diff --git a/common/docker/perl.yml b/common/docker/perl.yml
index ec0153d1f..4fb2c2a32 100644
--- a/common/docker/perl.yml
+++ b/common/docker/perl.yml
@@ -20,4 +20,4 @@ services:
       mysql-sdr:
         condition: service_healthy
     working_dir: "/htapps/babel"
-    command: "prove -r imgsrv/t mdp-lib/t"
+    command: "prove -r imgsrv/t ls/t mdp-lib/t"
diff --git a/docker-compose.yml b/docker-compose.yml
index 2ade5165a..16376ad7a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -76,7 +76,7 @@ services:
     extends:
       file: common/docker/perl.yml
       service: perl
-    command: "prove -r imgsrv/t mdp-lib/t"
+    command: "prove -r imgsrv/t ls/t mdp-lib/t"
     profiles:
       - testing
 
diff --git a/ls/t/LS/Query/Facets.t b/ls/t/LS/Query/Facets.t
new file mode 100644
index 000000000..69870e6ef
--- /dev/null
+++ b/ls/t/LS/Query/Facets.t
@@ -0,0 +1,99 @@
+use strict;
+use warnings;
+
+use Data::Dumper;
+use Encode;
+use Test::More;
+
+use lib "$ENV{SDRROOT}/ls/lib";
+use lib "$ENV{SDRROOT}/slip-lib";
+use lib "$ENV{SDRROOT}/mdp-lib";
+
+use Auth::Auth;
+use Context;
+use Database;
+use LS::PIFiller::Advanced;
+use LS::FacetConfig;
+use LS::Query::Facets;
+use Utils;
+
+
+### THE MINDLESS SETUP BOILERPLATE
+# copied from cgi/ls
+my $C = new Context;
+my $db_user = $ENV{'MARIADB_USER'} || 'ht_testing';
+my $db = new Database($db_user);
+  $C->set_object('Database', $db);
+my $config = new MdpConfig(
+                           Utils::get_uber_config_path('ls'),
+                           $ENV{SDRROOT} . "/ls/lib/Config/global.conf",
+                           $ENV{SDRROOT} . "/ls/lib/Config/local.conf"
+                          );
+$C->set_object('MdpConfig', $config);
+my $AB_test_config_filename = $ENV{SDRROOT} . '/ls/lib/Config/AB_test_config';
+my $AB_test_config = $config = Config::Tiny->read($AB_test_config_filename);
+ASSERT($AB_test_config, qq{Error in testing config file $AB_test_config_filename: } . Config::Tiny::errstr);
+# 1 disables checking object name
+$C->set_object('AB_test_config', $AB_test_config, 1);
+my $facet_config = new LS::FacetConfig($C, $ENV{SDRROOT} . "/ls/lib/Config/facetconfig.pl");
+$C->set_object('FacetConfig', $facet_config);
+my $auth = new Auth::Auth($C);
+$C->set_object('Auth', $auth);
+
+my $AB = 'A';
+
+
+# NOTE: this is an almost completely useless test that illustrates the scaffolding
+# we need to run better ones in the future.
+# The resulting query strings are complex. I don't really know what to do with them
+# beyond poking around with ugly regexes.
+subtest 'get_Solr_query_string' => sub {
+  # Mindlessly copied from test/testQueries.pl
+  my $query_config = {
+    solr_start_row => 0,
+    solr_num_rows => 2,
+    query_type => 'full_text'
+  };
+  subtest 'advanced search' => sub {
+    subtest 'two terms' => sub {
+      my $cgi = CGI->new;
+      $C->set_object('CGI', $cgi);
+      $cgi->param('adv', '1');
+
+      $cgi->param('field1', 'ocr');
+      $cgi->param('anyall1', 'all');
+      $cgi->param('q1', 'search1');
+
+      $cgi->param('field2', 'author');
+      $cgi->param('anyall2', 'all');
+      $cgi->param('q2', 'search2');
+
+      $cgi->param('op2', 'AND');
+      my $facets = new LS::Query::Facets($C, '', undef, $query_config);
+      my $query_string = $facets->get_Solr_query_string($C, $AB);
+      ok($query_string =~ m/AND\s+_query/, 'result is not parenthesized because q3 and q4 are not present');
+    };
+
+    subtest 'two terms separated by gap' => sub {
+      my $cgi = CGI->new;
+      $C->set_object('CGI', $cgi);
+      $cgi->param('adv', '1');
+
+      $cgi->param('field1', 'ocr');
+      $cgi->param('anyall1', 'all');
+      $cgi->param('q1', 'search1');
+
+      $cgi->param('field4', 'author');
+      $cgi->param('anyall4', 'all');
+      $cgi->param('q4', 'search2');
+      
+      $cgi->param('op3', 'AND');
+      
+      my $facets = new LS::Query::Facets($C, '', undef, $query_config);
+      my $query_string = $facets->get_Solr_query_string($C, $AB);
+      ok($query_string =~ m/\) AND \(/, 'result is parenthesized because `(1 op2 2) op3 (3 op4 4)`');
+    };
+  };
+};
+
+done_testing;