diff --git a/.travis.yml b/.travis.yml
index f0ca414..5e60164 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,16 +17,17 @@ matrix:
     - php: 5.6
       env: DB=MYSQL CORE_RELEASE=3.5
     - php: 5.6
-      env: DB=MYSQL CORE_RELEASE=3.6
+      env: DB=MYSQL CORE_RELEASE=3.6 MAINTENANCE=^1
     - php: 7.0
       env: DB=MYSQL CORE_RELEASE=3.6
     - php: 7.1
-      env: DB=MYSQL CORE_RELEASE=3.6
+      env: DB=MYSQL CORE_RELEASE=3.6 MAINTENANCE=1.0.x-dev
 
 before_script:
   - composer self-update || true
   - composer clear-cache
   - composer validate --strict
+  - if [[ $MAINTENANCE ]]; then composer require --no-update bringyourownideas/silverstripe-maintenance $MAINTENANCE; fi
   - git clone git://github.com/silverstripe-labs/silverstripe-travis-support.git ~/travis-support
   - php ~/travis-support/travis_setup.php --source `pwd` --target ~/builds/ss
   - cd ~/builds/ss
diff --git a/src/Extensions/PackageSecruityExtension.php b/src/Extensions/PackageSecurityExtension.php
similarity index 100%
rename from src/Extensions/PackageSecruityExtension.php
rename to src/Extensions/PackageSecurityExtension.php
diff --git a/templates/SecurityAlertSummary.ss b/templates/SecurityAlertSummary.ss
index 66a317d..2880447 100644
--- a/templates/SecurityAlertSummary.ss
+++ b/templates/SecurityAlertSummary.ss
@@ -1,6 +1,6 @@
-<p>
+<p class="site-summary__security-alerts">
     <strong><%t SecurityAlertSummary.TITLE "Security alert" %></strong><br />
-    <% if Count > 1 %>
+    <% if $Count > 1 %>
         <%t SecurityAlertSummary.NOTICE_MANY "Notices have been issued for <strong>{count}</strong> of your modules. Review and updating is recommended." count=$Count %>
     <% else %>
         <%t SecurityAlertSummary.NOTICE_ONE "A notice has been issued for <strong>{count}</strong> of your modules. Review and updating is recommended." count=$Count %>
diff --git a/tests/PackageSecurityExtensionTest.php b/tests/PackageSecurityExtensionTest.php
new file mode 100644
index 0000000..ccabd1f
--- /dev/null
+++ b/tests/PackageSecurityExtensionTest.php
@@ -0,0 +1,30 @@
+<?php
+
+class PackageSecurityExtensionTest extends SapphireTest
+{
+    protected static $fixture_file = 'PackagesWithAlerts.yml';
+
+    public function setUp()
+    {
+        if (!class_exists(Package::class)) {
+            $this->markTestSkipped(
+                'Module bringyourownideas/silverstripe-maintenance is required for this test, but is not present.'
+            );
+        }
+        parent::setUp();
+    }
+
+    public function testListSecurityAlertIdentifiers()
+    {
+        $package = $this->objFromFixture(Package::class, 'otheralerts');
+        $this->assertEquals('ABC-001, SPY-007', $package->listSecurityAlertIdentifiers());
+    }
+
+    public function testGetBadgesHook()
+    {
+        $package = $this->objFromFixture(Package::class, 'otheralerts');
+        $badges = $package->getBadges();
+        $this->assertCount(1, $badges);
+        $this->assertEquals('warning security-alerts__toggler', $badges->first()->Type);
+    }
+}
diff --git a/tests/PackagesWithAlerts.yml b/tests/PackagesWithAlerts.yml
new file mode 100644
index 0000000..7470e9d
--- /dev/null
+++ b/tests/PackagesWithAlerts.yml
@@ -0,0 +1,25 @@
+Package:
+  noalerts:
+    Name: venderr/noalert
+    Type: silverstripe-module
+  analert:
+    Name: venderr/analert
+    Type: silverstripe-vendormodule
+  otheralerts:
+    Name: venderr/otheralerts
+    Type: silverstripe-module
+SecurityAlert:
+  one:
+    ID: 1
+    Title: 'an alert'
+    PackageRecord: '=>Package.analert'
+  two:
+    ID: 2
+    Title: 'another alert'
+    Identifier: ABC-001
+    PackageRecord: '=>Package.otheralerts'
+  three:
+    ID: 4
+    Title: 'other alert'
+    Identifier: SPY-007
+    PackageRecord: '=>Package.otheralerts'
\ No newline at end of file
diff --git a/tests/SecurityAlertExtensionTest.php b/tests/SecurityAlertExtensionTest.php
new file mode 100644
index 0000000..ea9ef36
--- /dev/null
+++ b/tests/SecurityAlertExtensionTest.php
@@ -0,0 +1,22 @@
+<?php
+
+class SecurityAlertExtensionTest extends SapphireTest
+{
+    protected static $fixture_file = 'PackagesWithAlerts.yml';
+
+    public function setUp()
+    {
+        if (!class_exists(Package::class)) {
+            $this->markTestSkipped(
+                'Module bringyourownideas/silverstripe-maintenance is required for this test, but is not present.'
+            );
+        }
+        parent::setUp();
+    }
+
+    public function testExtensionAppliesWhenMaintenanceModuleIsPresent()
+    {
+        $alert = $this->objFromFixture(SecurityAlert::class, 'two');
+        $this->assertTrue($alert->PackageRecord()->exists());
+    }
+}
diff --git a/tests/SiteSummaryExtensionTest.php b/tests/SiteSummaryExtensionTest.php
new file mode 100644
index 0000000..b1833ab
--- /dev/null
+++ b/tests/SiteSummaryExtensionTest.php
@@ -0,0 +1,66 @@
+<?php
+
+use BringYourOwnIdeas\SecurityChecker\Tests\Stubs\SiteSummaryAlertStub;
+
+class SiteSummaryExtensionTest extends SapphireTest
+{
+    protected static $fixture_file = 'PackagesWithAlerts.yml';
+
+    protected $requiredExtensions = [
+        SiteSummary::class => [SiteSummaryAlertStub::class]
+    ];
+
+    public function setUpOnce()
+    {
+        if (!class_exists(Package::class)) {
+            $this->requiredExtensions = [];
+        }
+        parent::setUpOnce();
+    }
+
+    public function setUp()
+    {
+        if (!class_exists(Package::class)) {
+            $this->markTestSkipped(
+                'Module bringyourownideas/silverstripe-maintenance is required for this test, but is not present.'
+            );
+        }
+        // The themes should not affect test results.
+        // Ensure we use the default templates supplied with this module.
+        Config::inst()->update(SSViewer::class, 'theme_enabled', false);
+        parent::setUp();
+    }
+
+    public function testDisplayColumnsDoesNotIncludePrintingColumns()
+    {
+        $report = Injector::inst()->create(SiteSummary::class);
+        // screen output should not include this summary field added by the extension
+        $this->assertArrayNotHasKey('listSecurityAlertIdentifiers', $report->columns());
+        // default summary fields are still used for print output (e.g. CSV export)
+        $this->assertArrayHasKey('listSecurityAlertIdentifiers', Package::create()->summaryFields());
+    }
+
+    public function testUpdateAlerts()
+    {
+        $report = Injector::inst()->create(SiteSummary::class);
+        $fields = $report->getCMSFields();
+        $alertSummary = $fields->fieldByName('AlertSummary');
+        $this->assertInstanceOf(LiteralField::class, $alertSummary);
+        $content = $alertSummary->getContent();
+        $this->assertContains(
+            'Sound the alarm!',
+            $content,
+            'ensure our extension doesn\'t override all others'
+        );
+        $this->assertContains(
+            'site-summary__security-alerts',
+            $content,
+            'ensure content from our extension is present'
+        );
+        $this->assertContains(
+            '<strong>2</strong>',
+            $content,
+            'ensure we are counting modules with alerts, not the total number of alerts'
+        );
+    }
+}
diff --git a/tests/Stubs/SiteSummaryAlertStub.php b/tests/Stubs/SiteSummaryAlertStub.php
new file mode 100644
index 0000000..a47d4c3
--- /dev/null
+++ b/tests/Stubs/SiteSummaryAlertStub.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace BringYourOwnIdeas\SecurityChecker\Tests\Stubs;
+
+use Extension;
+use TestOnly;
+
+class SiteSummaryAlertStub extends Extension implements TestOnly
+{
+    public function updateAlerts(&$alerts)
+    {
+        $alerts[] = '<p><strong>Alert! Alert!</strong> <br />Sound the alarm!</p>';
+    }
+}