diff --git a/borgmatic/config/schema.yaml b/borgmatic/config/schema.yaml
index f2dc4d3..e180fcd 100644
--- a/borgmatic/config/schema.yaml
+++ b/borgmatic/config/schema.yaml
@@ -1690,9 +1690,9 @@ properties:
             push_code:
                 type: string
                 description: |
-                    Uptime Kuma "Push Code" from the push URL you have been given. 
-                    For example, the push code for 
-                    https://uptime.kuma/api/push/12345678?status=up&msg=OK&ping=
+                    Uptime Kuma "Push Code" from the push URL you have been 
+                    given. For example, the push code for 
+                    https://base.url/api/push/12345678?status=up&msg=OK&ping=
                     would be 12345678
                 example: 12345678
             states:
diff --git a/tests/unit/hooks/test_uptimekuma.py b/tests/unit/hooks/test_uptimekuma.py
new file mode 100644
index 0000000..3a58aa7
--- /dev/null
+++ b/tests/unit/hooks/test_uptimekuma.py
@@ -0,0 +1,266 @@
+from enum import Enum
+
+from flexmock import flexmock
+
+import borgmatic.hooks.monitor
+from borgmatic.hooks import uptimekuma as module
+
+default_base_url = 'https://example.uptime.kuma'
+custom_base_url = 'https://uptime.example.com'
+push_code = 'abcd1234'
+
+def test_ping_monitor_minimal_config_hits_hosted_ntfy_on_fail():
+    hook_config = {'push_code': push_code}
+    flexmock(module.requests).should_receive('get').with_args(
+        f'{default_base_url}/api/push/{push_code}'
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=True,
+    )
+
+
+def test_ping_monitor_with_access_token_hits_hosted_ntfy_on_fail():
+    hook_config = {
+        'topic': topic,
+        'access_token': 'abc123',
+    }
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=module.requests.auth.HTTPBasicAuth('', 'abc123'),
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_username_password_and_access_token_ignores_username_password():
+    hook_config = {
+        'topic': topic,
+        'username': 'testuser',
+        'password': 'fakepassword',
+        'access_token': 'abc123',
+    }
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=module.requests.auth.HTTPBasicAuth('', 'abc123'),
+    ).and_return(flexmock(ok=True)).once()
+    flexmock(module.logger).should_receive('warning').once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_username_password_hits_hosted_ntfy_on_fail():
+    hook_config = {
+        'topic': topic,
+        'username': 'testuser',
+        'password': 'fakepassword',
+    }
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=module.requests.auth.HTTPBasicAuth('testuser', 'fakepassword'),
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_password_but_no_username_warns():
+    hook_config = {'topic': topic, 'password': 'fakepassword'}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=None,
+    ).and_return(flexmock(ok=True)).once()
+    flexmock(module.logger).should_receive('warning').once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_username_but_no_password_warns():
+    hook_config = {'topic': topic, 'username': 'testuser'}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=None,
+    ).and_return(flexmock(ok=True)).once()
+    flexmock(module.logger).should_receive('warning').once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_minimal_config_does_not_hit_hosted_ntfy_on_start():
+    hook_config = {'topic': topic}
+    flexmock(module.requests).should_receive('post').never()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.START,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_minimal_config_does_not_hit_hosted_ntfy_on_finish():
+    hook_config = {'topic': topic}
+    flexmock(module.requests).should_receive('post').never()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FINISH,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_minimal_config_hits_selfhosted_ntfy_on_fail():
+    hook_config = {'topic': topic, 'server': custom_base_url}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{custom_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=None,
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_minimal_config_does_not_hit_hosted_ntfy_on_fail_dry_run():
+    hook_config = {'topic': topic}
+    flexmock(module.requests).should_receive('post').never()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=True,
+    )
+
+
+def test_ping_monitor_custom_message_hits_hosted_ntfy_on_fail():
+    hook_config = {'topic': topic, 'fail': custom_message_config}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}', headers=custom_message_headers, auth=None
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_custom_state_hits_hosted_ntfy_on_start():
+    hook_config = {'topic': topic, 'states': ['start', 'fail']}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.START),
+        auth=None,
+    ).and_return(flexmock(ok=True)).once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.START,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_connection_error_logs_warning():
+    hook_config = {'topic': topic}
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=None,
+    ).and_raise(module.requests.exceptions.ConnectionError)
+    flexmock(module.logger).should_receive('warning').once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )
+
+
+def test_ping_monitor_with_other_error_logs_warning():
+    hook_config = {'topic': topic}
+    response = flexmock(ok=False)
+    response.should_receive('raise_for_status').and_raise(
+        module.requests.exceptions.RequestException
+    )
+    flexmock(module.requests).should_receive('post').with_args(
+        f'{default_base_url}/{topic}',
+        headers=return_default_message_headers(borgmatic.hooks.monitor.State.FAIL),
+        auth=None,
+    ).and_return(response)
+    flexmock(module.logger).should_receive('warning').once()
+
+    module.ping_monitor(
+        hook_config,
+        {},
+        'config.yaml',
+        borgmatic.hooks.monitor.State.FAIL,
+        monitoring_log_level=1,
+        dry_run=False,
+    )