diff --git a/irctest/basecontrollers.py b/irctest/basecontrollers.py
index 6bf0494..0833b0f 100644
--- a/irctest/basecontrollers.py
+++ b/irctest/basecontrollers.py
@@ -69,11 +69,7 @@ class _BaseController:
         """Terminates the controlled process, waits for it to exit, and
         eventually kills it."""
         assert self.proc
-        self.proc.terminate()
-        try:
-            self.proc.wait(5)
-        except subprocess.TimeoutExpired:
-            self.proc.kill()
+        self.proc.kill()
         self.proc = None
 
     def kill(self) -> None:
@@ -98,13 +94,6 @@ class DirectoryBasedController(_BaseController):
         if self.directory:
             shutil.rmtree(self.directory)
 
-    def terminate(self) -> None:
-        """Stops the process gracefully, and does not clean its config."""
-        assert self.proc
-        self.proc.terminate()
-        self.proc.wait()
-        self.proc = None
-
     def open_file(self, name: str, mode: str = "a") -> IO:
         """Open a file in the configuration directory."""
         assert self.directory
@@ -182,7 +171,7 @@ class BaseServerController(_BaseController):
     port_open = False
     port: int
     hostname: str
-    services_controller: BaseServicesController
+    services_controller: Optional[BaseServicesController] = None
     extban_mute_char: Optional[str] = None
     """Character used for the 'mute' extban"""
 
@@ -205,7 +194,7 @@ class BaseServerController(_BaseController):
         username: str,
         password: Optional[str] = None,
     ) -> None:
-        if self.services_controller:
+        if self.services_controller is not None:
             self.services_controller.registerUser(case, username, password)
         else:
             raise NotImplementedByController("account registration")
@@ -232,8 +221,16 @@ class BaseServerController(_BaseController):
                 continue
 
     def wait_for_services(self) -> None:
+        assert self.services_controller is not None
         self.services_controller.wait_for_services()
 
+    def kill(self) -> None:
+        """Calls `kill_proc` and cleans the configuration."""
+        if self.services_controller is not None:
+            self.services_controller.kill()
+            self.services_controller = None
+        super().kill()
+
 
 class BaseServicesController(_BaseController):
     def __init__(
diff --git a/irctest/client_tests/test_tls.py b/irctest/client_tests/test_tls.py
index 6599795..7e61ed3 100644
--- a/irctest/client_tests/test_tls.py
+++ b/irctest/client_tests/test_tls.py
@@ -186,7 +186,7 @@ class StsTestCase(cases.BaseClientTestCase, cases.OptionalityHelper):
         self.acceptClient()
 
         # Kill the client
-        self.controller.terminate()
+        self.controller.kill()
 
         # Run the client, still configured to connect to the insecure server
         self.controller.run(