diff --git a/sanic/app.py b/sanic/app.py
index fe6d2708..753f477b 100644
--- a/sanic/app.py
+++ b/sanic/app.py
@@ -86,6 +86,7 @@ class Sanic:
         self.websocket_tasks: Set[Future] = set()
         self.named_request_middleware: Dict[str, MiddlewareType] = {}
         self.named_response_middleware: Dict[str, MiddlewareType] = {}
+        self._test_manager = None
         self._test_client = None
         self._asgi_client = None
         # Register alternative method names
@@ -1032,18 +1033,22 @@ class Sanic:
     # -------------------------------------------------------------------- #
 
     @property
-    def test_client(self):
+    def test_client(self):  # noqa
         if self._test_client:
             return self._test_client
+        elif self._test_manager:
+            return self._test_manager.test_client
         from sanic_testing.testing import SanicTestClient  # type: ignore
 
         self._test_client = SanicTestClient(self)
         return self._test_client
 
     @property
-    def asgi_client(self):
+    def asgi_client(self):  # noqa
         if self._asgi_client:
             return self._asgi_client
+        elif self._test_manager:
+            return self._test_manager.test_client
         from sanic_testing.testing import SanicASGITestClient  # type: ignore
 
         self._asgi_client = SanicASGITestClient(self)
diff --git a/tests/test_static.py b/tests/test_static.py
index 23ba05d7..78c114b9 100644
--- a/tests/test_static.py
+++ b/tests/test_static.py
@@ -1,5 +1,6 @@
 import inspect
 import os
+
 from pathlib import Path
 from time import gmtime, strftime
 
@@ -93,8 +94,8 @@ def test_static_file_pathlib(app, static_file_directory, file_name):
     [b"test.file", b"decode me.txt", b"python.png"],
 )
 def test_static_file_bytes(app, static_file_directory, file_name):
-    bsep = os.path.sep.encode('utf-8')
-    file_path = static_file_directory.encode('utf-8') + bsep + file_name
+    bsep = os.path.sep.encode("utf-8")
+    file_path = static_file_directory.encode("utf-8") + bsep + file_name
     app.static("/testing.file", file_path)
     request, response = app.test_client.get("/testing.file")
     assert response.status == 200