diff --git a/.gitignore b/.gitignore
index 30953ed..d58fae1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.o
 test
+!test/
 .ninja_deps
 .ninja_log
diff --git a/README.md b/README.md
index ed5e7ca..fecefd4 100644
--- a/README.md
+++ b/README.md
@@ -24,8 +24,7 @@ It is required that one file in your project defines the
 as with any other single-header library.
 
 An example for how to use readarg can be found in `test/test.c`. If you want to
-see how readarg represents options and operands, execute `test.sh` in the same
-directory.
+see how readarg represents options and operands, run `test.bash`.
 
 ## Terminology
 
diff --git a/test/test.sh b/test/test.bash
similarity index 79%
rename from test/test.sh
rename to test/test.bash
index fa50619..85a03b4 100755
--- a/test/test.sh
+++ b/test/test.bash
@@ -1,4 +1,7 @@
-#!/bin/sh
+#!/usr/bin/env bash
+
+cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null
+
 ./test \
 	-e a \
 	--expr b \