diff --git a/test-scripts/sh b/test-scripts/sh
index 480a546..b0e8f4a 100755
--- a/test-scripts/sh
+++ b/test-scripts/sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env sh
 
 set -e
-dir="$(cd "$(dirname "$_")" && pwd)"
+dir="$(cd "$(dirname "$0")" && pwd)"
 script="${dir}/../dist/ColorEcho.sh"
 . "${script}"