diff --git a/decnet/cli.py b/decnet/cli.py
index 69a1866..47d9854 100644
--- a/decnet/cli.py
+++ b/decnet/cli.py
@@ -62,6 +62,10 @@ def _kill_api() -> None:
                 console.print(f"[yellow]Stopping DECNET Mutator Watcher (PID {_proc.info['pid']})...[/]")
                 os.kill(_proc.info['pid'], signal.SIGTERM)
                 _killed = True
+            elif "decnet.cli" in _cmd and "collect" in _cmd:
+                console.print(f"[yellow]Stopping DECNET Collector (PID {_proc.info['pid']})...[/]")
+                os.kill(_proc.info['pid'], signal.SIGTERM)
+                _killed = True
         except (psutil.NoSuchProcess, psutil.AccessDenied):
             continue
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 3cae81f..2cbebc5 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -337,9 +337,14 @@ class TestKillApi:
             "pid": 222, "name": "python",
             "cmdline": ["python", "decnet.cli", "mutate", "--watch"],
         }
-        mock_iter.return_value = [mock_uvicorn, mock_mutate]
+        mock_collector = MagicMock()
+        mock_collector.info = {
+            "pid": 333, "name": "python",
+            "cmdline": ["python", "-m", "decnet.cli", "collect", "--log-file", "/tmp/decnet.log"],
+        }
+        mock_iter.return_value = [mock_uvicorn, mock_mutate, mock_collector]
         _kill_api()
-        assert mock_kill.call_count == 2
+        assert mock_kill.call_count == 3
 
     @patch("psutil.process_iter")
     def test_no_matching_processes(self, mock_iter):