diff --git a/.travis.yml b/.travis.yml
index bd7316f..4fdf730 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,19 +4,19 @@ dist: trusty
 matrix:
   include:
     - php: 5.6
-      env: DB=MYSQL PHPCS_TEST=1 PHPUNIT_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.0.x-dev PHPCS_TEST=1 PHPUNIT_TEST=1
     - php: 7.0
-      env: DB=PGSQL PHPUNIT_TEST=1
+      env: DB=PGSQL INSTALLER_VERSION=4.1.x-dev PHPUNIT_TEST=1
     - php: 7.1
-      env: DB=MYSQL PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.2.x-dev PHPUNIT_COVERAGE_TEST=1
     - php: 7.2
-      env: DB=MYSQL PHPUNIT_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.x-dev PHPUNIT_TEST=1
 
 before_script:
   - phpenv rehash
   - phpenv config-rm xdebug.ini
   - composer validate
-  - composer require silverstripe/installer:4.0.x-dev ezyang/htmlpurifier:* --no-update
+  - composer require silverstripe/installer:"$INSTALLER_VERSION" ezyang/htmlpurifier:* --no-update
   - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql:2.0.x-dev; fi
   - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
 
diff --git a/tests/CommentsGridFieldActionTest.php b/tests/CommentsGridFieldActionTest.php
index 126ae47..8558df2 100644
--- a/tests/CommentsGridFieldActionTest.php
+++ b/tests/CommentsGridFieldActionTest.php
@@ -8,13 +8,13 @@ use SilverStripe\Comments\Admin\CommentsGridFieldAction;
 use SilverStripe\Comments\Admin\CommentsGridFieldConfig;
 use SilverStripe\Comments\Model\Comment;
 use SilverStripe\Comments\Tests\Stubs\CommentableItem;
+use SilverStripe\Comments\Tests\Stubs\Team;
 use SilverStripe\Control\Controller;
 use SilverStripe\Dev\SapphireTest;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\Form;
 use SilverStripe\Forms\GridField\GridField;
 use SilverStripe\Forms\GridField\GridFieldDeleteAction;
-use SilverStripe\Forms\Tests\GridField\GridFieldTest\Team;
 use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\DataObject;
@@ -25,6 +25,7 @@ class CommentsGridFieldActionTest extends SapphireTest
 
     protected static $extra_dataobjects = [
         CommentableItem::class,
+        Team::class,
     ];
 
     /** @var ArrayList */
diff --git a/tests/Stubs/Cheerleader.php b/tests/Stubs/Cheerleader.php
new file mode 100644
index 0000000..25a5f87
--- /dev/null
+++ b/tests/Stubs/Cheerleader.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace SilverStripe\Comments\Tests\Stubs;
+
+use SilverStripe\Dev\TestOnly;
+use SilverStripe\ORM\DataObject;
+
+class Cheerleader extends DataObject implements TestOnly
+{
+    private static $table_name = 'CommentsTest_Cheerleader';
+
+    private static $db = [
+        'Name' => 'Varchar',
+    ];
+
+    private static $has_one = [
+        'Team' => Team::class,
+    ];
+}
diff --git a/tests/Stubs/Player.php b/tests/Stubs/Player.php
new file mode 100644
index 0000000..0720b30
--- /dev/null
+++ b/tests/Stubs/Player.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace SilverStripe\Comments\Tests\Stubs;
+
+use SilverStripe\Dev\TestOnly;
+use SilverStripe\ORM\DataObject;
+use SilverStripe\ORM\ManyManyList;
+
+/**
+ * @method ManyManyList Teams()
+ */
+class Player extends DataObject implements TestOnly
+{
+    private static $table_name = 'CommentsTest_Player';
+
+    private static $db = array(
+        'Name' => 'Varchar',
+        'Email' => 'Varchar',
+    );
+
+    private static $belongs_many_many = [
+        'Teams' => Team::class,
+    ];
+}
diff --git a/tests/Stubs/Team.php b/tests/Stubs/Team.php
new file mode 100644
index 0000000..985dc60
--- /dev/null
+++ b/tests/Stubs/Team.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace SilverStripe\Comments\Tests\Stubs;
+
+use SilverStripe\Dev\TestOnly;
+use SilverStripe\ORM\DataObject;
+
+class Team extends DataObject implements TestOnly
+{
+    private static $table_name = 'CommentsTest_Team';
+
+    private static $db = array(
+        'Name' => 'Varchar',
+        'City' => 'Varchar',
+    );
+
+    private static $many_many = [
+        'Players' => Player::class,
+    ];
+
+    private static $has_many = [
+        'Cheerleaders' => Cheerleader::class,
+    ];
+
+    private static $searchable_fields = [
+        'Name',
+        'City',
+        'Cheerleaders.Name',
+    ];
+
+    public function canView($member = null)
+    {
+        return true;
+    }
+}