diff --git a/lib/Database.php b/lib/Database.php
index ca1246d..2bed918 100644
--- a/lib/Database.php
+++ b/lib/Database.php
@@ -1104,7 +1104,7 @@ class Database {
                 $icon = $icon['id'];
             } else {
                 // add the new icon to the cache
-                $icon = $this->db->prepare("INSERT INTO arsee_icons(url, type, data) values(?, ?, ?", "str", "str", "blob")->run($feed->iconUrl, $feed->iconType, $feed->iconData)->lastId();
+                $icon = $this->db->prepare("INSERT INTO arsse_icons(url, type, data) values(?, ?, ?)", "str", "str", "blob")->run($feed->iconUrl, $feed->iconType, $feed->iconData)->lastId();
             }
         }
         // actually perform updates
@@ -1258,9 +1258,9 @@ class Database {
      * @param string $url The URL of the icon to Retrieve
      * @param bool $withData Whether to return the icon content along with the metadata
      */
-    protected function iconGetByUrl(string $url, bool $withData =  true): array {
+    protected function iconGetByUrl(string $url, bool $withData =  true): ?array {
         $data = $withData ? "data" : "null as data";
-        return $this->db->prepare("SELECT id, url, type, $data, next_fetch from arsse_icons where url = ?", "str")->run($id)->getRow();
+        return $this->db->prepare("SELECT id, url, type, $data, next_fetch from arsse_icons where url = ?", "str")->run($url)->getRow();
     }
 
     
diff --git a/tests/cases/Database/SeriesFeed.php b/tests/cases/Database/SeriesFeed.php
index 1eb23bb..f79c8cc 100644
--- a/tests/cases/Database/SeriesFeed.php
+++ b/tests/cases/Database/SeriesFeed.php
@@ -26,6 +26,20 @@ trait SeriesFeed {
                     ["john.doe@example.com", "",2],
                 ],
             ],
+            'arsse_icons' => [
+                'columns' => [
+                    'id'   => "int",
+                    'url'  => "str",
+                    'type' => "str",
+                    'data' => "blob",
+                ],
+                'rows' => [
+                    [1,'http://localhost:8000/Icon/PNG','image/png',base64_decode("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuMjHxIGmVAAAADUlEQVQYV2NgYGBgAAAABQABijPjAAAAAABJRU5ErkJggg==")],
+                    [2,'http://localhost:8000/Icon/GIF','image/gif',base64_decode("R0lGODlhAQABAIABAAAAAP///yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==")],
+                    // this actually contains the data of SVG2, which will lead to a row update when retieved
+                    [3,'http://localhost:8000/Icon/SVG1','image/svg+xml','<svg xmlns="http://www.w3.org/2000/svg" width="900" height="600"><rect width="900" height="600" fill="#ED2939"/><rect width="600" height="600" fill="#fff"/><rect width="300" height="600" fill="#002395"/></svg>'],
+                ],
+            ],
             'arsse_feeds' => [
                 'columns' => [
                     'id'         => "int",
@@ -36,13 +50,19 @@ trait SeriesFeed {
                     'modified'   => "datetime",
                     'next_fetch' => "datetime",
                     'size'       => "int",
+                    'icon'       => "int",
                 ],
                 'rows' => [
-                    [1,"http://localhost:8000/Feed/Matching/3","Ook",0,"",$past,$past,0],
-                    [2,"http://localhost:8000/Feed/Matching/1","Eek",5,"There was an error last time",$past,$future,0],
-                    [3,"http://localhost:8000/Feed/Fetching/Error?code=404","Ack",0,"",$past,$now,0],
-                    [4,"http://localhost:8000/Feed/NextFetch/NotModified?t=".time(),"Ooook",0,"",$past,$past,0],
-                    [5,"http://localhost:8000/Feed/Parsing/Valid","Ooook",0,"",$past,$future,0],
+                    [1,"http://localhost:8000/Feed/Matching/3","Ook",0,"",$past,$past,0,null],
+                    [2,"http://localhost:8000/Feed/Matching/1","Eek",5,"There was an error last time",$past,$future,0,null],
+                    [3,"http://localhost:8000/Feed/Fetching/Error?code=404","Ack",0,"",$past,$now,0,null],
+                    [4,"http://localhost:8000/Feed/NextFetch/NotModified?t=".time(),"Ooook",0,"",$past,$past,0,null],
+                    [5,"http://localhost:8000/Feed/Parsing/Valid","Ooook",0,"",$past,$future,0,null],
+                    // these feeds all test icon caching
+                    [6,"http://localhost:8000/Feed/WithIcon/PNG",null,0,"",$past,$future,0,1], // no change when updated
+                    [7,"http://localhost:8000/Feed/WithIcon/GIF",null,0,"",$past,$future,0,1], // icon ID 2 will be assigned to feed when updated
+                    [8,"http://localhost:8000/Feed/WithIcon/SVG1",null,0,"",$past,$future,0,3], // icon ID 3 will be modified when updated
+                    [9,"http://localhost:8000/Feed/WithIcon/SVG2",null,0,"",$past,$future,0,null], // icon ID 4 will be created and assigned to feed when updated
                 ],
             ],
             'arsse_subscriptions' => [
@@ -261,4 +281,44 @@ trait SeriesFeed {
         Arsse::$db->feedUpdate(4);
         $this->assertEquals([1], Arsse::$db->feedListStale());
     }
+
+    public function testCheckIconDuringFeedUpdate(): void {
+        Arsse::$db->feedUpdate(6);
+        $state = $this->primeExpectations($this->data, [
+            'arsse_icons' => ["id","url","type","data"],
+            'arsse_feeds' => ["id", "icon"],
+        ]);
+        $this->compareExpectations(static::$drv, $state);
+    }
+
+    public function testAssignIconDuringFeedUpdate(): void {
+        Arsse::$db->feedUpdate(7);
+        $state = $this->primeExpectations($this->data, [
+            'arsse_icons' => ["id","url","type","data"],
+            'arsse_feeds' => ["id", "icon"],
+        ]);
+        $state['arsse_feeds']['rows'][6][1] = 2;
+        $this->compareExpectations(static::$drv, $state);
+    }
+
+    public function testChangeIconDuringFeedUpdate(): void {
+        Arsse::$db->feedUpdate(8);
+        $state = $this->primeExpectations($this->data, [
+            'arsse_icons' => ["id","url","type","data"],
+            'arsse_feeds' => ["id", "icon"],
+        ]);
+        $state['arsse_icons']['rows'][2][3] = '<svg xmlns="http://www.w3.org/2000/svg" width="900" height="600"><rect fill="#fff" height="600" width="900"/><circle fill="#bc002d" cx="450" cy="300" r="180"/></svg>';
+        $this->compareExpectations(static::$drv, $state);
+    }
+
+    public function testAddIconDuringFeedUpdate(): void {
+        Arsse::$db->feedUpdate(9);
+        $state = $this->primeExpectations($this->data, [
+            'arsse_icons' => ["id","url","type","data"],
+            'arsse_feeds' => ["id", "icon"],
+        ]);
+        $state['arsse_feeds']['rows'][8][1] = 4;
+        $state['arsse_icons']['rows'][] = [4,'http://localhost:8000/Icon/SVG2','image/svg+xml','<svg xmlns="http://www.w3.org/2000/svg" width="900" height="600"><rect width="900" height="600" fill="#ED2939"/><rect width="600" height="600" fill="#fff"/><rect width="300" height="600" fill="#002395"/></svg>'];
+        $this->compareExpectations(static::$drv, $state);
+    }
 }
diff --git a/tests/docroot/Feed/WithIcon/GIF.php b/tests/docroot/Feed/WithIcon/GIF.php
index 8b81b58..ae3ce22 100644
--- a/tests/docroot/Feed/WithIcon/GIF.php
+++ b/tests/docroot/Feed/WithIcon/GIF.php
@@ -3,6 +3,9 @@
     'content' => <<<MESSAGE_BODY
 <feed xmlns="http://www.w3.org/2005/Atom">
     <icon>/Icon/GIF</icon>
+    <entry>
+        <title>Example title</title>
+    </entry>
 </feed>
 MESSAGE_BODY
 ];
diff --git a/tests/docroot/Feed/WithIcon/PNG.php b/tests/docroot/Feed/WithIcon/PNG.php
index 3bca1c9..1e946d8 100644
--- a/tests/docroot/Feed/WithIcon/PNG.php
+++ b/tests/docroot/Feed/WithIcon/PNG.php
@@ -3,6 +3,9 @@
     'content' => <<<MESSAGE_BODY
 <feed xmlns="http://www.w3.org/2005/Atom">
     <icon>/Icon/PNG</icon>
+    <entry>
+        <title>Example title</title>
+    </entry>
 </feed>
 MESSAGE_BODY
 ];
diff --git a/tests/docroot/Feed/WithIcon/SVG1.php b/tests/docroot/Feed/WithIcon/SVG1.php
index 5f5acc8..8bbabde 100644
--- a/tests/docroot/Feed/WithIcon/SVG1.php
+++ b/tests/docroot/Feed/WithIcon/SVG1.php
@@ -3,6 +3,9 @@
     'content' => <<<MESSAGE_BODY
 <feed xmlns="http://www.w3.org/2005/Atom">
     <icon>/Icon/SVG1</icon>
+    <entry>
+        <title>Example title</title>
+    </entry>
 </feed>
 MESSAGE_BODY
 ];
diff --git a/tests/docroot/Feed/WithIcon/SVG2.php b/tests/docroot/Feed/WithIcon/SVG2.php
index aca3c79..ce36bb7 100644
--- a/tests/docroot/Feed/WithIcon/SVG2.php
+++ b/tests/docroot/Feed/WithIcon/SVG2.php
@@ -3,6 +3,9 @@
     'content' => <<<MESSAGE_BODY
 <feed xmlns="http://www.w3.org/2005/Atom">
     <icon>/Icon/SVG2</icon>
+    <entry>
+        <title>Example title</title>
+    </entry>
 </feed>
 MESSAGE_BODY
 ];