diff --git a/test/testsuite-07.units/issue27953.service b/test/testsuite-07.units/issue27953.service
new file mode 100644
index 0000000000..f441067822
--- /dev/null
+++ b/test/testsuite-07.units/issue27953.service
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+[Unit]
+Description=This unit should not remain active once the shell process exits
+
+[Service]
+Type=oneshot
+ExecStart=sh -c 'sleep infinity & exit 0'
diff --git a/test/units/testsuite-07.issue-14566.sh b/test/units/testsuite-07.issue-14566.sh
index e17c3934c1..d4be5b53b4 100755
--- a/test/units/testsuite-07.issue-14566.sh
+++ b/test/units/testsuite-07.issue-14566.sh
@@ -13,8 +13,6 @@ if [[ -n "${ASAN_OPTIONS:-}" ]]; then
     exit 0
 fi
 
-systemd-analyze log-level debug
-
 systemctl start issue14566-repro
 sleep 4
 systemctl status issue14566-repro
@@ -28,4 +26,4 @@ sleep 4
 # I personally prefer to see 42.
 ps -p "$leaked_pid" && exit 42
 
-systemd-analyze log-level info
+exit 0
diff --git a/test/units/testsuite-07.issue-27953.sh b/test/units/testsuite-07.issue-27953.sh
new file mode 100755
index 0000000000..8659970a5f
--- /dev/null
+++ b/test/units/testsuite-07.issue-27953.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# Check if the unit doesn't remain in active state after the main PID exits
+# Issue: https://github.com/systemd/systemd/issues/27953
+
+systemctl start issue27953.service
+timeout 10 sh -c 'while systemctl is-active issue27953.service; do sleep .5; done'
+[[ "$(systemctl show -P ExitType issue27953.service)" == main ]]
diff --git a/test/units/testsuite-07.main-PID-change.sh b/test/units/testsuite-07.main-PID-change.sh
index 6d302452af..bd1144c6f2 100755
--- a/test/units/testsuite-07.main-PID-change.sh
+++ b/test/units/testsuite-07.main-PID-change.sh
@@ -8,8 +8,6 @@ set -o pipefail
 # shellcheck source=test/units/util.sh
 . "$(dirname "$0")"/util.sh
 
-systemd-analyze log-level debug
-
 # The main service PID should be the parent bash process
 MAINPID="${PPID:?}"
 test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
@@ -172,5 +170,3 @@ test "$(systemctl show -P Result test-true.scope)" = success
 systemctl start user@4711.service
 runas testuser systemd-run --scope --user --unit test-true.scope /bin/true
 test "$(systemctl show -P Result test-true.scope)" = success
-
-systemd-analyze log-level info
diff --git a/test/units/testsuite-07.mount-invalid-chars.sh b/test/units/testsuite-07.mount-invalid-chars.sh
index b70e621126..5a07d14d04 100755
--- a/test/units/testsuite-07.mount-invalid-chars.sh
+++ b/test/units/testsuite-07.mount-invalid-chars.sh
@@ -23,7 +23,7 @@ TMP_MOUNTINFO="$(mktemp)"
 
 cp /proc/1/mountinfo "$TMP_MOUNTINFO"
 # Add a mount entry with a "Unicode non-character" in it
-echo -ne '69 1 252:2 / /foo/mountinfo rw,relatime shared:1 - cifs //foo\ufffebar rw,seclabel\n' >>"$TMP_MOUNTINFO"
+LANG="C.UTF-8" printf '69 1 252:2 / /foo/mountinfo rw,relatime shared:1 - cifs //foo\ufffebar rw,seclabel\n' >>"$TMP_MOUNTINFO"
 mount --bind "$TMP_MOUNTINFO" /proc/1/mountinfo
 systemctl daemon-reload
 # On affected versions this would throw an error:
@@ -42,12 +42,12 @@ rm -f "$TMP_MOUNTINFO"
 # a) Unit generated from /etc/fstab
 [[ -e /etc/fstab ]] && cp -f /etc/fstab /tmp/fstab.bak
 
-echo -ne '//localhost/foo\ufffebar  /foo/fstab  cifs defaults 0 0\n' >/etc/fstab
+LANG="C.UTF-8" printf '//localhost/foo\ufffebar  /foo/fstab  cifs defaults 0 0\n' >/etc/fstab
 systemctl daemon-reload
 [[ "$(systemctl show -P UnitFileState foo-fstab.mount)" == bad ]]
 
 # b) Unit generated from /etc/fstab (but the invalid character is in options)
-echo -ne '//localhost/foobar  /foo/fstab/opt  cifs nosuid,a\ufffeb,noexec 0 0\n' >/etc/fstab
+LANG="C.UTF-8" printf '//localhost/foobar  /foo/fstab/opt  cifs nosuid,a\ufffeb,noexec 0 0\n' >/etc/fstab
 systemctl daemon-reload
 [[ "$(systemctl show -P UnitFileState foo-fstab-opt.mount)" == bad ]]
 rm -f /etc/fstab
@@ -57,14 +57,14 @@ systemctl daemon-reload
 
 # c) Mount unit
 mkdir -p /run/systemd/system
-echo -ne '[Mount]\nWhat=//localhost/foo\ufffebar\nWhere=/foo/unit\nType=cifs\nOptions=noexec\n' >/run/systemd/system/foo-unit.mount
+LANG="C.UTF-8" printf '[Mount]\nWhat=//localhost/foo\ufffebar\nWhere=/foo/unit\nType=cifs\nOptions=noexec\n' >/run/systemd/system/foo-unit.mount
 systemctl daemon-reload
 [[ "$(systemctl show -P UnitFileState foo-unit.mount)" == bad ]]
 rm -f /run/systemd/system/foo-unit.mount
 
 # d) Mount unit (but the invalid character is in Options=)
 mkdir -p /run/systemd/system
-echo -ne '[Mount]\nWhat=//localhost/foobar\nWhere=/foo/unit/opt\nType=cifs\nOptions=noexec,a\ufffeb,nosuid\n' >/run/systemd/system/foo-unit-opt.mount
+LANG="C.UTF-8" printf '[Mount]\nWhat=//localhost/foobar\nWhere=/foo/unit/opt\nType=cifs\nOptions=noexec,a\ufffeb,nosuid\n' >/run/systemd/system/foo-unit-opt.mount
 systemctl daemon-reload
 [[ "$(systemctl show -P UnitFileState foo-unit-opt.mount)" == bad ]]
 rm -f /run/systemd/system/foo-unit-opt.mount