diff --git a/system/t03_help/MirrorCreateHelpTest_gold b/system/t03_help/MirrorCreateHelpTest_gold
index 1816e6d3..c0cc3886 100644
--- a/system/t03_help/MirrorCreateHelpTest_gold
+++ b/system/t03_help/MirrorCreateHelpTest_gold
@@ -21,7 +21,7 @@ Options:
   -dep-follow-source: when processing dependencies, follow from binary to Source packages
   -dep-follow-suggests: when processing dependencies, follow Suggests
   -dep-verbose-resolve: when processing dependencies, print detailed logs
-  -filter="": filter packages in mirror
+  -filter=: filter packages in mirror, use '@file' to read filter from file or '@-' for stdin
   -filter-with-deps: when filtering, include dependencies of matching packages as well
   -force-architectures: (only with architecture list) skip check that requested architectures are listed in Release file
   -force-components: (only with component list) skip check that requested components are listed in Release file
diff --git a/system/t03_help/MirrorCreateTest_gold b/system/t03_help/MirrorCreateTest_gold
index 74502216..30bcfd86 100644
--- a/system/t03_help/MirrorCreateTest_gold
+++ b/system/t03_help/MirrorCreateTest_gold
@@ -12,7 +12,7 @@ Options:
   -dep-follow-source: when processing dependencies, follow from binary to Source packages
   -dep-follow-suggests: when processing dependencies, follow Suggests
   -dep-verbose-resolve: when processing dependencies, print detailed logs
-  -filter="": filter packages in mirror
+  -filter=: filter packages in mirror, use '@file' to read filter from file or '@-' for stdin
   -filter-with-deps: when filtering, include dependencies of matching packages as well
   -force-architectures: (only with architecture list) skip check that requested architectures are listed in Release file
   -force-components: (only with component list) skip check that requested components are listed in Release file
diff --git a/system/t03_help/WrongFlagTest_gold b/system/t03_help/WrongFlagTest_gold
index 4dc0cb19..fb928b1e 100644
--- a/system/t03_help/WrongFlagTest_gold
+++ b/system/t03_help/WrongFlagTest_gold
@@ -13,7 +13,7 @@ Options:
   -dep-follow-source: when processing dependencies, follow from binary to Source packages
   -dep-follow-suggests: when processing dependencies, follow Suggests
   -dep-verbose-resolve: when processing dependencies, print detailed logs
-  -filter="": filter packages in mirror
+  -filter=: filter packages in mirror, use '@file' to read filter from file or '@-' for stdin
   -filter-with-deps: when filtering, include dependencies of matching packages as well
   -force-architectures: (only with architecture list) skip check that requested architectures are listed in Release file
   -force-components: (only with component list) skip check that requested components are listed in Release file