diff --git a/connexion/decorators/produces.py b/connexion/decorators/produces.py
index 420af56a1..296ef8fe7 100644
--- a/connexion/decorators/produces.py
+++ b/connexion/decorators/produces.py
@@ -125,7 +125,7 @@ def wrapper(*args, **kwargs):
                 logger.debug('Endpoint returned an empty response (204)', extra={'url': url, 'mimetype': self.mimetype})
                 return '', 204, headers
 
-            data = [json.dumps(data, indent=2), '\n']
+            data = json.dumps(data)
             response = flask.current_app.response_class(data, mimetype=self.mimetype)  # type: flask.Response
             response = self.process_headers(response, headers)
 
diff --git a/connexion/problem.py b/connexion/problem.py
index c7b3b574f..5411e0bb3 100644
--- a/connexion/problem.py
+++ b/connexion/problem.py
@@ -41,13 +41,13 @@ def problem(status, title, detail, type='about:blank', instance=None, headers=No
     :return: Json serialized error response
     :rtype: flask.Response
     """
-    problem_response = {'type': type, 'title': title, 'detail': detail, 'status': status, }
+    problem_response = {'type': type, 'title': title, 'detail': detail, 'status': status}
     if instance:
         problem_response['instance'] = instance
     if ext:
         problem_response.update(ext)
 
-    body = [json.dumps(problem_response, indent=2), '\n']
+    body = json.dumps(problem_response)
     response = flask.current_app.response_class(body, mimetype='application/problem+json',
                                                 status=status)  # type: flask.Response
     if headers:
diff --git a/tests/api/test_bootstrap.py b/tests/api/test_bootstrap.py
index 8eeaa1b87..e8f3cfa00 100644
--- a/tests/api/test_bootstrap.py
+++ b/tests/api/test_bootstrap.py
@@ -109,13 +109,13 @@ def route2():
 def test_resolve_method(simple_app):
     app_client = simple_app.app.test_client()
     resp = app_client.get('/v1.0/resolver-test/method')  # type: flask.Response
-    assert resp.data.decode() == '"DummyClass"\n'
+    assert resp.data.decode() == '"DummyClass"'
 
 
 def test_resolve_classmethod(simple_app):
     app_client = simple_app.app.test_client()
     resp = app_client.get('/v1.0/resolver-test/classmethod')  # type: flask.Response
-    assert resp.data.decode() == '"DummyClass"\n'
+    assert resp.data.decode() == '"DummyClass"'
 
 
 def test_add_api_with_function_resolver_function_is_wrapped(simple_api_spec_dir):
diff --git a/tests/api/test_parameters.py b/tests/api/test_parameters.py
index 8e4211745..71e194af4 100644
--- a/tests/api/test_parameters.py
+++ b/tests/api/test_parameters.py
@@ -74,7 +74,7 @@ def test_strict_extra_query_param(strict_app):
 def test_path_parameter_someint(simple_app):
     app_client = simple_app.app.test_client()
     resp = app_client.get('/v1.0/test-int-path/123')  # type: flask.Response
-    assert resp.data.decode() == '"int"\n'
+    assert resp.data.decode() == '"int"'
 
     # non-integer values will not match Flask route
     resp = app_client.get('/v1.0/test-int-path/foo')  # type: flask.Response
@@ -84,7 +84,7 @@ def test_path_parameter_someint(simple_app):
 def test_path_parameter_somefloat(simple_app):
     app_client = simple_app.app.test_client()
     resp = app_client.get('/v1.0/test-float-path/123.45')  # type: flask.Response
-    assert resp.data.decode() == '"float"\n'
+    assert resp.data.decode() == '"float"'
 
     # non-float values will not match Flask route
     resp = app_client.get('/v1.0/test-float-path/123,45')  # type: flask.Response