diff --git a/test/helper/common.bash b/test/helper/common.bash
index c6abbd76..35f41283 100644
--- a/test/helper/common.bash
+++ b/test/helper/common.bash
@@ -425,5 +425,13 @@ function _file_exists_in_container() {
   assert_success
 }
 
+# A simple wrapper for a test that checks whether a file does not exist.
+#
+# @param ${1} = the path to the file (that should not exists) inside the container
+function _file_does_not_exist_in_container() {
+  _run_in_container_bash "[[ -f ${1} ]]"
+  assert_failure
+}
+
 # ? << Miscellaneous helper functions
 # ! -------------------------------------------------------------------
diff --git a/test/tests/parallel/set1/spam_virus/amavis.bats b/test/tests/parallel/set1/spam_virus/amavis.bats
index bf2841b1..42d027dc 100644
--- a/test/tests/parallel/set1/spam_virus/amavis.bats
+++ b/test/tests/parallel/set1/spam_virus/amavis.bats
@@ -45,8 +45,7 @@ function teardown_file() {
   _run_in_container grep -F '127.0.0.1:10025' /etc/postfix/master.cf
   assert_success
 
-  _run_in_container_bash '[[ ! -f /etc/cron.d/amavisd-new.disabled ]]'
-  assert_success
+  _file_does_not_exist_in_container /etc/cron.d/amavisd-new.disabled
   _file_exists_in_container /etc/cron.d/amavisd-new
 }
 
@@ -93,6 +92,5 @@ function teardown_file() {
   assert_failure
 
   _file_exists_in_container /etc/cron.d/amavisd-new.disabled
-  _run_in_container_bash '[[ ! -f /etc/cron.d/amavisd-new ]]'
-  assert_success
+  _file_does_not_exist_in_container /etc/cron.d/amavisd-new
 }
diff --git a/test/tests/parallel/set1/spam_virus/rspamd_dkim.bats b/test/tests/parallel/set1/spam_virus/rspamd_dkim.bats
index 044e38fb..20939f03 100644
--- a/test/tests/parallel/set1/spam_virus/rspamd_dkim.bats
+++ b/test/tests/parallel/set1/spam_virus/rspamd_dkim.bats
@@ -62,8 +62,7 @@ function teardown_file() { _default_teardown ; }
   assert_output --partial "Supplying a default configuration (to '${SIGNING_CONF_FILE}')"
   refute_output --partial "'${SIGNING_CONF_FILE}' exists, not supplying a default"
   assert_output --partial "Finished DKIM key creation"
-  _run_in_container_bash "[[ -f ${SIGNING_CONF_FILE} ]]"
-  assert_success
+  _file_exists_in_container "${SIGNING_CONF_FILE}"
   _exec_in_container_bash "echo 'blabla' >${SIGNING_CONF_FILE}"
   local INITIAL_SHA512_SUM=$(_exec_in_container sha512sum "${SIGNING_CONF_FILE}")
 
@@ -87,8 +86,7 @@ function teardown_file() { _default_teardown ; }
   assert_success
 
   _count_files_in_directory_in_container /tmp/docker-mailserver/rspamd/dkim/ 3
-  _run_in_container_bash "[[ -f ${SIGNING_CONF_FILE} ]]"
-  assert_success
+  _file_exists_in_container "${SIGNING_CONF_FILE}"
 
   __check_path_in_signing_config "/tmp/docker-mailserver/rspamd/dkim/rsa-2048-mail-${DOMAIN_NAME}.private.txt"
   __check_selector_in_signing_config 'mail'
@@ -241,8 +239,7 @@ function __check_rsa_keys() {
 function __check_key_files_are_present() {
   local BASE_FILE_NAME="${1:?Base file name must be supplied to __check_key_files_are_present}"
   for FILE in ${BASE_FILE_NAME}.{public.txt,public.dns.txt,private.txt}; do
-    _run_in_container_bash "[[ -f ${FILE} ]]"
-    assert_success
+    _file_exists_in_container "${FILE}"
   done
 }
 
diff --git a/test/tests/parallel/set1/spam_virus/rspamd_partly.bats b/test/tests/parallel/set1/spam_virus/rspamd_partly.bats
index 87c5a7c8..b647f562 100644
--- a/test/tests/parallel/set1/spam_virus/rspamd_partly.bats
+++ b/test/tests/parallel/set1/spam_virus/rspamd_partly.bats
@@ -65,8 +65,7 @@ function teardown_file() { _default_teardown ; }
 
 @test 'learning is properly disabled' {
   for FILE in learn-{ham,spam}.{sieve,svbin}; do
-    _run_in_container_bash "[[ -f /usr/lib/dovecot/sieve-pipe/${FILE} ]]"
-    assert_failure
+    _file_does_not_exist_in_container "/usr/lib/dovecot/sieve-pipe/${FILE}"
   done
 
   _run_in_container grep 'mail_plugins.*imap_sieve' /etc/dovecot/conf.d/20-imap.conf
@@ -84,14 +83,13 @@ function teardown_file() { _default_teardown ; }
 }
 
 @test 'hfilter group module configuration is deleted' {
-  _run_in_container_bash '[[ -f /etc/rspamd/local.d/hfilter_group.conf ]]'
+  _file_does_not_exist_in_container /etc/rspamd/local.d/hfilter_group.conf
   assert_failure
 }
 
 @test 'checks on authenticated users are enabled' {
   local MODULE_FILE='/etc/rspamd/local.d/settings.conf'
-  _run_in_container_bash "[[ -f ${MODULE_FILE} ]]"
-  assert_success
+  _file_exists_in_container "${MODULE_FILE}"
 
   _run_in_container grep -E 'authenticated \{' "${MODULE_FILE}"
   assert_failure