diff --git a/sh/tests/cl-camp1_test.sh b/sh/tests/cl-camp1_test.sh
index 808238460..923059101 100755
--- a/sh/tests/cl-camp1_test.sh
+++ b/sh/tests/cl-camp1_test.sh
@@ -8,8 +8,8 @@ IFS='
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/mastertheLS)
-	expected=$(cd "$1" && "$script_dirS"/solutions/mastertheLS)
+	submitted=$(cd "$1" && bash "$script_dirS"/student/mastertheLS)
+	expected=$(cd "$1" && bash "$script_dirS"/solutions/mastertheLS)
 
 	diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/cl-camp3_test.sh b/sh/tests/cl-camp3_test.sh
index 00a5cba41..26a09150b 100755
--- a/sh/tests/cl-camp3_test.sh
+++ b/sh/tests/cl-camp3_test.sh
@@ -8,8 +8,8 @@ IFS='
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/look)
-	expected=$(cd "$1" && "$script_dirS"/solutions/look)
+	submitted=$(cd "$1" && bash "$script_dirS"/student/look)
+	expected=$(cd "$1" && bash "$script_dirS"/solutions/look)
 
 	diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/cl-camp4_test.sh b/sh/tests/cl-camp4_test.sh
index fe38c7025..c7dd907ce 100755
--- a/sh/tests/cl-camp4_test.sh
+++ b/sh/tests/cl-camp4_test.sh
@@ -9,8 +9,8 @@ echo insecure >> ~/.curlrc
 caddy start &>/dev/null
 
 challenge() {
-	submitted=$(./student/myfamily.sh)
-	expected=$(./solutions/myfamily.sh)
+	submitted=$(bash student/myfamily.sh)
+	expected=$(bash solutions/myfamily.sh)
 
 	diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/cl-camp5_test.sh b/sh/tests/cl-camp5_test.sh
index de406c3d2..b141b1138 100755
--- a/sh/tests/cl-camp5_test.sh
+++ b/sh/tests/cl-camp5_test.sh
@@ -8,8 +8,8 @@ IFS='
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/lookagain.sh)
-	expected=$(cd "$1" && "$script_dirS"/solutions/lookagain.sh)
+	submitted=$(cd "$1" && bash "$script_dirS"/student/lookagain.sh)
+	expected=$(cd "$1" && bash "$script_dirS"/solutions/lookagain.sh)
 
 	diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/cl-camp6_test.sh b/sh/tests/cl-camp6_test.sh
index 6e1b76020..3c0faa6a6 100755
--- a/sh/tests/cl-camp6_test.sh
+++ b/sh/tests/cl-camp6_test.sh
@@ -8,8 +8,8 @@ IFS='
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/countfiles.sh)
-	expected=$(cd "$1" && "$script_dirS"/solutions/countfiles.sh)
+	submitted=$(cd "$1" && bash "$script_dirS"/student/countfiles.sh)
+	expected=$(cd "$1" && bash "$script_dirS"/solutions/countfiles.sh)
 
 	diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/cl-camp8_test.sh b/sh/tests/cl-camp8_test.sh
index c40837f0a..3391a2df4 100755
--- a/sh/tests/cl-camp8_test.sh
+++ b/sh/tests/cl-camp8_test.sh
@@ -7,7 +7,7 @@ IFS='
 
 cd cl-camp8
 
-submitted=$(../student/skip.sh)
-expected=$(../solutions/skip.sh)
+submitted=$(bash ../student/skip.sh)
+expected=$(bash ../solutions/skip.sh)
 
 diff <(echo "$submitted") <(echo "$expected")
diff --git a/sh/tests/explain_test.sh b/sh/tests/explain_test.sh
index c6e350f96..b5aeba026 100755
--- a/sh/tests/explain_test.sh
+++ b/sh/tests/explain_test.sh
@@ -5,8 +5,8 @@ set -euo pipefail
 IFS='
 '
 
-submitted=$(student/explain.sh)
-expected=$(solutions/explain.sh)
+submitted=$(bash student/explain.sh)
+expected=$(bash solutions/explain.sh)
 
 if ! diff -q <(echo "$submitted") <(echo "$expected") &>/dev/null; then
 	echo "Wrong answer, detective."
diff --git a/sh/tests/now-get-to-work_test.sh b/sh/tests/now-get-to-work_test.sh
index 7313f2e1f..efe236a38 100755
--- a/sh/tests/now-get-to-work_test.sh
+++ b/sh/tests/now-get-to-work_test.sh
@@ -5,8 +5,8 @@ set -euo pipefail
 IFS='
 '
 
-submitted=$(student/my_answer.sh)
-expected=$(solutions/my_answer.sh)
+submitted=$(bash student/my_answer.sh)
+expected=$(bash solutions/my_answer.sh)
 
 if ! diff -q <(echo "$submitted") <(echo "$expected") &>/dev/null; then
 	echo "Wrong answer, detective."
diff --git a/sh/tests/teacher_test.sh b/sh/tests/teacher_test.sh
index 4dde58bed..ca8153fcd 100755
--- a/sh/tests/teacher_test.sh
+++ b/sh/tests/teacher_test.sh
@@ -7,10 +7,9 @@ IFS='
 
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
-
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/teacher.sh) || (echo "Your script exited with a non-zero status code"; exit 1)
-	expected=$(cd "$1" && "$script_dirS"/solutions/teacher.sh)
+	submitted=$(cd "$1" && bash "$script_dirS"/student/teacher.sh) || (echo "Your script exited with a non-zero status code"; exit 1)
+	expected=$(cd "$1" && bash "$script_dirS"/solutions/teacher.sh)
 
 	if ! diff -q <(echo "$submitted") <(echo "$expected") &>/dev/null; then
 		echo "??? What ?? Wrong answer, teacher. Did you really do the job previously? Or was is just an \"echo\" of luck??"