diff --git a/test/test b/test/test
index 85f7df4..cac537b 100755
--- a/test/test
+++ b/test/test
@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
 
-# TODO: exit with non-zero status code when tests fail.
-
 
 # Clean up.
 rm -f *.actual
@@ -42,3 +40,5 @@ echo "$((count_ok + count_fail)) tests"
 echo "$count_ok ok"
 echo "$count_fail failed"
 
+exit $count_fail
+