diff --git a/sysuser-tools.changes b/sysuser-tools.changes
index 2c28104..cc54f6d 100644
--- a/sysuser-tools.changes
+++ b/sysuser-tools.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Thu Jul 15 06:45:15 UTC 2021 - Thorsten Kukuk <kukuk@suse.com>
+
+- Use /bin/bash for sysusers-generate-pre
+
+-------------------------------------------------------------------
+Tue Jun 29 13:08:44 UTC 2021 - Dan Čermák <dcermak@suse.com>
+
+- Remove usage of grep from sysusers-generate-pre
+- Add a simple test of sysusers-generate-pre to %check
+
 -------------------------------------------------------------------
 Mon Jun 21 09:56:17 UTC 2021 - Dominique Leuenberger <dimstar@opensuse.org>
 
diff --git a/sysuser-tools.spec b/sysuser-tools.spec
index 0a1962b..7441409 100644
--- a/sysuser-tools.spec
+++ b/sysuser-tools.spec
@@ -31,6 +31,7 @@ BuildArch:      noarch
 Requires:       sysuser-shadow
 #!BuildIgnore:  sysuser-shadow
 #!BuildIgnore:  sysuser-tools
+BuildRequires:  diffutils
 
 %description
 Generate auto provides for system users.
@@ -65,6 +66,30 @@ install -D -m 755 %{SOURCE2} %{buildroot}%{_prefix}/lib/rpm/sysusers-generate-pr
 install -D -m 644 %{SOURCE3} %{buildroot}%{_rpmmacrodir}/macros.sysusers
 install -D -m 755 %{SOURCE4} %{buildroot}%{_sbindir}/sysusers2shadow
 
+%check
+mkdir -p subdir
+cat <<EOF > subdir/me.conf
+# Type Name       ID     GECOS           [HOME]    Shell
+  u   me   -     "myself" /dev/null
+m   me  nogroup
+# foobar
+  g   asdf
+ z     welp invalid
+EOF
+
+cat <<EOFF > expected-account-pre
+/usr/sbin/sysusers2shadow me.conf <<"EOF" || [ -f /.buildenv ]
+u   me   -     "myself" /dev/null
+m   me  nogroup
+g   asdf
+EOF
+EOFF
+
+# copy pasta from macros.sysusers because the script sysusers-generate-pre is not in /usr/lib/rpm yet
+sh %{SOURCE2} $(pwd)/subdir/me.conf me.conf > account.pre
+
+diff account.pre expected-account-pre
+
 %files
 %defattr(-,root,root)
 %{_rpmmacrodir}/macros.sysusers
diff --git a/sysusers-generate-pre b/sysusers-generate-pre
index d664bcb..824ba71 100644
--- a/sysusers-generate-pre
+++ b/sysusers-generate-pre
@@ -1,6 +1,6 @@
-#!/bin/sh
+#!/bin/bash
 # pass systemd sysusers config paths as argument to this script.
 
 echo "/usr/sbin/sysusers2shadow $2 <<\"EOF\" || [ -f /.buildenv ]"
-grep -he '^[ugmr]' "$1"
+(while read -r line; do if [[ $line =~ ^\s*[ugmr] ]]; then echo "$line"; fi; done) < "$1"
 echo 'EOF'