diff --git a/t/db_dependent/Koha/Installer.t b/t/db_dependent/Koha/Installer.t
index 649b4636ce..c9091d2bde 100755
--- a/t/db_dependent/Koha/Installer.t
+++ b/t/db_dependent/Koha/Installer.t
@@ -99,13 +99,11 @@ subtest 'needs_update' => sub {
 };
 
 subtest 'TransformToNum' => sub {
-    plan tests => 5;
+    plan tests => 3;
 
     my %test_cases = (
         '20.05.01.000' => '20.0501000',
-        '19.11.02.XXX' => '19.1102999',
         '21.06.00.003' => '21.0600003',
-        '18.05.02.XXX' => '18.0502999',
         '22.11.01.123' => '22.1101123',
     );