diff --git a/test.sh b/test.sh
index 59345f6..8120960 100755
--- a/test.sh
+++ b/test.sh
@@ -1,7 +1,12 @@
 #!/bin/sh
-bin=$PWD/realpath.sh
-ref="readlink -f"
-#ref="busybox readlink -f"
+# Give in the command to test against as argument(s)
+# Examples: ./test.sh readlink -f
+#           ./test.sh cat
+#           ./test.sh ./otherscript.sh
+
+bin="$@"
+[ -z "$bin" ] && bin=$PWD/realpath.sh
+
 dir="$(mktemp -d)"
 cd "$dir"