diff --git a/tests/test-generated-hwdb.sh b/tests/test-generated-hwdb.sh
index 7e1af144..b23f17c2 100755
--- a/tests/test-generated-hwdb.sh
+++ b/tests/test-generated-hwdb.sh
@@ -1,12 +1,11 @@
-#!/usr/bin/env bash
-set -e
+#!/bin/sh -e
 
 if [ ! -x "$UDEV_HWDB" ]; then
     echo "E: UDEV_HWDB (${UDEV_HWDB}) unset or not executable."
     exit 1
 fi
 
-if [ "$UDEV_HWDB_CHECK_CONTENTS" == 1 ]; then
+if [ "$UDEV_HWDB_CHECK_CONTENTS" = 1 ]; then
     generated_rules=$(mktemp "${TMPDIR:-/tmp}/libfprint-XXXXXX.hwdb")
 else
     generated_rules=/dev/null