Fixed some Flask tests

tests/integrations/flask/test_flask.py

@@ -394,6 +394,7 @@ def index():
     client = app.test_client()
     response = client.post("/", data=data)
     assert response.status_code == 200
+    response.close()
 
     event, transaction_event = events
 
@@ -746,6 +747,7 @@ def hi_tx():
     with app.test_client() as client:
         response = client.get("/message_tx")
         assert response.status_code == 200
+        response.close()
 
     message_event, transaction_event = events
 
@@ -938,7 +940,8 @@ def test_response_status_code_not_found_in_transaction_context(
     envelopes = capture_envelopes()
 
     client = app.test_client()
-    client.get("/not-existing-route")
+    response = client.get("/not-existing-route")
+    response.close()
 
     sentry_sdk.get_client().flush()
 
@@ -983,14 +986,18 @@ def test_transaction_http_method_default(
     events = capture_events()
 
     client = app.test_client()
+
     response = client.get("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     response = client.options("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     response = client.head("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     (event,) = events
 
@@ -1020,14 +1027,18 @@ def test_transaction_http_method_custom(
     events = capture_events()
 
     client = app.test_client()
+
     response = client.get("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     response = client.options("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     response = client.head("/nomessage")
     assert response.status_code == 200
+    response.close()
 
     assert len(events) == 2