diff --git a/Dockerfile b/Dockerfile
index e0dcdf4..caf96ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,7 +43,7 @@ COPY samba.sh /usr/bin/
 EXPOSE 137/udp 138/udp 139 445
 
 HEALTHCHECK --interval=60s --timeout=15s \
-             CMD smbclient -L '\\localhost\' -U 'guest%' -m SMB3
+             CMD smbclient -L '\\localhost' -U '%' -m SMB3
 
 VOLUME ["/etc/samba"]
 
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 2cda3a1..59d061f 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -45,7 +45,7 @@ COPY samba.sh /usr/bin/
 EXPOSE 137/udp 138/udp 139 445
 
 HEALTHCHECK --interval=60s --timeout=15s \
-             CMD smbclient -L '\\localhost\' -U 'guest%' -m SMB3
+             CMD smbclient -L '\\localhost' -U '%' -m SMB3
 
 VOLUME ["/etc/samba"]
 
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index a7f2160..9f4b061 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -45,7 +45,7 @@ COPY samba.sh /usr/bin/
 EXPOSE 137/udp 138/udp 139 445
 
 HEALTHCHECK --interval=60s --timeout=15s \
-             CMD smbclient -L '\\localhost\' -U 'guest%' -m SMB3
+             CMD smbclient -L '\\localhost' -U '%' -m SMB3
 
 VOLUME ["/etc/samba"]