diff --git a/lib/Zonemaster/CLI.pm b/lib/Zonemaster/CLI.pm
index a789910f..2940d48d 100755
--- a/lib/Zonemaster/CLI.pm
+++ b/lib/Zonemaster/CLI.pm
@@ -192,7 +192,7 @@ has 'test' => (
     isa           => 'ArrayRef',
     required      => 0,
     documentation => __(
-'Specify test to run. Should be either the name of a module, or the name of a module and the name of a method in that module separated by a "/" character (Example: "Basic/basic1"). The method specified must be one that takes a zone object as its single argument. This switch can be repeated.'
+'Specify test to run case-insensitively. Should be either the name of a module, or the name of a module and the name of a method in that module separated by a "/" character (Example: "Basic/basic01"). This switch can be repeated.'
     )
 );
 
@@ -622,7 +622,7 @@ sub run {
     eval {
         if ( $self->test and @{ $self->test } > 0 ) {
             foreach my $t ( @{ $self->test } ) {
-                my ( $module, $method ) = split( '/', $t, 2 );
+                my ( $module, $method ) = split( '/', lc($t), 2 );
                 if ( $method ) {
                     Zonemaster::Engine->test_method( $module, $method, Zonemaster::Engine->zone( $domain ) );
                 }
diff --git a/script/zonemaster-cli b/script/zonemaster-cli
index 00fbe6bf..d00268f9 100755
--- a/script/zonemaster-cli
+++ b/script/zonemaster-cli
@@ -202,6 +202,7 @@ Limit the testing suite to run only the specified tests.
 This can be the name of a testing module, in which case all test cases from
 that module will be run, or the name of a module followed by a slash and the
 name of a test case (test case identifier) in that module.
+This option is case-insensitive.
 
 =item --stop_level=LEVEL, --stop-level=LEVEL