diff --git a/concore.py b/concore.py
index 01c4e0f..bc6d564 100644
--- a/concore.py
+++ b/concore.py
@@ -112,13 +112,19 @@ def _write_kill_script():
     try:
         reg_name = os.path.basename(_PID_REGISTRY_FILE)
         bat_name = os.path.basename(_KILL_SCRIPT_FILE)
+        # nodes run as "python <script>.py", so check for the script name
+        script_name = os.path.basename(sys.argv[0]) if sys.argv else ""
+        marker = script_name if script_name.endswith(".py") else "concore"
+        if not marker.isascii():
+            marker = "concore"
+        marker = marker.replace("%", "%%")
         script = "@echo off\r\n"
         script += 'if not exist "%~dp0' + reg_name + '" (\r\n'
         script += "    echo No PID registry found. Nothing to kill.\r\n"
         script += "    exit /b 0\r\n"
         script += ")\r\n"
         script += 'for /f "usebackq tokens=*" %%p in ("%~dp0' + reg_name + '") do (\r\n'
-        script += '    powershell -NoProfile -Command "(Get-CimInstance Win32_Process -Filter \'ProcessId=%%p\').CommandLine" 2>nul | findstr /i "concore" >nul\r\n'
+        script += '    powershell -NoProfile -Command "(Get-CimInstance Win32_Process -Filter \'ProcessId=%%p\').CommandLine" 2>nul | findstr /i /l /c:"' + marker + '" >nul\r\n'
         script += "    if not errorlevel 1 (\r\n"
         script += "        echo Killing concore process %%p\r\n"
         script += "        taskkill /F /PID %%p >nul 2>&1\r\n"
diff --git a/tests/test_concore.py b/tests/test_concore.py
index 943075d..edfd795 100644
--- a/tests/test_concore.py
+++ b/tests/test_concore.py
@@ -842,9 +842,10 @@ def test_cleanup_pid_handles_missing_registry(self):
         assert not os.path.exists(_PID_REGISTRY_FILE)
         _cleanup_pid()  # Should not raise
 
-    def test_write_kill_script_generates_bat_file(self):
+    def test_write_kill_script_generates_bat_file(self, monkeypatch):
         from concore import _write_kill_script, _KILL_SCRIPT_FILE, _PID_REGISTRY_FILE
 
+        monkeypatch.setattr(sys, "argv", ["controller.py"])
         _write_kill_script()
         assert os.path.exists(_KILL_SCRIPT_FILE)
         with open(_KILL_SCRIPT_FILE) as f:
@@ -853,19 +854,34 @@ def test_write_kill_script_generates_bat_file(self):
         assert "wmic" not in content
         assert "Get-CimInstance" in content
         assert "taskkill" in content
-        assert "concore" in content.lower()
+        assert 'findstr /i /l /c:"controller.py"' in content
 
     @pytest.mark.skipif(sys.platform != "win32", reason="Windows only")
-    def test_kill_script_kills_concore_process(self):
+    def test_kill_script_kills_concore_process(self, monkeypatch):
         import subprocess
+        import time
         from concore import _write_kill_script, _KILL_SCRIPT_FILE, _PID_REGISTRY_FILE
 
-        proc = subprocess.Popen(
-            [sys.executable, "-c", "import time; time.sleep(60)", "concore_node"]
-        )
+        # a node runs as "python controller.py" and registers its own PID
+        with open("controller.py", "w") as f:
+            f.write(
+                "import os, time\n"
+                "with open('concorekill_pids.txt', 'a') as f:\n"
+                "    f.write(str(os.getpid()) + '\\n')\n"
+                "time.sleep(60)\n"
+            )
+        monkeypatch.setattr(sys, "argv", ["controller.py"])
+        proc = subprocess.Popen([sys.executable, "controller.py"])
         try:
-            with open(_PID_REGISTRY_FILE, "w") as f:
-                f.write(str(proc.pid) + "\n")
+            node_pid = ""
+            for _ in range(100):
+                if os.path.exists(_PID_REGISTRY_FILE):
+                    with open(_PID_REGISTRY_FILE) as f:
+                        node_pid = f.read().strip()
+                if node_pid:
+                    break
+                time.sleep(0.1)
+            assert node_pid
             _write_kill_script()
             result = subprocess.run(
                 ["cmd", "/c", _KILL_SCRIPT_FILE],
@@ -873,7 +889,7 @@ def test_kill_script_kills_concore_process(self):
                 text=True,
                 timeout=60,
             )
-            assert "Killing concore process " + str(proc.pid) in result.stdout
+            assert "Killing concore process " + node_pid in result.stdout
             proc.wait(timeout=10)
             assert not os.path.exists(_PID_REGISTRY_FILE)
             assert not os.path.exists(_KILL_SCRIPT_FILE)