diff --git a/run-tests.sh b/run-tests.sh
index 927897a..919a85e 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -5,6 +5,11 @@ OUTPUT=`mktemp`
 LOGFILE=tests.log
 CMD=./figlet
 
+if [ -n "$1" ]; then
+	FONTDIR="-d $1"
+	CMD="$CMD $FONTDIR"
+fi
+
 run_test() {
 	test_num=$1
 	test_dsc=$2
@@ -37,7 +42,7 @@ echo -n "Default font dir: "; $CMD -I2
 echo -n "Default font: "; $CMD -I3
 echo
 
-run_test 001 "showfigfonts output" "./showfigfonts"
+run_test 001 "showfigfonts output" "./showfigfonts $FONTDIR"
 run_test 002 "text rendering in all fonts" \
   "for i in fonts/*.flf; do $cmd -f \$i; done"
 run_test 003 "long text rendering" "cat tests/longtext.txt|./figlet"