diff --git a/backend/store.py b/backend/store.py
index b5e936ec..752a39de 100644
--- a/backend/store.py
+++ b/backend/store.py
@@ -157,7 +157,10 @@ class ChangeDetectionStore:
 
     def delete(self, uuid):
         with self.lock:
-            del (self.__data['watching'][uuid])
+            if uuid == 'all':
+                self.__data['watching'] = {}
+            else:
+                del (self.__data['watching'][uuid])
             self.needs_write = True
 
     def url_exists(self, url):
diff --git a/backend/tests/test_backend.py b/backend/tests/test_backend.py
index dac5aa5d..9ccc049e 100644
--- a/backend/tests/test_backend.py
+++ b/backend/tests/test_backend.py
@@ -119,3 +119,5 @@ def test_check_basic_change_detection_functionality(client, live_server):
     res = client.get(url_for("index"))
     assert b'unviewed' in res.data
 
+    res = client.get(url_for("api_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data
diff --git a/backend/tests/test_ignore_text.py b/backend/tests/test_ignore_text.py
index da72b71e..69489169 100644
--- a/backend/tests/test_ignore_text.py
+++ b/backend/tests/test_ignore_text.py
@@ -124,4 +124,6 @@ def test_check_ignore_text_functionality(client, live_server):
     assert b'unviewed' not in res.data
     assert b'/test-endpoint' in res.data
 
+    res = client.get(url_for("api_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data