diff --git a/sh/tests/introduction_test.sh b/sh/tests/introduction_test.sh
index 0266e003c..e79dc800f 100755
--- a/sh/tests/introduction_test.sh
+++ b/sh/tests/introduction_test.sh
@@ -5,7 +5,7 @@ set -euo pipefail
 IFS='
 '
 
-submitted=$(./student/hello.sh)
-expected=$(./solutions/hello.sh)
+submitted=$(bash student/hello.sh)
+expected=$(bash solutions/hello.sh)
 
 diff <(echo "$submitted") <(echo "$expected") | cat -t