diff --git a/test/tests/parallel/set1/spam_virus/undef_spam_subject.bats b/test/tests/parallel/set1/spam_virus/undef_spam_subject.bats
deleted file mode 100644
index c55a6dba..00000000
--- a/test/tests/parallel/set1/spam_virus/undef_spam_subject.bats
+++ /dev/null
@@ -1,60 +0,0 @@
-load "${REPOSITORY_ROOT}/test/helper/setup"
-load "${REPOSITORY_ROOT}/test/helper/common"
-
-BATS_TEST_NAME_PREFIX='[Spam] (undefined subject) '
-
-CONTAINER1_NAME='dms-test_spam-undef-subject_1'
-CONTAINER2_NAME='dms-test_spam-undef-subject_2'
-CONTAINER_NAME=${CONTAINER2_NAME}
-
-function teardown() { _default_teardown ; }
-
-@test "Empty 'SPAM_SUBJECT' should set correct value in Amavis config" {
-  export CONTAINER_NAME=${CONTAINER1_NAME}
-  local CUSTOM_SETUP_ARGUMENTS=(
-    --env ENABLE_AMAVIS=1
-    --env ENABLE_SPAMASSASSIN=1
-  )
-  _init_with_defaults
-  _common_container_setup 'CUSTOM_SETUP_ARGUMENTS'
-
-  _run_in_container_bash "grep '\$sa_spam_subject_tag' /etc/amavis/conf.d/20-debian_defaults | grep '= undef'"
-  assert_success
-}
-
-# TODO: Unclear why some of these ENV are relevant for the test?
-@test "Docker env variables are set correctly (custom)" {
-  export CONTAINER_NAME=${CONTAINER2_NAME}
-
-  local CUSTOM_SETUP_ARGUMENTS=(
-    --env ENABLE_CLAMAV=1
-    --env SPOOF_PROTECTION=1
-    --env ENABLE_SPAMASSASSIN=1
-    --env REPORT_RECIPIENT=user1@localhost.localdomain
-    --env REPORT_SENDER=report1@mail.my-domain.com
-    --env SA_TAG=-5.0
-    --env SA_TAG2=2.0
-    --env SA_KILL=3.0
-    --env SPAM_SUBJECT='SPAM: '
-    --env VIRUSMAILS_DELETE_DELAY=7
-    --env ENABLE_SRS=1
-    --env ENABLE_MANAGESIEVE=1
-    --env PERMIT_DOCKER=host
-    # NOTE: ulimit required for `ENABLE_SRS=1` until running a newer `postsrsd`
-    --ulimit "nofile=$(ulimit -Sn):$(ulimit -Hn)"
-  )
-  _init_with_defaults
-  _common_container_setup 'CUSTOM_SETUP_ARGUMENTS'
-
-  _run_in_container_bash "grep '\$sa_tag_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= -5.0'"
-  assert_success
-
-  _run_in_container_bash "grep '\$sa_tag2_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 2.0'"
-  assert_success
-
-  _run_in_container_bash "grep '\$sa_kill_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 3.0'"
-  assert_success
-
-  _run_in_container_bash "grep '\$sa_spam_subject_tag' /etc/amavis/conf.d/20-debian_defaults | grep '= .SPAM: .'"
-  assert_success
-}