diff --git a/Koha/Filter/MARC/EmbedItemsAvailability.pm b/Koha/Filter/MARC/EmbedItemsAvailability.pm
index c3bb4a3d16..ac4eaee1d4 100644
--- a/Koha/Filter/MARC/EmbedItemsAvailability.pm
+++ b/Koha/Filter/MARC/EmbedItemsAvailability.pm
@@ -95,3 +95,5 @@ sub _processrecord {
 
     return $record;
 }
+
+1;
diff --git a/Koha/Filter/MARC/EmbedSeeFromHeadings.pm b/Koha/Filter/MARC/EmbedSeeFromHeadings.pm
index fa8472022d..9ed7b45bea 100644
--- a/Koha/Filter/MARC/EmbedSeeFromHeadings.pm
+++ b/Koha/Filter/MARC/EmbedSeeFromHeadings.pm
@@ -105,3 +105,5 @@ sub _processrecord {
     }
     return $record;
 }
+
+1;
diff --git a/Koha/Filter/MARC/Null.pm b/Koha/Filter/MARC/Null.pm
index 476630ccef..dc5a016934 100644
--- a/Koha/Filter/MARC/Null.pm
+++ b/Koha/Filter/MARC/Null.pm
@@ -52,3 +52,5 @@ sub filter {
 
     return $record;
 }
+
+1;
diff --git a/Koha/SearchEngine.pm b/Koha/SearchEngine.pm
index d2d58bbb35..7aa1f85a6d 100644
--- a/Koha/SearchEngine.pm
+++ b/Koha/SearchEngine.pm
@@ -44,3 +44,5 @@ indicate that you want to be working with the authorities index.
 # may be used for, e.g., directory names.
 Readonly our $BIBLIOS_INDEX     => 'biblios';
 Readonly our $AUTHORITIES_INDEX => 'authorities';
+
+1;
diff --git a/misc/translator/VerboseWarnings.pm b/misc/translator/VerboseWarnings.pm
index 8d6d1cf0e8..65281ffcb1 100644
--- a/misc/translator/VerboseWarnings.pm
+++ b/misc/translator/VerboseWarnings.pm
@@ -123,4 +123,6 @@ sub warned {
     return $warned; # number of times warned
 }
 
+1;
+
 ###############################################################################
diff --git a/t/lib/Koha/Plugin/Test.pm b/t/lib/Koha/Plugin/Test.pm
index 0a92967738..1c296b0595 100644
--- a/t/lib/Koha/Plugin/Test.pm
+++ b/t/lib/Koha/Plugin/Test.pm
@@ -311,3 +311,5 @@ sub intranet_catalog_biblio_tab {
 sub _private_sub {
     return "";
 }
+
+1;