diff --git a/tests/test_feed.py b/tests/test_feed.py
index 84a1bdc..c3c877a 100644
--- a/tests/test_feed.py
+++ b/tests/test_feed.py
@@ -4,9 +4,25 @@ import http.server
 import threading
 import typing
 
+import contextlib
+import time
 
 from cry import feed
 
+TRACE_ELAPSED = False
+
+
+@contextlib.contextmanager
+def dumb_trace(name):
+    start = time.time()
+    if TRACE_ELAPSED:
+        print(f"{start:.3f} ENTER {name}")
+    yield
+    end = time.time()
+    elapsed = end - start
+    if TRACE_ELAPSED:
+        print(f"{end:.3f} EXIT {name} (elapsed: {elapsed:.3f}s")
+
 
 @dataclasses.dataclass
 class MockResponse:
@@ -33,18 +49,22 @@ class TestWebServer:
     handlers: dict[str, list[MockResponse]]
 
     def __init__(self):
-        server = self
+        with dumb_trace("init"):
+            server = self
 
-        class TestWebHandler(http.server.BaseHTTPRequestHandler):
-            def do_GET(self):
-                server._handle_GET(self)
+            class TestWebHandler(http.server.BaseHTTPRequestHandler):
+                def do_GET(self):
+                    server._handle_GET(self)
 
-        self.http_server = http.server.ThreadingHTTPServer(("", 0), TestWebHandler)
-        self.server_thread = threading.Thread(target=self.http_server.serve_forever)
-        self.server_thread.daemon = True
-        self.handlers = {}
+            self.http_server = http.server.ThreadingHTTPServer(("", 0), TestWebHandler)
+            self.server_thread = threading.Thread(target=self._do_serve)
+            self.server_thread.daemon = True
+            self.handlers = {}
 
-        self.server_port = self.http_server.server_port
+            self.server_port = self.http_server.server_port
+
+    def _do_serve(self):
+        self.http_server.serve_forever(poll_interval=0.01)
 
     def make_url(self, path: str) -> str:
         return f"http://localhost:{self.server_port}{path}"
@@ -88,14 +108,16 @@ class TestWebServer:
         response.write_to(handler)
 
     def __enter__(self):
-        self.server_thread.start()
-        return self
+        with dumb_trace("__enter__"):
+            self.server_thread.start()
+            return self
 
     def __exit__(self, exc_type, exc_value, traceback):
-        del exc_type
-        del exc_value
-        del traceback
-        self.http_server.shutdown()
+        with dumb_trace("__exit__"):
+            del exc_type
+            del exc_value
+            del traceback
+            self.http_server.shutdown()
 
 
 TEST_FEED = b"""