diff --git a/core/testcase.php b/core/testcase.php
index f536e92b..74cd686a 100644
--- a/core/testcase.php
+++ b/core/testcase.php
@@ -161,6 +161,9 @@ if(class_exists("\\PHPUnit\\Framework\\TestCase")) {
             }
         }
 
+        /**
+         * Assert that the page contains the given text somewhere in the blocks
+         */
         protected function assert_text(string $text, string $section = null): void
         {
             $this->assertStringContainsString($text, $this->page_to_text($section));
@@ -171,6 +174,9 @@ if(class_exists("\\PHPUnit\\Framework\\TestCase")) {
             $this->assertStringNotContainsString($text, $this->page_to_text($section));
         }
 
+        /**
+         * Assert that the page contains the given text somewhere in the binary data
+         */
         protected function assert_content(string $content): void
         {
             global $page;
diff --git a/ext/download/main.php b/ext/download/main.php
index 52f42888..5bf5facc 100644
--- a/ext/download/main.php
+++ b/ext/download/main.php
@@ -14,17 +14,13 @@ class Download extends Extension
         return 99;
     }
 
-
     public function onImageDownloading(ImageDownloadingEvent $event)
     {
         global $page;
 
         $page->set_mime($event->mime);
-
         $page->set_mode(PageMode::FILE);
-
         $page->set_file($event->path, $event->file_modified);
-
         $event->stop_processing = true;
     }
 }
diff --git a/ext/download/test.php b/ext/download/test.php
new file mode 100644
index 00000000..b0ac2949
--- /dev/null
+++ b/ext/download/test.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+class DownloadTest extends ShimmiePHPUnitTestCase
+{
+    public function testView()
+    {
+        global $page;
+        $image_id = $this->post_image("tests/pbx_screenshot.jpg", "pbx computer screenshot");
+        $this->get_page("/image/$image_id");
+        $this->assertEquals(PageMode::FILE, $page->mode);
+    }
+}
diff --git a/ext/et_server/main.php b/ext/et_server/main.php
index c88ac6cc..dbc314c6 100644
--- a/ext/et_server/main.php
+++ b/ext/et_server/main.php
@@ -12,7 +12,6 @@ class ETServer extends Extension
     {
         global $database, $page, $user;
         if ($event->page_matches("register.php")) {
-            error_log("register.php");
             if (isset($_POST["data"])) {
                 $database->execute(
                     "INSERT INTO registration(data) VALUES(:data)",
diff --git a/ext/et_server/test.php b/ext/et_server/test.php
new file mode 100644
index 00000000..9b80e637
--- /dev/null
+++ b/ext/et_server/test.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+class ETServerTest extends ShimmiePHPUnitTestCase
+{
+    public function testView()
+    {
+        $this->post_page("register.php", ["data" => "test entry"]);
+
+        $this->log_in_as_user();
+        $this->get_page("register.php");
+        $this->assert_no_text("test entry");
+
+        $this->log_in_as_admin();
+        $this->get_page("register.php");
+        $this->assert_text("test entry");
+    }
+}
diff --git a/ext/image_view_counter/test.php b/ext/image_view_counter/test.php
new file mode 100644
index 00000000..1722d1c5
--- /dev/null
+++ b/ext/image_view_counter/test.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+class ImageViewCounterTest extends ShimmiePHPUnitTestCase
+{
+    public function testPostView()
+    {
+        $image_id = $this->post_image("tests/pbx_screenshot.jpg", "pbx computer screenshot");
+        $this->log_in_as_admin();
+        $this->get_page("post/view/$image_id");
+        $this->assert_text("Views");
+    }
+
+    public function testPopular()
+    {
+        $image_id = $this->post_image("tests/pbx_screenshot.jpg", "pbx computer screenshot");
+        $this->get_page("popular_images");
+        $this->assert_text("$image_id");
+    }
+}
diff --git a/ext/image_view_counter/theme.php b/ext/image_view_counter/theme.php
index d6c07f34..5ba94656 100644
--- a/ext/image_view_counter/theme.php
+++ b/ext/image_view_counter/theme.php
@@ -6,7 +6,10 @@ namespace Shimmie2;
 
 class ImageViewCounterTheme extends Themelet
 {
-    public function view_popular($images)
+    /**
+     * @param Image[] $images
+     */
+    public function view_popular(array $images)
     {
         global $page, $config;
         $pop_images = "";