
 
-if [ -f /etc/debian_version ]; then
+if [[ -f /etc/debian_version ]]; then
         libdir=$(dirname "$(dpkg -L firejail | grep fcopy)")
         export PATH="$PATH:$libdir"
 fi