diff --git a/compose.yaml b/compose.yaml
index 8f5bfdb2..2d5491d9 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -25,6 +25,6 @@ services:
     # cap_add:
     #   - NET_ADMIN
     healthcheck:
-      test: "ss --listening --tcp | grep -P 'LISTEN.+:smtp' || exit 1"
+      test: "ss --listening --ipv4 --tcp | grep --silent ':smtp' || exit 1"
       timeout: 3s
       retries: 0
diff --git a/test/tests/serial/tests.bats b/test/tests/serial/tests.bats
index eff151df..fee78306 100644
--- a/test/tests/serial/tests.bats
+++ b/test/tests/serial/tests.bats
@@ -25,7 +25,7 @@ function setup_file() {
     --env SPOOF_PROTECTION=1
     --env SSL_TYPE='snakeoil'
     --ulimit "nofile=$(ulimit -Sn):$(ulimit -Hn)"
-    --health-cmd "ss --listening --tcp | grep -P 'LISTEN.+:smtp' || exit 1"
+    --health-cmd "ss --listening --ipv4 --tcp | grep --silent ':smtp' || exit 1"
   )
   _common_container_setup 'CONTAINER_ARGS_ENV_CUSTOM'