diff --git a/src/controller/handlers/solution_check_handler.py b/src/controller/handlers/solution_check_handler.py
index 85bfe7c..b45d7fd 100644
--- a/src/controller/handlers/solution_check_handler.py
+++ b/src/controller/handlers/solution_check_handler.py
@@ -8,4 +8,4 @@ class SolutionCheckHandler(RequestHandler):
     def get(self):
         self.solvable_connector.send('solution_check', {})
         resp_key, resp_data = self.solvable_connector.recv()
-        return resp_data
+        self.write(resp_data)
diff --git a/src/controller/handlers/test_handler.py b/src/controller/handlers/test_handler.py
index 0514e08..bc4d690 100644
--- a/src/controller/handlers/test_handler.py
+++ b/src/controller/handlers/test_handler.py
@@ -8,4 +8,4 @@ class TestHandler(RequestHandler):
     def get(self):
         self.solvable_connector.send('test', {})
         resp_key, resp_data = self.solvable_connector.recv()
-        return resp_data
+        self.write(resp_data)