diff --git a/tests/bin/run-tests-docker.sh b/tests/bin/run-tests-docker.sh
index afcd42c22..84c7de19f 100755
--- a/tests/bin/run-tests-docker.sh
+++ b/tests/bin/run-tests-docker.sh
@@ -1,10 +1,11 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
+
 set -eu
 unset CDPATH
-cd "$( dirname "${BASH_SOURCE[0]}" )/../.."
+cd "$( dirname "$0" )/../.."
 
 
-function usage() {
+usage() {
 cat >&2 <<EOF
 Build scitran-core image and run tests in a docker container
 
@@ -20,11 +21,11 @@ EOF
 }
 
 
-function main() {
+main() {
     local DOCKER_BUILD=true
     local TEST_ARGS=
 
-    while [[ "$#" > 0 ]]; do
+    while [ $# -gt 0 ]; do
         case "$1" in
             -B|--no-build)    DOCKER_BUILD=false;              ;;
             -h|--help)        usage;                    exit 0 ;;
@@ -56,14 +57,14 @@ function main() {
         -e SCITRAN_PERSISTENT_DB_URI=mongodb://scitran-core-test-mongo:27017/scitran \
         -e SCITRAN_PERSISTENT_DB_LOG_URI=mongodb://scitran-core-test-mongo:27017/logs \
         -v $(pwd):/var/scitran/code/api \
-        --entrypoint bash \
+        --entrypoint sh \
         scitran-core:run-tests \
         /var/scitran/code/api/tests/bin/run-tests-ubuntu.sh \
         $TEST_ARGS
 }
 
 
-function clean_up() {
+clean_up() {
     local TEST_RESULT_CODE=$?
     set +e
 
diff --git a/tests/bin/run-tests-ubuntu.sh b/tests/bin/run-tests-ubuntu.sh
index 8c7d94fa5..00af432d1 100755
--- a/tests/bin/run-tests-ubuntu.sh
+++ b/tests/bin/run-tests-ubuntu.sh
@@ -1,10 +1,11 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
+
 set -eu
 unset CDPATH
 cd "$( dirname "${BASH_SOURCE[0]}" )/../.."
 
 
-function usage() {
+usage() {
 cat >&2 <<EOF
 Run scitran-core tests
 
@@ -35,7 +36,7 @@ EOF
 }
 
 
-function main() {
+main() {
     export RUN_ALL=true
     local RUN_LINT=false
     local RUN_UNIT=false
@@ -43,7 +44,7 @@ function main() {
     local RUN_ABAO=false
     local PYTEST_ARGS=
 
-    while [[ "$#" > 0 ]]; do
+    while [ $# -gt 0 ]; do
         case "$1" in
             -l|--lint)      RUN_ALL=false; RUN_LINT=true      ;;
             -u|--unit)      RUN_ALL=false; RUN_UNIT=true      ;;
@@ -158,14 +159,14 @@ function main() {
 }
 
 
-function clean_up () {
+clean_up() {
     local TEST_RESULT_CODE=$?
     set +e
 
     echo
     echo "Test return code = $TEST_RESULT_CODE"
 
-    if [[ -n "${API_PID:-}" ]]; then
+    if [ "${API_PID:-}" ]; then
         # Killing uwsgi
         kill $API_PID
         wait 2> /dev/null