diff --git a/tests/test_api.py b/tests/test_api.py
index 07b31b90..2e49037f 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -19,7 +19,7 @@ class APITestCase(TestCase):
             "GET",
             content_type="application/json",
         )
-        self.assertEqual(status, "200 OK")
+        self.assertEqual(status, 200)
         study_summaries = json.loads(body)["study_summaries"]
         self.assertEqual(len(study_summaries), 2)
 
@@ -39,7 +39,7 @@ class APITestCase(TestCase):
             content_type="application/json",
             body=json.dumps(request_body),
         )
-        self.assertEqual(status, "201 Created")
+        self.assertEqual(status, 201)
         self.assertEqual(len(storage.get_all_study_summaries()), 1)
 
     def test_create_study_duplicated(self) -> None:
@@ -59,7 +59,7 @@ class APITestCase(TestCase):
             content_type="application/json",
             body=json.dumps(request_body),
         )
-        self.assertEqual(status, "400 Bad Request")
+        self.assertEqual(status, 400)
         self.assertEqual(len(storage.get_all_study_summaries()), 1)
 
     def test_delete_study(self) -> None:
@@ -75,7 +75,7 @@ class APITestCase(TestCase):
             "DELETE",
             content_type="application/json",
         )
-        self.assertEqual(status, "204 No Content")
+        self.assertEqual(status, 204)
         self.assertEqual(len(storage.get_all_study_summaries()), 1)
 
     def test_delete_study_not_found(self) -> None:
@@ -87,7 +87,7 @@ class APITestCase(TestCase):
             "DELETE",
             content_type="application/json",
         )
-        self.assertEqual(status, "404 Not Found")
+        self.assertEqual(status, 404)
 
 
 class BottleRequestHookTestCase(TestCase):
@@ -104,4 +104,4 @@ class BottleRequestHookTestCase(TestCase):
                     "GET",
                     content_type="application/json",
                 )
-                self.assertEqual(status, "200 OK")
+                self.assertEqual(status, 200)
diff --git a/tests/wsgi_utils.py b/tests/wsgi_utils.py
index 4a88b9c3..d6975951 100644
--- a/tests/wsgi_utils.py
+++ b/tests/wsgi_utils.py
@@ -47,7 +47,7 @@ def send_request(
     queries: Optional[Dict[str, str]] = None,
     headers: Optional[Dict[str, str]] = None,
     content_type: str = "text/plain; charset=utf-8",
-) -> Tuple[str, List[Tuple[str, str]], bytes]:
+) -> Tuple[int, List[Tuple[str, str]], bytes]:
     status: str = ""
     response_headers: List[Tuple[str, str]] = []
 
@@ -65,4 +65,5 @@ def send_request(
     for b in iterable_body:
         body += b
 
-    return status, response_headers, body
+    status_code = int(status.split()[0])
+    return status_code, response_headers, body